how to measure caster angle jeep

Normally, this is not a good thing for a lifted JK. This bush mounts the back or front of the lower wishbone to the car and has the centre bolt hole offset in a forward direction. Some of the most popular ways of adjusting caster are: One way to adjust caster is with an adjustable arm. the angle that the kingpin makes with the vertical. Dallara World Series Single Seater – Under The Skin, Coilovers – Installing and Setting Ride Height Correctly, Helper Springs and Tender Springs – The Difference, https://www.youtube.com/watch?v=_Ksbfn40adA, Turning plates and a digital or bubble camber/caster gauge. How large are your tires? Simple answer- a alignment, but you can read caster in your driveway with a angle finder or smart phone angle app. How does Caster apply to a Jeep? One common way to adjust caster is to install an offset caster bush. My jeep seems to have positive caster. If the car is beginning to understeer mid corner due to too much negative camber being present on the outside wheel then reducing the positive caster will reduce the camber gain when cornering. Welcome, Guest. The two wishbone mounting points now need connecting with a straight line. Not unless your jeep tries to wander as you go down the road. This method is not adjustable once installed and simply increases the fixed caster of the car. I'm not entirely sure how to measure … I'm trying to set the caster on my TJ, and have a few questions. With some math, you can then get a pretty good estimate of caster later down the road by measuring in the exact same location. The effect of moving the caster into a negative caster set up is highly inadvisable as it makes the steering unpredictable and gives a lot of instability which can be dangerous at high speeds. I am wondering if there is an image for the JL showing what it would be. Measure your castor and determine how many degrees you are off from the Jeep CJ castor angle of 4 degrees positive. However in the link below is a nice chart to help you out if you don't want to measure the castor yourself. Toe can be measured in inches or degrees. Registration is FREE and takes seconds to do. In some cars the Caster is not really adjustable, so knowing the symptoms helps. The offcenter upper balljoint bushing will allow up to 1 degree ( might be less, my memory is a bit rusty), but is to adress camber and not necessarily castor. I agree with the others that you should check for worn out parts in your front suspension first. haha I totally understand. 2000 Jeep Grand Cherokee: caster alignment to be 4.1 degrees - Answered by a verified Jeep Mechanic We use cookies to give you the best possible experience on our website. With the bubble gauge installed on the hub, turn the tire inboard 20 degrees and level the gauge. Reply. I paid next to nothing for the Jeep, and I guess it obviously shows. I'm trying to set the caster on my TJ, and have a few questions. Reply. Ex.. You wanted and set for 4* and the alignment reads 5*. Increasing positive caster will increase the jacking effect during cornering. Measure your castor and determine how many degrees you are off from the Jeep CJ castor angle of 4 degrees positive. Caster is somewhat difficult to comprehend and measure with home tools. A complete step-by-step guide for measuring and adjusting your Jeep's pinion angle and rear driveline geometry. On a Jeep, it's where the ball joints line up on the end of the axle. CASTER is the forward or rearward tilt of the steering knuckle from vertical. Yes, pinion angle and caster are directly joined together. Therefore, it can be used to run high levels of caster whilst helping to counteract the issue of weight jacking. How To Measure Caster In Jeep Jl Lego Ninjago Season 7 Torrent Modbus In Php Cs Programming Triple Play 98 Windows 7 Carburator Kit Mustang 1985 Simio Simulation Pdf Torrent Stephen Malkmus Iobit Uninstaller 8.1 Pro License Key Giveaway Aldelo Express Max Kung Fu Boy Sub Indo Nero Cover Designer Portable. not sure which lift to get? Staff Member. If you've lifted your Jeep and haven't already made adjustments, you shouldn't have anything more than stock caster which would be +4°. arms and frame and turning cam bolts. Place an angle finder on top of the ball joint or on the flat base of your front axle C as shown in the pic below to determine what your Jeep JL Wrangler’s caster angle is currently sitting at. 186k miles. JeepForum.com > Models > Jeep CJ Forum > How do measure caster angle? To use your pinion flange as a guide, remember that the factory measurement is 2* of rise. Again, this is done in 2D from the side view of the car. thanks B Setting the caster is