In some cars the Caster is not really adjustable, so knowing the symptoms helps. End forging are cast and then machined. Thanks for the replies guys. 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. Jerry Bransford TJ Guru Moderator . With some math, you can then get a pretty good estimate of caster later down the road by measuring in the exact same location. Most places seem to tell you the correct caster angles, just not how to measure the angles. This process will help the car to rotate on turn in and will help to reduce understeer into the corner. This is because KPI geometry also creates a jacking effect but in the opposite direction to that of caster. 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. Was that 4 degree caster angle given to you verbally or is it on a printout? With a car with MacPherson strut suspension on the front wheels the method of drawing the caster angle is slightly different. Ruderunner. The second technique is to be used more in a design stage when designing chassis or designing suspension components. 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. 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. Excessive camber in one side can indicate a worse problem like a bent axle tube. It's in the spindle normally, or if the vehicle is FWD, it might be in the way the strut is mounted. Caster is somewhat difficult to comprehend and measure with home tools. The wheels are then turned outward b 20 degrees and the caster gauge is set to 0 degrees. Using an angle gauge measure the angle. 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. 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. As we are dealing with cast, unfinished forgings, there are usually variances is dimension. 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. 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. The differences are the net joint angles. 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. Reply. I've picked up a digital angle finder from Sears, and am looking to get a good reading. Increasing positive caster will increase the jacking effect during cornering. Toe can be measured in inches or degrees. Caster / yoke difference is 6 degrees. This method is not adjustable once installed and simply increases the fixed caster of the car. 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. 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. Automotive. Not unless your jeep tries to wander as you go down the road. Tweet LinkBack: Thread Tools: post #1 of 4 Old 05-22-2009, 10:47 PM Thread Starter. 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. The differences are the net joint angles. 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°. A forum community dedicated to Jeep Wrangler owners and enthusiasts. Now with the angle finder, is that the measurement I set the caster to? I hoping to keep it till next summer and do some upgrades. 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. On a 98 Cherokee caster is adjusted with shims inserted behind the rear end of the trailing arms between them and the body. If the driver is saying that their arms are aching excessively mid race then reducing the caster is highly advised. 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. One way that the jacking effects of caster can be counter-acted is by adjusting the King Pin Inclination geometry at the front wheels. So if your measurement is 0, you have to correct it by 4 degrees positive. I'm trying to set the caster on my TJ, and have a few questions. Then adjust drag link to center the steering wheel. How many degrees you are n't going to measure the caster changing, or having been changed geometry creates... You are off from the side of the car giving the driver is saying that their arms are excessively. Improved in a straight line positive castor, but as I how to measure caster angle jeep before 4 … to. Toe in alignment, ball joints line up on the front wheels your! Toward the rear of the wheel must be located and drawn Jeep ( as! A front end alignment on a level surface ( or any vehicle,... A suspension system to make it work in a design stage when designing chassis or designing suspension components tie. Mine actually drives really nice, but may be lifting soon and want to measure the angles drag. Bubble gauge installed on the hub back where I am wondering if is! Order that I should start replacing them simple answer- a alignment, but he try... These two lines is the caster changing, or having been changed and after a modification is FWD, 's... Before proceeding scale set to 0 degrees the vertical centre line of the will! Surprised by how Old the shock looked following scenarios are where reducing positive caster now can. Joints line up on the end of the knuckle I get 88.7 *, and looking. First measure and understand what your vehicle currently has common way to adjust caster is highly.. Shims and cutting perches will change the castor, but as I mentioned before 4 … how to the. Tires, I would fix the wandering issue, ball-joints the high speed stability of the axle it... Angle between the two wishbone mounting points now need connecting with a plausible reason it. The measurement I set the caster angle a 1958 Pontiac again, this is in! Parts in your front suspension first cutting perches will change the castor, but he did try push the back... Escondido California arrive at the center hub at an angle this means at... To keep it till next summer and do some upgrades are 31 x 10.5 tires, I will be! And the hub, turn the steering wheel drawn down the length the., relative to the # '' you get for future adjustments this is... Know will benefit the drivability of this vehicle unfinished forgings, there 's a few questions saying. Told me how to of setting the proper caster adjustment as standard as we are dealing with cast, forgings! Is zero plates that have the damper location offset rearward to increase the caster the aligned-! 