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how to measure caster angle jeep

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! The tires are 31 x 10.5 tires, I normally run around 35 psi. 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. On a 98 Cherokee caster is adjusted with shims inserted behind the rear end of the trailing arms between them and the body. 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. I was surprised by how old the shock looked. Finally the vertical centre line of the wheel must be drawn. Caster is a directional stability angle. When outfitted with 37-inch tires and the Rock-Flex kit, the JL saw an increased score of 794. Ruderunner. Often, shims are placed between the wishbone and the hub on the side of the hub. Tweet LinkBack: Thread Tools: post #1 of 4 Old 05-22-2009, 10:47 PM Thread Starter. 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. Caster is somewhat difficult to comprehend and measure with home tools. That angle is the caster. Anyway, with the Jeep parked on a level surface hold a level centered on the hub from the top of the tire to the bottom. The wheels are then turned outward b 20 degrees and the caster gauge is set to 0 degrees. The best way of thinking about it is looking at a bicycle front fork and tire. If it comes to a choice, always choose castor over driveline angle. CAMBER MEASUREMENT. Your email address will not be published. Only 4 degrees of caster angle is unexpected and unusually low with that size lift. In the case of a MacPherson strut system this can be in the form of an adjustable tension rod that holds the lower arm forwards or backwards in the wheel arch. I am wondering if there is an image for the JL showing what it would be. Suspension geometry is a mixture of theoretical lines designed into a suspension system to make it work in a particular designed way. I am really struggling with trying to correctly position the upper a frame mount. 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. How do you read your caster angle? A second line is then drawn vertically down the centre line of the wheel. Guest . In this case, a line is drawn down the length of the coil over down to the ground. The positive caster allows the tire to return to center (the reason you can ride a bike with no hands). 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°. Measuring the location of the upper and lower wishbone mounting points or MacPherson strut angle. My question is, for every unit of caster adjustment, how much change is there in the pinion angle, and how significant is it? Then I … On a Jeep (or any vehicle), there's a few degrees of caster in the way the front suspension is designed. Pinion angle takes precedence over caster on a TJ. You want to be within 3 to 6 degrees positive castor, but as I mentioned before 4 … The jacking effect can also overload the outside rear tyre with too much mass causing it to break traction and slide. Jul 16, 2018 #3 Glenn Hodges said: I just had an alignment and my caster angle was measured at 4 degrees, is this … arms and frame and turning cam bolts. Realistically, you aren't going to measure your current caster with an angle finder. 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. thanks. I'm trying to set the caster on my TJ, and have a few questions. With the bubble gauge installed on the hub, turn the tire inboard 20 degrees and level the gauge. How large are your tires? Camber angle is NOT adjustable. A forum community dedicated to Jeep Wrangler owners and enthusiasts. 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? I'm not entirely sure how to measure … 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. 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. Jeep JK Wrangler; JK Caster and Pinion angles; Welcome to WAYALIFE!! More likely than not, a tad less. 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. Are you referring to any part in particular? Measure the angle on both sides. you can measure the two big holes next to the diff. 2 degree at diff is 4 caster. www.pathfinders4x4.com How I take measurements while doing a front end alignment on a vehicle with IFS. Lifting your Jeep? JeepForum.com > Models > Jeep CJ Forum > How do measure caster angle? The forks arrive at the center hub at an angle. Technically, no. If angle is not to specification, components causing problem must be replaced. 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. 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. As the car corners, the inside front wheel will lift jacking mass to the outside rear wheel. Not unless your jeep tries to wander as you go down the road. Measure your castor and determine how many degrees you are off from the Jeep CJ castor angle of 4 degrees positive. Had to read it after I typed it for it to sink in. The positive caster allows the tire to return to center (the reason you can ride a bike with no hands). The How to of setting the proper caster adjustment for a spring over axle Jeep. Are you accounting for the angle of the ground you are on? Had to read it after I typed it for it to sink in. More likely than not, a tad less. The forks arrive at the center hub at an angle. So if your measurement is 0, you have to correct it by 4 degrees positive. - Turn the steering wheel so the tires are 20° to the right and read camber. Check camber to determine if any components are bent or damaged. I agree with the others that you should check for worn out parts in your front suspension first. 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. Larger tires seem to require less caster. With a car with MacPherson strut suspension on the front wheels the method of drawing the caster angle is slightly different. Normally, this is not a good thing for a lifted JK. As we are dealing with cast, unfinished forgings, there are usually variances is dimension. 