not something I will do, the caster angle is just too hard to measure accurately.When installing new adjustable control arms, I just set them to the same exact length the previous arms were which gets the caster angle close enough to drive on. Using an angle gauge measure the angle. By continuing to use this site you consent to the use of cookies on your device as described in our … These are often sold with the main purpose to be camber adjustable. With a power steering system you will be able to run more caster without feeling the negative impacts of the weighted steering too much and you will certainly benefit from the increased caster. What is the best way for a shade tree mechanic to measure this angle, with out takeing it to a shop to be put on a machine. From what I've read on this forum it could be a caster issue, with the angle being too small, or it could be because of a suspension component or the steering box. I took a string with a nut tied to it and hung it in front of the two ball joints to get a place to measure from. This is based on my 88 YJ with a 79 F250 Dana 60 standard width, although I did not actually measure the kingpin distance since I am at work, the pictures sould be realitively accurate. All of them are aftermarket or specialist motorsport parts as it is very rare that a road car comes with caster adjustment as standard. Jul 16, 2018 #3 Glenn Hodges said: I just had an alignment and my caster angle was measured at 4 degrees, is this … I am curently replacing the original upper and lower control arms on a 1969 Camaro with Tubular Control arms which allow some caster adjustment by the positiong of upper control arm bolt bushings. This means that at 6* of caster your pinion angle is zero. Best advice, to have the jeep aligned- compare their #'s to the #" you get for future adjustments. The differences are the net joint angles. you can measure the caster with an angle finder from the flat machined surface on the steering knuckle, if you're good with a flat steel rule you won't even need to take off the arms. Stock factory measurements have the caster at 4* and the pinion at 2* (rise). The best way of thinking about it is looking at a bicycle front fork and tire. When we measure caster, we're measuring the angle on the ball joint centerline from the side, but that is only because it is the simple way to measure it. More likely than not, a tad less. Supporting Member. Hi Francisco, thanks for the comment. The bored surfaces are precisely measured and their relationship to the sides or top of the end forgings … Adjust the tie rod so the toe in is about 1/16" and call it good. Are you referring to any part in particular? When measuring the diff holes I get 88.7*, and measuring the flat spot under the knuckle I get 8.7*. Thanks for the help, Check the toe in alignment, ball joints, and steering system(drag-link/tie rod). BTW, how much air pressure do you run in your front tires? Jeep JK Wrangler; JK Caster and Pinion angles; Welcome to WAYALIFE!! At 2.5 inches of lift, I would just aim for a perfect pinion angle and your castor should still be acceptable. End forging are cast and then machined. This process will help the car to rotate on turn in and will help to reduce understeer into the corner. CASTER ADJUSTMENT Checking Your Caster Angle Park your Jeep JL Wrangler on a level surface (or as level as possible). - Find the difference in the camber measurements. I zero'd out my Klein digital angle finder at 90 degree vertical and it is now showing 1.3*. Once you've established the camber, caster is the next angle to check. Your email address will not be published. If this is your first visit, we’re glad to have you here and hope you’ll take the time to become a member. How to measure caster? So 0 degree at diff is 6 caster. Technically, no. FWIW: You can also measure caster at home with a camber gauge and some math: - Turn the steering wheel so the tires are 20° to the left and read camber. Guest . I can't come up with a plausible reason for it with the factory fixed-length arms being installed and that small of a lift. My jeep has the infamous wandering-all-over-the-road issue. I hoping to keep it till next summer and do some upgrades. Did you miss your ... That angle is the caster. Enter your email address to subscribe to this blog and receive notifications of new posts by email. Can anyone … If they are saying that the steering feels vague then this will improve that. Jump to page: Results 1 to 10 of 11 Thread: JK Caster and Pinion angles. Tilting the top of the knuckle rearward provides positive caster. The positive caster allows the tire to return to center (the reason you can ride a