Had an alignment done on my 2000 TJ (with a 2 inch lift and 32x11.5x15 tires). They stated the castor was 4.5 and they changed it to 6.6 and 6.2 stating the specs call for a caster of 7. Upon reading a few posts I see that this may be incorrect. Can anyone verify what the caster should be and check the printout I received from the alignment. Many thanks!
TJ stock caster spec is 7° +/- 1°, so your 6.6° and 6.2° is fine. You will automatically loose a little caster if you increase spring height without lengthening your lower control arms, and I'm assuming you have stock fixed CA's.
Normally when taller lifts are used, caster is set in the 5° range. Since I tow my Jeep behind the rv, I like a little extra caster. The more the caster angle, the better the Jeep will track and the faster steering will return to center.
I had mine 04 TJ aligned today, the driving has been very swimmy. the caster started out at 3.7" for both sides and ended up 3.8".
My wife took it so I haven't spoken to the tech....but the sheet he gave her shows it should be between 6 and 8".
how can I get more Caster? everything else came up in spec.... will this amount off screw up the driving?
The caster angle is not especially critical, you just need enough so there is good steering wheel return-to-center after completing a turn. 4.5 is a tad light but it's not a problem. However, I am VERY curious how they increased your front axle's Caster angle up to 6.2 and 6.6. With a stock TJ newer than about 1999, there is no factory installed method that can be used to adjust the Caster angle. Were they pulling your leg or do you have aftermarket control arms or aftermarket control arm cam bolts installed?
.25 toe-in is a tad excessive, .15 is the recommended toe-in angle.
You can easily and accurately set your own toe-in in 15-20 minutes with nothing more than a tape measure, wrench, and a big set of pliers. Done with just normal care your toe-in results will literally be every bit as accurate as can be done with the latest laser alignment rack. Interested?
__________________ ...Gone wheeling, back Sunday night.