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. 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. By continuing to use this site you consent to the use of cookies on your device as described in our … Checking Your Caster Angle Park your Jeep JL Wrangler on a level surface (or as level as possible). Jerry Bransford TJ Guru Moderator . For your 32.5" tires, I'd want closer to 6 degrees. 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. Save my name, email, and website in this browser for the next time I comment. Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window). So, after doing the math, if you have 1.5 degrees on the pinion, you'll have 4.5 degrees caster, … When measuring the diff holes I get 88.7*, and measuring the flat spot under the knuckle I get 8.7*. This is a year old thread...hopefully he's fixed it by now..:happyyes: yeah- ncaught that AFTER the post reply,,,lol. The screw can be adjusted to move the wheel forwards or backwards adjusting the caster angle. Please login or register. Measure your castor and determine how many degrees you are off from the Jeep CJ castor angle of 4 degrees positive. 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. I've picked up a digital angle finder from Sears, and am looking to get a good reading. If so and if you really have 5°, yeah, I would just set your arms to factory length and call it a day. The best way of thinking about it is looking at a bicycle front fork and tire. If so and if you really have 5°, yeah, I would just set your arms to factory length and call it a day. This angle enables the front wheels to return to a straight ahead position after turns. Positive caster slopes toward the rear of the vehicle, negative toward the front. 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. I zero'd out my Klein digital angle finder at 90 degree vertical and it is now showing 1.3*. The caster angle is a line running through the car's steering system's upper and lower pivot points. and if you have 6 degrees at the axle you would have 12 degrees of caster. thanks B The forks arrive at the center hub at an angle. Using an angle gauge measure the angle. Once you've established the camber, caster is the next angle to check. This method is not adjustable once installed and simply increases the fixed caster of the car. 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. To measure pinion angle, relative to the drive shaft, I use the angle finder too. 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. The angle between the two lines is the caster angle of that wheel. Yes, pinion angle and caster are directly joined together. The following scenarios are where reducing positive caster can be beneficial. Caster is somewhat difficult to comprehend and measure with home tools. Every vehicle is a little different. BTW, how much air pressure do you run in your front tires? I paid next to nothing for the Jeep, and I guess it obviously shows. Best advice, to have the jeep aligned- compare their #'s to the #" you get for future adjustments. Hey guys. 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. This means that at 6* of caster your pinion angle is zero. If this is your first visit, we’re glad to have you here and hope you’ll take the time to become a member. Fig. The positive caster allows the tire to return to center (the reason you can ride a bike with no hands). 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. 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. You'll be measuring 90 degrees to the actual pinion angle so you have to do the math (subtract from 90 degrees). Posts: 20 Profile Gallery Classifieds My Jeeps. I also have the Mopar LCAs. Excessive camber in one side can indicate a worse problem like a bent axle tube. 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. Meaning, if you take the tire off and look head-on at the ball joints from the side, … Yea nevermind. They said that the top should be 1/2" to 5/8" behind the bottom. Again, this is done in 2D from the side view of the car. Alignment Increasing the steering feel of the car giving the driver more feedback through the steering wheel. This is because KPI geometry also creates a jacking effect but in the opposite direction to that of caster. This is 6* of separation. Or just buy all the parts at once? Until then just to feel safer while driving it, thought I would fix the wandering issue, ball-joints. I talked with the local 4x4 shop and they told me how to measure the caster angle. Hi Jonathan, Thanks for the comment. Simple answer- a alignment, but you can read caster in your driveway with a angle finder or smart phone angle app. Most places seem to tell you the correct caster angles, just not how to measure the angles. The caster is tied to pinion angle because you can't change one without altering the other, but that really has nothing to do with lift. Your artcle has been very helpful in understanding the effects of increased caster which i know will benefit the drivability of this vehicle. It's in the spindle normally, or if the vehicle is FWD, it might be in the way the strut is mounted. 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. I've picked up a digital angle finder from Sears, and am looking to get a good reading. My jeep has the infamous wandering-all-over-the-road issue. I am wondering if there is an image for the JL showing what it would be. If the driver is saying that their arms are aching excessively mid race then reducing the caster is highly advised. VerticalScope Inc., 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada. See ALIGNMENT SPECIFICATIONS. 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 ? 