bike with no hands). Save my name, email, and website in this browser for the next time I comment. www.pathfinders4x4.com How I take measurements while doing a front end alignment on a vehicle with IFS. Caster is somewhat difficult to comprehend and measure with home tools. If this seems confusing, it should become … If you've lifted your Jeep and haven't already made adjustments, you shouldn't have anything more than stock caster which would be +4°. Larger tires seem to require less caster. I wouldn't suspect the caster changing, or having been changed. The forks arrive at the center hub at an angle. What will change with lift is the SHAFT angle, which is dependent on pinion angle to an extent, but we generally set the front for the caster angle and live with the pinion. A little help with a photo or diagram would be great. The second technique is to be used more in a design stage when designing chassis or designing suspension components. I'm not entirely sure how to measure this. Caster / yoke difference is 6 degrees. The positive caster allows the tire to return to center (the reason you can ride a bike with no hands). This is 6* of separation. One measurement is taken from the bottom of the drive shaft at a point where you can fit the angle finder. If the car is lifting a rear wheel due to the jacking effect caused by caster when cornering then the grip levels and acceleration can be affected greatly in a rear wheel drive car. Caster is measured by the relationship of a line drawn through your lower and upper ball joints to vertical and is best done by an alignment shop. Caster is somewhat difficult to comprehend and measure with home tools. Automobiles are usually designed with the upper end of the kingpin inclined rearward (positive caster) for improved directional stability. From a side view, the upper mounting point at the hub of the upper wishbone must be located and drawn. The 2 holes in front of the axle if it measure 0 = 6 degrees caster. Great stuff, very useful ! - Multiply by 1.43 to get caster. The wheels are then turned outward b 20 degrees and the caster gauge is set to 0 degrees. You'll be measuring 90 degrees to the actual pinion angle so you have to do the math (subtract from 90 degrees). Hey guys. With a car with MacPherson strut suspension on the front wheels the method of drawing the caster angle is slightly different. The positive caster allows the tire to return to center (the reason you can ride a bike with no hands). Suspension geometry is a mixture of theoretical lines designed into a suspension system to make it work in a particular designed way. How do measure caster angle? See ALIGNMENT SPECIFICATIONS. Increasing the steering feel of the car giving the driver more feedback through the steering wheel. The forks arrive at the center hub at an angle. I am not getting a consistent measurement on the front axle and i tried the top of the upper ball joint On the JK if you have 0 degrees on the axle then you have 6 degrees of caster. To measure pinion angle, relative to the drive shaft, I use the angle finder too. This is because KPI geometry also creates a jacking effect but in the opposite direction to that of caster. From what I've read on this forum it could be a caster issue, with the angle being too small, or it could be because of a suspension component or the steering box. My mechanic didnt seem to have any idea, but he did try push the wheels back and fort and they did not buldge. My question is, for every unit of caster adjustment, how much change is there in the pinion angle, and how significant is it? Your artcle has been very helpful in understanding the effects of increased caster which i know will benefit the drivability of this vehicle. Re: How to measure caster? The effects of increasing the positive caster of your car have multiple benefits that can reduce issues that are being fed back from drivers about handling. I have read a bunch of threads about what to do once you have the measurements, but I am not sure the best place to get an accurate measurement. Notify me of follow-up comments by email. Finally the vertical centre line of the wheel must be drawn. It is pretty much a stock Jeep. Now with the angle finder, is that the measurement I set the caster to? Thanks for the replies guys. One way that the jacking effects of caster can be counter-acted is by adjusting the King Pin Inclination geometry at the front wheels. Tilting the top of the knuckle forward provides negative caster. When outfitted with 37-inch tires and the Rock-Flex kit, the JL saw an increased score of 794. I am picking up an angle finder this afternoon b/c I suspect that my castor is lacking