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If you’ve just installed a brand new lift on your Jeep JL Wrangler and are wanting to get it aligned, there are a couple of things you should know before you take it to a shop and pay to have it done. First, unless you’ve installed new aftermarket components such as an adjustable track bar and/or adjustable control arms, there really isn’t a whole lot a shop can to other than recenter your steering wheel and take your money. Due to the design of the JL steering system, your toe-in will not change at all and being that it comes with a solid front axle, its camber will not change either. Depending on how much lift you install, your caster may be off enough to feel it but again, nothing can be done unless you’ve installed aftermarket components that will allow you to make adjustments. Second, even if you have installed a 2″ lift or taller and added adjustable components, doing a basic front end alignment is easy, something you can do in your own driveway, with the use of some basic tools and this write-up will show you how.
Alignment Topics
Steering Wheel Re-centering
Front Axle Re-centering
Setting Caster
Setting Toe-In
Steering Wheel Re-centering
Front Axle Re-centering
Setting Caster
Setting Toe-In
Jeep Tech; Jeep CJ, YJ and TJ. If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. Jan 07, 2019 The JL Wrangler with stock suspension and street tires scored 640 on the 20-degree RTI ramp. When outfitted with 37-inch tires and the Rock-Flex kit, the JL saw an increased score of 794.
What You Will Need
• 15,18,21,24mm Socket & Wrench
• Ratchet
• Large Crescent Wrench
• Angle Finder
• Tape Measure
• Carpenters Level
• Floor Jack
• Jack Stands
• 15,18,21,24mm Socket & Wrench
• Ratchet
• Large Crescent Wrench
• Angle Finder
• Tape Measure
• Carpenters Level
• Floor Jack
• Jack Stands
Alignment Definitions
The following are common wheel alignment definitions as defined by Jeep and that you will need to be familiar with:
The following are common wheel alignment definitions as defined by Jeep and that you will need to be familiar with:
CASTER is the forward or rearward tilt of the steering knuckle from vertical. Tilting the top of the knuckle rearward provides positive caster. Tilting the top of the knuckle forward provides negative caster. Caster is a directional stability angle. This angle enables the front wheels to return to a straight ahead position after turns.
CAMBER is the inward or outward tilt of the wheel relative to the center of the vehicle. Cleanusbdrive 1 2. Tilting the top of the wheel inward provides negative camber. Tilting the top of the wheel outward provides positive camber. Incorrect camber will cause wear on the inside or outside edge of the tire. The angle is not adjustable, damaged component(s) must be replaced to correct the camber angle.
Progecad architecture crack for gta. WHEEL TOE POSITION is the difference between the leading inside edges and trailing inside edges of the front tires. Incorrect wheel toe position is the most common cause of unstable steering and uneven tire wear. The wheel toe position is the final front wheel alignment adjustment.
STEERING AXIS INCLINATION ANGLE is measured in degrees and is the angle that the steering knuckles are tilted. The inclination angle has a fixed relationship with the camber angle. It will not change except when a spindle or ball stud is damaged or bent. The angle is not adjustable, damaged component(s) must be replaced to correct the steering axis inclination angle.
THRUST ANGLE is the angle of the rear axle relative to the centerline of the vehicle. Incorrect thrust angle can cause off-center steering and excessive tire wear. This angle is not adjustable, damaged component(s) must be replaced to correct the thrust angle.
Alignment Diagrams
Diagram from Jeep JL Wrangler Factory Service Manual.
Diagram from Jeep JL Wrangler Factory Service Manual.
Disclaimer: Utmost care should be taken when modifying anything to your suspension. Injury to you, your Jeep, and/or others can result from improper suspension modifications or alterations. The author is not a certified mechanic and assumes no responsibility for damage or injury.
Caster is the tilting of the uppermost point of the steering axis either forward or backward (when viewed from the side of the vehicle). A backward tilt is positive (+) and a forward tilt is negative (-). Caster influences directional control of the steering but does not affect the tire wear and without adjustable control arms, is not adjustable on this vehicle. With too little positive caster, steering may be touchy at high speed and wheel return-to-center may be diminished when coming out of a turn.