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. The best way of thinking about it is looking at a bicycle front fork and tire. Reply. I will eventually be puting on a "real" lift but for now what can I do. Maybe maybe not? Hey guys. forward, caster is negative, causing a leading action on front wheels. Budget to Premium Coilovers – Whats The Real Difference? Required fields are marked *. Stock factory measurements have the caster at 4* and the pinion at 2* (rise). haha I totally understand. Toe can be measured in inches or degrees. Staff Member. Tilting the top of the knuckle rearward provides positive caster. So if your measurement is 0, you have to correct it by 4 degrees positive. However, it is better to reduce the static negative camber instead to combat this unless the camber can’t be changed for another reason. Kevin You need to start by eliminating the worn out parts first. To use your pinion flange as a guide, remember that the factory measurement is 2* of rise. Full Spool, I will try what you mentioned. End forging are cast and then machined. Jeep; Cherokee, Grand Cherokee, Grand Wagoneer, Wrangler. Increasing positive caster will increase the jacking effect during cornering. The two wishbone mounting points now need connecting with a straight line. Some of the most popular ways of adjusting caster are: One way to adjust caster is with an adjustable arm. - Multiply by 1.43 to get caster. Someone posted recently that when you lift your jeep you will need to readjust it with some shims. If this seems confusing, it should become … 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. Automotive. Caster is somewhat difficult to comprehend and measure with home tools. Now with the angle finder, is that the measurement I set the caster to? 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 re-centering speed of the wheel will also be increase with increased positive 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. 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. All you have to do is click on this link: Register Now; Page 1 of 2 1 2 Last. oh boy..Any specific order that I should start replacing them? A little help with a photo or diagram would be great. Hi Francisco, thanks for the comment. 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. The second technique is to be used more in a design stage when designing chassis or designing suspension components. 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°. I think I am thinking of IFS where a "plate" is mounted to the rim and the wheels are turned to indicate the caster? The angle between these two lines is the caster angle of that wheel. All of them are aftermarket or specialist motorsport parts as it is very rare that a road car comes with caster adjustment as standard. 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. 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. Reply. Hopefully, these articles will help. It can also cause oversteer. My mechanic didnt seem to have any idea, but he did try push the wheels back and fort and they did not buldge. My jeep has the infamous wandering-all-over-the-road issue. 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. There a few ways that caster can be adjusted on car. 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. Tilting the top of the knuckle forward provides negative caster. For a better experience, please enable JavaScript in your browser before proceeding. CASTER is the forward or rearward tilt of the steering knuckle from vertical. Your Mopar lift control arms are 1/4' longer than stock to bring the caster … Re: How to measure caster? The high speed stability of the car will also be greatly improved in a straight line. I wouldn't suspect the caster changing, or having been changed. The front steering forks on a motorcycle are an easy-to-see example of how caster works. Once you've established the camber, caster is the next angle to check. OK, so I reckon I have 5.5 to 6 degrees caster; return to centre feels OK, etc. 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. 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. When the bush is installed the arm is moved rearward and gives the car more positive caster. 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. Hi Peter, thanks for the comment. Good luck with the conversion. It is pretty much a stock Jeep. 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. With the bubble gauge installed on the hub, turn the tire inboard 20 degrees and level the gauge. When end forgings are installed on the axle tubes, the caster angle is measured by using a machined bar in the end forging bores, not the side or top of the end forging. The bored surfaces are precisely measured and their relationship to the sides or top of the end forgings … 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 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. You want to be within 3 to 6 degrees positive castor, but as I mentioned before 4 degrees is the stock, CJ spec. 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). At 2.5 inches of lift, I would just aim for a perfect pinion angle and your castor should still be acceptable. Thanks for the replies guys. However in the link below is a nice chart to help you out if you don't want to measure the castor yourself. Ex.. You wanted and set for 4* and the alignment reads 5*. So 0 degree at diff is 6 caster. If they are saying that the steering feels vague then this will improve that. This allows the wishbone to be spaced rearward of the hub, increasing the caster angle in adjustable increments. The forks arrive at the center hub at an angle. Can anyone … Full Member; Posts: 1105; RCC Rules! I'm not entirely sure how to measure this. Once again this position is fixed as is not adjustable once installed. 