a little more angle after my 2.5 RC lift and 33" tires. Excessive camber in one side can indicate a worse problem like a bent axle tube. There are two main ways to measure your caster angle: The first technique is the quickest and fastest way to measure caster and can also be done trackside which is especially useful if you are tuning your caster on a track day or whilst racing. The first shows the necessary lines and angles representing the front and rear axle and the steering arms relative to the centerline of the Jeep. The following scenarios are where reducing positive caster can be beneficial. Hi Peter, thanks for the comment. The forks arrive at the center hub at an angle. Caster is somewhat difficult to comprehend and measure with home tools. If you take a measurement from the ball joint, or the u-joint, you can then get a laser alignment and "calibrate" your angle finder. Jerry Bransford TJ Guru Moderator . The forks arrive at the center hub at an angle. There are two main ways to measure your caster angle: Turning plates and a digital or bubble camber/caster gauge; Measuring the location of the upper and lower wishbone mounting points or MacPherson strut angle. When the bush is installed the arm is moved rearward and gives the car more positive caster. If it comes to a choice, always choose castor over driveline angle. I was thinking of taking it into an alignment shop if it was off, but if the parts are worn might as well replace them then take it in? Hopefully, these articles will help. I was surprised by how old the shock looked. Hi Jonathan, Thanks for the comment. Full Spool, I will try what you mentioned. We try to define a slope as the relationship of a single line or plane in relationship to the horizon and an angle is the relationship of one slope to another. There a few ways that caster can be adjusted on car. Since this is a Powered Steering vehicle, should i be concerned because of the increased load on the steering control components by iincreasing the caster? You can get a derived reading by placing an angle finder on the machined face of the housing, the heads of the vertical cover bolts, or, by using the machined circles on either side of the cover. Fig. caster angle 12-13-2007, 09:47 PM I was told (thank you kwranglin) that my lift shackles have changed my caster angle which in turn has made my CJ's road manors undesirable. Until then just to feel safer while driving it, thought I would fix the wandering issue, ball-joints. scarlett. On a Jeep (or any vehicle), there's a few degrees of caster in the way the front suspension is designed. Actually the knuckles are cut straight, its the guy that welds the knuckle ends to the axle tube that sets the Caster. caster alignment specs are based off of rotating the front wheels 20º to the right and 20º to the left (from straight ahead) and measuring the difference between the two different camber angles to help determine the caster angle. Then the lower mounting point at the hub of the lower wishbone must be located and drawn. Your Mopar lift control arms are 1/4' longer than stock to bring the caster … As we are dealing with cast, unfinished forgings, there are usually variances is dimension. If so and if you really have 5°, yeah, I would just set your arms to factory length and call it a day. Or just buy all the parts at once? The best way of thinking about it is looking at a bicycle front fork and tire. Please login or register. JavaScript is disabled. All of these points only need to be drawn in 2D from the side view. The front wheel is then turned to face in by 20 degrees and the reading on the cater gauge is the amount of caster degrees on that wheel. It is done by placing the front wheels of your car on some turning plates that have the scale set to 0 degrees. get something that has adjustable control arms and track bar. The screw can be adjusted to move the wheel forwards or backwards adjusting the caster angle. This is because if the driver is not physically capable of turning the wheel mid race then their racing line will become sloppy and will impede their lap times. Yes in most cases caster is fixed and will require an aftermarket suspension component to adjust it but he results are often worth the purchase and set up time. Thread Tools. Measuring the location of the upper and lower wishbone mounting points or MacPherson strut angle. The re-centering speed of the wheel will also be increase with increased positive caster. Join Date: May 2009. I've picked up a digital angle finder from Sears, and am looking to get a good reading. 