I agree with having clearance issues by legthening wheelbase that much, I wanted to lengthen my fronts as much as possible but had to limit it cause of clearance issues with Currie springs hitting Synergy Tracbar/sector shaft brace during up travel. My castor is set at 4.5* and it drives great down the hwy even at 80 though I kep it closer to 70 most he time, I've never heard of less on one side for crown in road.

Big Ron...
I've done my entire alignment by myself in my driveway, if you were closer to Mickey Mouse, I'd lend a hand. You have a 2 or 4 door? It's been said the Fox ATS Steering Stabilizer really helps with the wondering on a 2dr.

 

Rear toe?? There is none on a jk

 

Sure, I made it up.

The actual angle of each wheel is obviously fixed. Let's assume they are perfectly straight (I.e. 0* of toe). Let's say I put all adjustable arms on the rear of your jeep and on one side I set the arms 1/4" longer than the other side. Put it on an alignment rack and it shows rear toe as one side being negative and the other positive. The arms need to be adjusted so that the toe relative to the vehicle is set back to 0.

If a person gets adjustable rear arms, the toe is the measure that needs to be adjusted so both sides are equal (I.e. Rear axle is perfectly perpendicular to the frame).

I'm pretty much a newb, so I'm sure you're right though. Hopefully, people listen to you and not me.

 

Just passing by....
Actually I just learned something. I would not have put that term together with what you decribed here without your details. Thanks.

 

Are you talking about caster? Tie rods change camber not caster.

 

Incorrect. Tie rods adjust toe, control arms adjust caster. In the case of the JK, camber is not adjustable unless you use offset ball joints.

JKs run a negative toe in the front (tires point inward, not straight ahead). The tie rods job is to adjust that measurement and keep it where you set it.

In the case of the JK, rear total toe is not adjustable (as noted in my previous post). However, individual rear toe is (taking from one side and giving to the other). It is alignment terminology for getting a straight rear axle.

 

So why are you talking about control arms changing toe then.

 

That was explained in post #23. Whether Toe is or is not the correct term doesn't matter. The OP has a full set of arms, so he (or the alignment shop) can ensure proper alignment of the rear axle in relation to the frame.

 

I'll try one more time to explain.

Assume the frame of the Jeep has a straight line running through it back to front. During an alignment there are 3 toe specs that are produced for front and rear: left toe, right toe, total toe. So, each value is relative to the straight line. Let's say right front is -.1 and left front is -.12, total is -.22. What it is also saying is that relative to the straight line, right front is pointed in .10 degrees and left is pointed in .12 degrees. The difference between the two doesn't matter in the front (assuming small values like in this example). When you drive straight, they are equal. When you adjust the tie rod, you adjust TOTAL toe.

Let's now say that the rear axle has a total toe of 0 degrees. That means that the wheels both point straight ahead (perfectly parallel to the imaginary line we drew). When you add adjustable rear arms, you have the ability to inadvertently push or pull one side more than the other. Let's say I accidentally set the upper and lower driver rear arms one turn longer. The result would be an axle that is no longer perpendicular to the imaginary line. How is that measured? Rear toe. It's like pinion angle vs. caster, it's a zero sum relationship, but an important one. If the toe of the driver rear is .10, then the passenger rear is -.10. The total toe can't be changed, but the individual toe can be.

You'd never visually be able to tell if the axle is pointing straight ahead. Toe is how you measure the angle of the rear tires going straight ahead. I can almost guarantee that most people never check it and is almost definitely off a little.

If this still doesn't make sense, look at an alignment sheet printout and stare at the rear toe readout until it makes sense.

 

In some sense, although not a lot, the jeep could be driving down the road sideways if the rear total toe is not correct.