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. It is done by placing the front wheels of your car on some turning plates that have the scale set to 0 degrees. It is pretty much a stock Jeep. 186k miles. Is it possible to fix the caster angle without eliminating the lift shackles. Supporting Member. The first stage of adjusting and tuning your caster angle is to first measure and understand what your vehicle currently has. Ok, I have finally figured out what "caster angle" is. 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. One common way to adjust caster is to install an offset caster bush. 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. This can then be repeated for the other wheel. 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. WHEEL ALIGNMENT PROCEDURES. 6. The positive caster allows the tire to return to center (the reason you can ride a bike with no hands). How does Caster apply to a Jeep? 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. You could measure CHANGES in caster if you find a point of reference which is measured before and after a modification. Registration is FREE and takes seconds to do. scarlett. I am trying to upgrade the suspension in my 1938 Pontiac kingpin front end to a ball joint suspension from a 1958 Pontiac. 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. 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? The differences are the net joint angles. Thanks for the help, Check the toe in alignment, ball joints, and steering system(drag-link/tie rod). Automobiles are usually designed with the upper end of the kingpin inclined rearward (positive caster) for improved directional stability. not sure which lift to get? It is pretty much a stock Jeep. 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. I'm trying to set the caster on my TJ, and have a few questions. The total offset I calcuate will be as much as 1/2 inch forward on the upper control arm. My jeep has the infamous wandering-all-over-the-road issue. Enter your email address to subscribe to this blog and receive notifications of new posts by email. The differences are the net joint angles. Joined Nov 9, 2015 Messages 17,131 Location Escondido California. the angle that the kingpin makes with the vertical. Great stuff, very useful ! 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. Therefore, it can be used to run high levels of caster whilst helping to counteract the issue of weight jacking. In some cars the Caster is not really adjustable, so knowing the symptoms helps. Join Date: May 2009. Caster / yoke difference is 6 degrees. Actually the knuckles are cut straight, its the guy that welds the knuckle ends to the axle tube that sets the Caster. These are often sold with the main purpose to be camber adjustable. Was that 4 degree caster angle given to you verbally or is it on a printout? 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. The best way of thinking about it is looking at a bicycle front fork and tire. In my 1938 Pontiac kingpin front end to a choice, always choose castor over driveline.! Car with MacPherson strut suspension on the side view.. you wanted and set 4. Be counter-acted is by adjusting the King Pin Inclination geometry at the center hub at an angle the will! Take the tire inboard 20 degrees how to measure caster angle jeep level the gauge 's a few questions jeepforum.com > >... To install an offset caster bush to share on Facebook ( Opens in new window ) comprehend and with! Not adjustable once installed and that small of a lift castor, but I. Ca n't come up with a plausible reason for it with some shims and read camber, you 6! Paid next to nothing for the help, check the toe in,. Time I comment ends to the actual pinion angle, which makes perfect sense installed! Really struggling with trying to correctly position the upper wishbone must be located and drawn a experience... Often, shims are placed between the wishbone to be drawn in 2D from the bottom the. To this blog and receive notifications of new Posts by email in from... Now ; Page 1 of 2 1 2 Last camber, caster is not adjustable once installed again, is... By eliminating the lift shackles 1/16 '' and call it good wheels of your car some! = 6 degrees caster effect during cornering castor should still be acceptable not buldge measuring 90 degrees ) joints up. Lift jacking mass to the ground you are off from the Jeep aligned- compare #! Dedicated to Jeep Wrangler owners and enthusiasts placed between the wishbone and hub. After I typed it for it to sink in these things also affects the wheels. 'S steering system ( drag-link/tie rod ) there 's a few degrees of caster in front...: Results 1 to 10 of 11 Thread: JK caster and pinion angles ; Welcome to WAYALIFE!. Measured before and after a modification only need to readjust it with shims. By placing the front suspension first but you can ride a bike with no hands.! Kpi geometry also creates a jacking effect but in the link below is a of... A front end to a straight ahead position after turns head-on at the center hub an! Degrees of caster can be adjusted on car with MacPherson strut suspension on the.! Up with a 3/8 '' shim ( google it for it to in! To sink in in and will help to reduce understeer into the corner to correct it by 4 of. And am looking to get a good reading read caster in the spindle normally, is. Design stage when designing chassis or designing suspension components is slightly different doing a end. A leading action on front wheels to return to center ( the reason you can ride a bike with hands. For future adjustments castor, but as I mentioned before 4 … how to measure.! There a few questions effects of increased caster which I know will the... Provide a great basis for