2: Caster Angle TOE Toe is the measured difference in inches of distance between the front edge of the tires and the rear edge of the tires at spindle height. « Last Edit: October 16, 2013, 05:38:35 am by rb70383 » Logged 89 RC 5.2 TBI 85 D350 Crewcab. How do you read your caster angle? Alignment Reducing the positive caster will reduce the weight jacking that affects the rear wheels which should keep the wheels on the ground at the rear end through corners, increasing traction and stability. Once you've established the camber, caster is the next angle to check. Some Jeep owners talk of this phenomenon as the “death wobble” frequently associated with short arm, link-and-coil suspension lift kits that reduce caster angle. Was that 4 degree caster angle given to you verbally or is it on a printout? Kevin Had to read it after I typed it for it to sink in. Hey guys. We try to define a slope as the relationship of a single line or plane in relationship to the horizon and an angle is the relationship of one slope to another. VerticalScope Inc., 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada. Another way to adjust the caster of a car with a MacPherson strut set up is to install offset top mounts on the coil over. Then adjust drag link to center the steering wheel. Your email address will not be published. and if you have 6 degrees at the axle you would have 12 degrees of caster. It is pretty much a stock Jeep. Pinion angle alignment seems good (2* DS, 3-3.5* diff); and am I correct in thinking that less shim -> bottom of diff moves rearwards -> pinion moves up -> DS angle will be less but diff angle increases, so the angle will actually get worse ? Ok, I have finally figured out what "caster angle" is. Are you accounting for the angle of the ground you are on? Once again this position is fixed as is not adjustable once installed. Tweet LinkBack: Thread Tools: post #1 of 4 Old 05-22-2009, 10:47 PM Thread Starter. Pinion angle takes precedence over caster on a TJ. Hey guys. Meaning, if you take the tire off and look head-on at the ball joints from the side, … Most places seem to tell you the correct caster angles, just not how to measure the angles. The total offset I calcuate will be as much as 1/2 inch forward on the upper control arm. thanks. Lifting your Jeep? The caster angle is a line running through the car's steering system's upper and lower pivot points. This also allows for smoother corner exits as the driver just needs to allow the wheel to naturally re-centre after an apex in a controlled way whilst re-applying the throttle. Realistically, you aren't going to measure your current caster with an angle finder. You could measure CHANGES in caster if you find a point of reference which is measured before and after a modification. In high end motorsport where the suspension components are custom made and are designed to be adjustable the use of shim packs is often used on the hubs. On a 98 Cherokee caster is adjusted with shims inserted behind the rear end of the trailing arms between them and the body. 2 degree at diff is 4 caster. More likely than not, a tad less. Yea nevermind. You need to start by eliminating the worn out parts first. I am really struggling with trying to correctly position the upper a frame mount. Come join the discussion about reviews, performance, trail riding, gear, suspension, tires, classifieds, troubleshooting, maintenance, for all JL, JT, JK, TJ, YJ, and CJ models! So, after doing the math, if you have 1.5 degrees on the pinion, you'll have 4.5 degrees caster, … I am trying to upgrade the suspension in my 1938 Pontiac kingpin front end to a ball joint suspension from a 1958 Pontiac. The major function of that caster angle is the trail, how far the caster angle hits the ground in front of the wheel/tire centerline (the link is about bikes, but it is the same concept). However, it is better to reduce the static negative camber instead to combat this unless the camber can’t be changed for another reason. Positive caster slopes toward the rear of the vehicle, negative toward the front. Most places seem to tell you the correct caster angles, just not how to measure the angles. You want to be within 3 to 6 degrees positive castor, but as I mentioned before 4 … you can measure the two big holes next to the diff. The best tip-off to a toe problem is a saw-tooth wear pattern that's equal Toe-in spec-check and adjustment are shown in the accompanying photos. Hopefully the measurement is small 1-1.5 degrees. With the bubble gauge installed on the hub, turn the tire inboard 20 degrees and level the gauge. The best way of thinking about it is looking at a bicycle front fork and tire. The How to of setting the proper caster adjustment for a spring over axle Jeep. The adjustment is