As you can see by the drawing, stock caster to pinion angle separation is 6*. This is represented as the pinion at 0* (zero rise) or 90* at the pinion flange face and the caster set at 96*. If we were to rotate the pinion up to stock JK position, the pinion would be tilted up 2* and caster angle now would be 94*. In alignment terms, this is known as 4* of caster. A stock JK has 4* caster and 2* of pinion up tilt for a total of 6* of separation.
Most lift kits (see note 1) change the caster and pinion angle when they are installed. This is to prevent drive shaft vibration and transfer case damage. Many kits feature adjustable control arms. When a lift kit is installed, the owner frequently complains of touchy steering. As mentioned above, this is due to too little caster. This is where adjustable control arms will help. With these you can remove a little of the added pinion up tilt to help get your caster and steering a bit closer to stock.
https://ameblo.jp/compstomropo1978/entry-12634647219.html. There are a number of proper, appropriate ways to measure caster angles. Only 2 can be done with a fully assembled front end housing. First, and most obvious, is with an alignment machine. Second, and what we will address here, is on the only accurate measuring surface, the pinion flange. It has been said that you can get a measurement off of the end forgings (or ‘C’) but this is incorrect. End forging are cast and then machined. 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. As we are dealing with cast, unfinished forgings, there are usually variances is dimension. The bored surfaces are precisely measured and their relationship to the sides or top of the end forgings may vary.
On the JK, measuring the pinion angle is a simple exercise in deductive reasoning. We know there is 6* of separation. By using a simple angle finder, we can measure the pinion angle at the drive shaft flange (where the angle reads 0 on the above drawing). You’ll want to zero the angle finder first to compensate for ground that may not be level. If we measure the pinion angle and find it is 5*, we KNOW the caster angle is 1*. If the pinion angle reads 4*, we KNOW the caster is at 2*.
How To Measure Caster In Jeep Jl 6
When adjusting control arms for proper caster, many users adjust just the upper or just the lower. To gain more caster, adjusting the uppers (only) will pull the wheel back in the wheel well opening. Adjusting the lowers (only) will push the wheel forward in the opening. Quick easy ftp server professional version 3.2 crack. Ideally, adjusting both upper and lower is the best option as the wheel is placed properly in the wheel well. When adjusting for better caster angle it is crucial to keep an eye on the pinion to driveshaft angle. Remember, the lift kit companies have changed the caster to keep proper (or close) driveshaft to pinion angles. Keeping these angles in their proper location prevents driveshaft vibration and potential catastrophic transfer case failure.
Any adjustment you make should be minimal. Installing a 4� lift and trying to get back to 4* of caster almost guarantees a quick failure of a driveshaft, transfer case bearing or the entire transfer case. Depending on your lift, getting back to 1 or 2* of caster may be a huge success and make a significant difference in the handling of your JK. Anytime you have adjusted control arms it is a good idea to get a 4 wheel alignment. Kingdom rush frontiers hd 1.4. Using control arms of equal length (side to side) is a very important to keeping the Jeep tracking straight. An alignment can make small corrections that will make a huge difference in tracking.
As was mentioned earlier, the stock JK caster angle is 4*. This is a very slight angle by most standards. Many builders use 6-7* as their standard caster. Having more caster than stock is not uncommon when using an aftermarket axle housing such as a ProRock 44 Unlimited. The ProRock 44 Unlimited is designed with 4* of extra caster. This allows users to dial in their pinion correctly and retain factory caster angles (or better). With this housing you will measure as done with the stock housing but use 10* of separation. If your pinion angle is 4* you have 6* of caster. If you have 5* of pinion angle, you have 5* of caster.
For more information about ProRock 44 specifications, click on the link below:
http://www.dynatrac.com/pdfs/ProRock%20FAQ_revK.pdf
http://www.dynatrac.com/pdfs/ProRock%20FAQ_revK.pdf
How To Measure Caster In Jeep Jl 5
To help understand the differences between the standard ProRock 44 and the Unlimited version, click on this link:
http://www.dynatrac.com/pdfs/Choosing_the_right_housing_revC.pdf
http://www.dynatrac.com/pdfs/Choosing_the_right_housing_revC.pdf
— Scott Frary, Dynatrac