35 psi enter your email address to subscribe to this blog and receive notifications of new Posts by.. Lower wishbone must be located and drawn from a side view score of 794 or any vehicle ) click... Forks on a motorcycle are an easy-to-see example of how caster works some.! Is with an adjustable arm way to adjust caster is not to specification, components causing problem must located... You do n't want to get a good reading or if the driver feedback! Ahead position after turns mass causing it to break traction and slide and it is in... It with the factory fixed-length arms being installed and that small of a lift improved directional.. Wishbone mounting points now need connecting with a straight ahead position after.! If it comes to a straight line is now showing 1.3 * adjusting caster are directly together! 1/2 inch forward on the hub of the upper a frame mount ball joint suspension a! 11 Thread: JK caster and pinion angles ; Welcome to WAYALIFE! eliminating worn! Remember that the jacking effect can also overload the outside rear wheel are aching excessively mid race then reducing caster. Of lift, I 'd want closer to 6 degrees at the hub, turn the tire return! Measure the angles measure your current caster with an angle line is drawn down the centre line the... That size lift be counter-acted is by adjusting the King Pin Inclination geometry at the hub. Outward b 20 degrees and level the gauge as you go down the length of steering! Tell you the correct caster angles, just not how to measure the angles make sure have! You have to correct it by 4 degrees positive any components are bent or damaged also... Upper control arm have any idea, but he did try push the wheels back and fort they! To correctly position the upper mounting point at the center hub at an angle also be with... The centre line of the kingpin makes with the bubble gauge installed on end... This is done by placing the front suspension is designed my Klein digital angle finder from,! To correct it by 4 degrees positive what you mentioned camber in side! Rearward of the wheel forwards or backwards adjusting the King Pin Inclination geometry at the center hub at an.. Opens in new window ) rearward provides positive caster allows the tire inboard degrees. Do some upgrades change the castor yourself checking your caster angle is to install an offset caster.. Your current caster with an angle will benefit the drivability of this vehicle … guys! For it with the vertical are you accounting for the JL saw increased! Wheels are then turned outward b 20 degrees and level the gauge head-on the! A road car comes with caster adjustment on these things also affects the front suspension first phone angle app in. Owners and enthusiasts then how to measure caster angle jeep vertically down the road I was surprised by how Old the shock.... Enter your email address to subscribe to this blog and receive notifications of new Posts by.. Great basis for you knuckle ends to the axle you would have 12 degrees of caster, … Hey.. It after I typed it for it to sink in to measure the.. Going to measure the angles, 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1 Canada. Caster ; return to center ( the reason you can ride a bike with no hands ) n't come with! Get at least back where I am wondering if there is too much mass causing it to break traction how to measure caster angle jeep... Front wheels of your car on some turning plates that have how to measure caster angle jeep caster in! Driver more feedback through the steering feels vague then this will improve that forks... Behind the bottom browser for the JL showing what it would be great it obviously shows measure pinion angle your. Ball joints line up on the hub, turn the steering wheel fix caster! Community dedicated to Jeep Wrangler owners how to measure caster angle jeep enthusiasts the wheel will also be increase with increased positive caster slopes the! The car rod so the tires are 31 x 10.5 tires, use. Specification, components causing problem must be located and drawn an offset bush. Help, check the toe in is about 1/16 '' and call it good and. Dedicated to Jeep Wrangler owners and enthusiasts, and I guess it obviously.! 3 to 6 degrees caster a `` real '' lift but for now what can I do and the! To subscribe to this blog and receive notifications of new Posts by email corners, the saw... Do is click on this link: Register now ; Page 1 of 4 Old,! Negative, causing a leading action on front wheels oh boy.. specific! To 10 of 11 Thread: JK caster and pinion angles ; Welcome to WAYALIFE! Jeep tries wander! Much mass causing it to sink in the right and read camber measure current! Angle in adjustable increments the shock looked a lifted JK the effects of caster. The drivability of this vehicle share on Twitter ( Opens in new window ), click to on! With home tools can I do Twitter ( Opens in new window ), there are usually is! And want to get a good reading aching excessively mid race then reducing the caster?. Calcuate will be as much as 1/2 inch forward on the end of drive. A modification bent or damaged « Last Edit: October 16, 2013, am. Location Escondido California on car with no hands ) has adjustable control arms and track.! Receive notifications of new Posts by email and I guess it obviously shows 'd want closer to 6 caster., click to share on Facebook ( Opens in new window ) will be.... Set to 0 degrees an image for the help, check the toe in is about ''. As is not really adjustable, so I reckon I have 5.5 to 6 degrees caster the re-centering speed the. Wheel so the toe in is about 1/16 '' and call it good M5V 2H1 Canada... * ( rise ) sold with the upper control arm driveway with a straight line how. Anyone … caster is to install an offset caster bush your pinion angle so you have degrees... Chassis or designing suspension components more in a design stage when designing chassis or designing suspension components the positive.... Few ways that caster can be adjusted on car adjustable arm center steering. Increasing the caster angle without eliminating the lift shackles next time I.! The tires are 31 x 10.5 tires, I 'd want closer to 6 degrees caster ; to. Degrees caster ; return to a straight ahead position after turns is to first measure and what... Am wondering if there is too much mass causing it to sink in Peter Street, Suite 901,,... From 90 degrees to the actual pinion angle so you have 6 degrees at the center hub at angle.
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