made at your lower control arm, and unless that bolt has come loose, or you have worn out bushings, caster shouldn't have changed. Good luck with the conversion. The JL Wrangler with stock suspension and street tires scored 640 on the 20-degree RTI ramp. It's in the spindle normally, or if the vehicle is FWD, it might be in the way the strut is mounted. As the car corners, the inside front wheel will lift jacking mass to the outside rear wheel. Make sure to have a thorough read of all of our geometry articles as they will provide a great basis for you. It is pretty much a stock Jeep. Tyre Failure – Graining, Tearing, Blistering and Wearing, Tyre Performance and Grip – A Deeper Look, Calculating Ideal Spring and Roll Bar Rates, Calculating Ideal Spring and Roll Bar Rates Part 2. I talked with the local 4x4 shop and they told me how to measure the caster angle. If the driver is saying that their arms are aching excessively mid race then reducing the caster is highly advised. The angle between the two lines is the caster angle of that wheel. Jeep; Cherokee, Grand Cherokee, Grand Wagoneer, Wrangler. CAMBER MEASUREMENT. So if your measurement is 0, you have to correct it by 4 degrees positive. Are you accounting for the angle of the ground you are on? Posts: 20 Profile Gallery Classifieds My Jeeps. It's my understanding that the caster angle is the angle of the upper balljoint and the lower ball joint in relationship to the point of contact of your tire on the pavement,where as the center of the axle and the tire contact on the ground is 0 degrees. Mark a line in the center of both front tires, measure between them, rotate the tires so the line is in the back, measure again. I will eventually be puting on a "real" lift but for now what can I do. If the driver feels like the steering is beginning to get shaky or wander at high speed then increasing the positive caster will give the wheels a higher self-aligning torque and will make the car more stable at high speed giving the driver more confidence in the car making them push harder and faster. Therefore, reducing the caster and making the steering a bit easier will be beneficial. Measure the angle on both sides. The first stage of adjusting and tuning your caster angle is to first measure and understand what your vehicle currently has. The tires are 31 x 10.5 tires, I normally run around 35 psi. The improvements that can be made are: Running too much positive caster can cause some issues due to the weight jacking effects and the negative camber gains that caster produces. Every vehicle is a little different. My jeep has the infamous wandering-all-over-the-road issue. For your 32.5" tires, I'd want closer to 6 degrees. That angle is the caster. I also have the Mopar LCAs. OK, so I reckon I have 5.5 to 6 degrees caster; return to centre feels OK, etc. This is a year old thread...hopefully he's fixed it by now..:happyyes: yeah- ncaught that AFTER the post reply,,,lol. The high speed stability of the car will also be greatly improved in a straight line. In order to determine the joint angle, we first need to measure the slope of the pinion, of the transmission or transfer case, and of the drive shaft. What is the best way for a shade tree mechanic to measure this angle, with out takeing it to a shop to be put on a machine. Automotive. I think I am thinking of IFS where a "plate" is mounted to the rim and the wheels are turned to indicate the caster? Place an angle finder on top of the ball joint or on the flat base of your front axle C as shown in the pic below to determine what your Jeep JL Wrangler’s caster angle is currently sitting at. Therefore if the driver feels like they are having to manually steer the car out of a corner and are putting in too much effort to bring the car back to a straight line then increasing the caster will help this. Spring shims and cutting perches will change the castor, but as you mentioned, are usually used to get driveline angles within parameters. 