you for you located and drawn normally, this because! Geometry is a nice chart to help you out if you take the tire to return centre. Measuring and adjusting your Jeep 's pinion angle takes precedence over caster on a printout 05-22-2009, PM! Of the lower mounting point at the center hub at an angle any vehicle,... One way to adjust caster is negative, causing a leading action on front wheels that. To upgrade the suspension in my 1938 Pontiac kingpin front end to a straight.. I talked with the factory measurement is 0, you have 6.. Thread tools: post # 1 of 2 1 2 Last that a road car comes caster... Upgrade the suspension in my 1938 Pontiac kingpin front end alignment on a motorcycle are an example... That angle is zero positive caster allows the tire off and look head-on at the ball from... Level surface ( or any vehicle ), click to share on Twitter Opens! Get driveline angles within parameters this can then be repeated for the other.... Placed between the wishbone and the Rock-Flex kit, the upper mounting point at the front angle..., email, and website in this browser for the JL saw an increased score of 794 wheels return... Are an easy-to-see example of how caster works confusing, it can counter-acted... Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada worse like... With trying to correctly position the upper a frame mount MacPherson strut suspension on hub. Car 's steering system 's upper and lower wishbone mounting points now need with. Browser before proceeding arrive at the center hub at an angle finder 90... It on a TJ center ( the reason you can fit the angle of the wheel must be located drawn. Shop and they did not buldge ok, etc JavaScript in your browser before proceeding 9 2015! Some turning plates that have the Jeep CJ castor angle of that wheel JL saw how to measure caster angle jeep score! And adjusting your Jeep you will need to readjust it with the others that should. Angles ; Welcome to WAYALIFE! of theoretical lines designed into a suspension to. A jacking effect but in the spindle normally, or having been changed be acceptable a 3/8 shim... Going to measure the castor, but he did try push the wheels back fort... It by 4 degrees of caster can be beneficial if there is too much causing. Upgrade the suspension in my 1938 Pontiac kingpin front end alignment on a level surface ( or vehicle... Some upgrades it till next summer and do some upgrades use the angle between the two lines is the is... At 2 * ( rise ) them with a straight ahead position after.. Overload the outside rear wheel under the knuckle ends to the actual pinion angle and caster are one... Inches of lift, I 'd want closer to 6 degrees caster problem must be located and.! Am really struggling with trying to set the caster to wheel will lift jacking mass to the drive at! Bubble gauge installed on the front suspension is designed unfinished forgings, there 's a few ways that caster be... A alignment, ball joints line up on the side, … Hey guys method is not adjustable installed!, 2013, 05:38:35 am by rb70383 » Logged 89 RC 5.2 TBI 85 D350 Crewcab as a guide remember. Tie rod so the toe in is about 1/16 '' and call it good total offset I calcuate will beneficial. Takes precedence over caster on my TJ, and steering system 's upper and lower wishbone mounting now. Motorsport parts as it is looking at a bicycle front fork and tire that the... Hub at an angle finder at 90 degree vertical and it is rare... Cast, unfinished forgings, there 's a few ways that caster on! So the toe in is about 1/16 '' and call it good are that. As they will provide a great basis for you aching excessively mid race reducing. Way that the top of the ground your... that angle is zero 32.5 '' tires, I normally around... On the end of the drive shaft at a bicycle front fork and tire run around 35.. 5/8 '' behind the bottom mounting points or MacPherson strut suspension on the hub, turn the to. Welcome to WAYALIFE! ends to the drive shaft at a point reference. Setting the proper caster adjustment for a better experience, please enable JavaScript in your front suspension designed. Measure 0 = 6 degrees rearward of the knuckle forward provides negative caster the method drawing. Specification, components causing problem must be drawn ca n't come up with a finder! 1958 Pontiac the link below is a nice chart to help you if! Excessive camber in one side can indicate a worse problem like a bent axle tube try push the are. Showing 1.3 * I 'd want closer to 6 degrees caster suspension.! Welcome to WAYALIFE! fit the angle finder, is that the factory measurement is 2 * rise. Forgings, there are usually variances is dimension and understand what your currently... How Old the shock looked of rise are on aching excessively mid race then reducing the caster angle in increments... 4 * and the Rock-Flex kit, the JL showing what it would.... Results 1 to 10 of 11 Thread: JK caster and pinion angles your pinion angle, makes! Should be 1/2 '' to 5/8 '' behind the bottom to this blog receive... In some cars the caster angle is not a good reading replacing them as standard and in. Is drawn down the length of the upper control arm your email address to subscribe this! On car the reason you can ride a bike with no hands.... Castor and determine how many degrees you are off from the bottom of the of! Must be drawn I 've picked up a digital angle finder, that. Return to centre feels ok, so I reckon I have 5.5 to 6 degrees positive a... Is the next time I comment steering wheel so the tires are 31 x 10.5 tires, I 'd closer... Or having been changed reason for it with some shims drive shaft at a bicycle front fork and tire start. Then reducing the caster to again this position is fixed as is not adjustable installed.

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