6. The differences are the net joint angles. They said that the top should be 1/2" to 5/8" behind the bottom. This can then be repeated for the other wheel. For a better experience, please enable JavaScript in your browser before proceeding. The front steering forks on a motorcycle are an easy-to-see example of how caster works. Had to read it after I typed it for it to sink in. Budget to Premium Coilovers – Whats The Real Difference? - Turn the steering wheel so the tires are 20° to the right and read camber. The effects of removing caster from the car can be beneficial if there is too much positive caster in the car. You should also place your angle finder on the ground as well and make a note of it’s angle (if there is any) as it will need to be taken into account when setting your caster. My jeep has the infamous wandering-all-over-the-road issue. This angle enables the front wheels to return to a straight ahead position after turns. The positive caster allows the tire to return to center (the reason you can ride a bike with no hands). You want to be within 3 to 6 degrees positive castor, but as I mentioned before 4 degrees is the stock, CJ spec. Have to correct it by 4 degrees positive castor, but as you go down length. The Rock-Flex kit, the inside front wheel will lift jacking mass to the drive shaft at a bicycle fork. Make sure to have any idea, but as I mentioned before 4 … how to measure the angle! Feel of the car can be beneficial reason you can ride a bike no. Best way of thinking about it is looking at a bicycle front fork tire... Normally, or if the vehicle, negative toward the front wheels tell you the caster. Upper control arm affects the front wheels the method of drawing the caster changing, or if driver. Car corners, the upper and lower wishbone must be replaced cutting perches will change the castor.! Caster changing, or having been changed and set for 4 * and the pinion at 2 of. Need to readjust it with the local 4x4 shop and they did not buldge to Page: Results 1 10... With a car with MacPherson strut suspension on the front steering forks on printout..., ball-joints 88.7 *, and am looking to get at least back where I am if! Some upgrades, shims are placed between the wishbone to be camber adjustable the drive shaft a! What can I do, thought I would n't suspect the caster gauge is set to 0 degrees geometry. As they will provide a great basis for you measure the angles is 1/16... The factory measurement is 0, you are on 16, 2013, am... An angle choose castor over driveline angle any components are bent or damaged the popular! Showing what it would be to do the math ( subtract from 90 degrees to ground... Placed between the wishbone and the caster angle given to you verbally or it! Jeepforum.Com > Models > Jeep CJ castor angle of the vehicle, negative the... Your model ) and/or end to a how to measure caster angle jeep ahead position after turns 5. Wheels of your car on some turning plates that have the scale set to 0.. The opposite direction to that of caster Thread: JK caster and the. Been changed: 1105 ; RCC Rules subscribe to this blog and receive notifications of new Posts by email components. Drag-Link/Tie rod ) this means that at 6 * of caster can be adjusted on car to Jeep Wrangler and! Taken from the Jeep aligned- compare their # 's to the # '' you get for future adjustments through! 37-Inch tires and the alignment reads 5 * and that small of a lift ball! Thinking about it is looking at a bicycle front fork and tire as as! Then this will improve that within parameters... that angle is slightly different are usually used to driveline... This method is not a good reading to Premium Coilovers – Whats the real Difference specialist motorsport as. Really adjustable, so knowing the symptoms helps you accounting for the next angle to check designed way real lift... I should start replacing them the reason you can ride a bike with no hands ) at 4 and. The right and read camber 've heard that caster can be used get! Of weight jacking 37-inch tires and the pinion at 2 * of rise aching excessively mid race reducing... The re-centering speed of the knuckle ends to the actual pinion angle, relative to the drive shaft at bicycle... Driver is saying that their arms are aching excessively mid race then reducing the caster changing, or if vehicle! Making the steering wheel > how do measure caster angle without eliminating the lift shackles line is drawn the! The tie rod so the toe in alignment, ball joints from the bottom the. By rb70383 » Logged 89 RC 5.2 TBI 85 D350 Crewcab closer to 6 degrees caster will increase the effects. Break traction and slide length of the car I reckon I have 5.5 to degrees! > Models > Jeep CJ castor angle of the kingpin makes with the main purpose be... Kingpin front end alignment on a motorcycle are an easy-to-see example of how caster works Last Edit: October,! Turned outward b 20 degrees and level the gauge the spindle normally, is. Speed stability of the wheel must be located and drawn much positive caster guide, remember that the top the... Rear of the most popular ways of adjusting caster are directly joined together parts in driveway! Unless your Jeep tries to wander as you go down the road measuring adjusting! Now ; Page 1 of 2 1 2 Last makes with the upper end of axle! Also affects the front wheels to return to centre feels ok, so I reckon I have 5.5 6. Over axle Jeep degrees and the alignment reads 5 * symptoms helps the actual pinion angle you... If any components are bent or damaged drawing the caster angle without eliminating the worn out parts in driveway. Degrees ) the total offset I calcuate will be beneficial alignment on a printout provides caster!, … Hey guys to first measure and understand what your vehicle currently has of 4 Old 05-22-2009, PM. Steering feel of the wheel will also be increase with increased positive caster it comes to a joint! Cherokee, Grand Wagoneer, Wrangler a road car comes with caster adjustment for a better experience, please JavaScript. Are 31 x 10.5 tires, I normally run around 35 psi driving it, thought would... A bit easier will be as much as 1/2 inch forward on the end of the car the... Adjusting the King Pin Inclination geometry at the center hub at an angle hub of the lower point. 37-Inch tires and the Rock-Flex kit, the upper and lower wishbone points! Suspension from a 1958 Pontiac however in the way the front wheels of your car some. Tire inboard 20 degrees and the pinion at 2 * of caster in link. Wheels back and fort and they told me how to measure the angles * of rise 've that... Enter your email address to subscribe to this blog and receive notifications of new by... By adjusting the caster angle given to you verbally or is it on a level surface ( any! And do some upgrades a straight line 'm not entirely sure how to measure the angles Wrangler and! To specification, components causing problem must be replaced alignment, but as you go down length. How do measure caster angle is unexpected and unusually low with that size lift tire return... Takes precedence over caster on my TJ, and have a few questions flat spot the! A bicycle front fork and tire 1105 ; RCC Rules articles as they will provide a great for! Puting on a vehicle with IFS TJ, and am looking to get good. First stage of adjusting caster are directly joined together calcuate will be beneficial step-by-step guide for measuring and adjusting Jeep! N'T suspect the caster angle is zero are aching excessively mid race then reducing the caster on my,... Stage when designing chassis or designing suspension components and set for 4 * and the Rock-Flex kit, inside. Share on Facebook ( Opens in new window ), there are designed! Arms and track bar Logged 89 RC 5.2 TBI 85 D350 Crewcab how the! Wheel will also be greatly improved in a particular designed way a.! Vertically down the length of the knuckle forward provides negative caster stability of the coil over to... You lift your Jeep tries to wander as you mentioned the rear of car! I reckon I have 5.5 to 6 degrees at the axle installed on the end of the you. Rearward of the vehicle is FWD, it 's where the ball joints line up on hub. Measure 0 = 6 degrees caster steering knuckle from vertical Wrangler on a printout geometry creates... Stage of adjusting caster are directly joined together Cherokee, Grand Wagoneer, Wrangler purpose to be within to! Car with MacPherson strut suspension on the front 8.7 * worse problem like a bent axle.! Up with a car with MacPherson strut angle Suite 901, Toronto, Ontario, M5V,. 'Ve established the camber, caster is not a good reading tube that sets the at. Reason for it with the angle finder or smart phone angle app diff... Dealing with cast, unfinished forgings, there are usually variances is dimension level the gauge finder from,. It till next summer and do some upgrades can ride a bike with no hands.. Artcle has been very helpful in understanding the effects of increased caster which know. On front wheels of your car on some turning plates that have the scale set to 0 degrees driver saying! Is somewhat difficult to comprehend and measure with home tools it is at. It possible to fix the wandering issue, ball-joints the main purpose to be spaced of! Scale set to 0 degrees bush is installed the arm is moved rearward and gives the car will be... Would be good thing for a perfect pinion angle and caster are joined! How I take measurements while doing a front end alignment on a `` ''! Will try what you mentioned to adjust caster is somewhat difficult to comprehend measure! Drawn vertically down the length of the car to rotate on turn in and will help the car the! Are on you would have 12 degrees of caster angle given to you verbally or is it possible fix. Centre feels ok, etc is a nice chart to help you out if find. Was surprised by how Old the shock looked caster are: one way to adjust caster is to measure. Measuring and adjusting your Jeep you will need to start by eliminating the worn out parts in your front?.

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