There is a cam bolt kit made for the front axle that allows the caster angle to be adjusted slightly. IIRC its range of adjustment is only something like +/- 1.5 degrees. but it might do the trick. Otherwise a pair of adjustable length arms would be the way to go.
TJs used to come with those cam bolts in '97 to mid-99 model years.
Looks like this...
View attachment 47710
With only a 2" lift it's doubtful your caster angle is low enough to cause that problem. My bet is your toe-in angle is perhaps a little excessive. There's an easy do it yourself alignment thread here in the forum on how to easily measure and set it at https://wranglertjforum.com/threads/how-to-align-your-jeep-wrangler-tj.85/My TJ (1997) has those cam bolts. I need to max out it and see if it improves my steering feel. Currently if feels unstable at highway speeds after 2in spring spacers and 31inch tyres.
Can someone tell me what direction I should turn that bolt to increase the caster angle?
Hi Jerry, I have adjusted the toe in angles following that thread to be about 1/16th ish. But that didn't solve the issue. My steering doesn't fully return to center as well, I need to center the last bit manually.With only a 2" lift it's doubtful your caster angle is low enough to cause that problem. My bet is your toe-in angle is perhaps a little excessive. There's an easy do it yourself alignment thread here in the forum on how to easily measure and set it at https://wranglertjforum.com/threads/how-to-align-your-jeep-wrangler-tj.85/
The factory toe-in angle is still appropriate, 5-6 degrees caster angle will be fine for your 33" tires. 7 degrees is the factory caster angle for the smaller factory size tires but bigger diameter tires don't require as much caster angle. As close to 6 degrees as you can get will be fine. It's not possible to obtain 7 degrees after installing much of a suspension lift without cutting the welds holding the inner C, rotating it, and rewelding it.
You truly have the Holy Grail of TJs to have those specs you claim together with even having had wander with 5-6 degrees of Caster with a tire size typical for that much suspension lift and requiring 7 degrees to eliminate it, no front driveshaft vibrations at 7 degrees with a 4" lift, etc. Must be that it's an export model.This might be an old post but I'm sorry I have to disagree with that. I have a 4" lift on my jeep Tj ..I am running 7° of caster and my pinion angle is absolutely spot on with a prop, I haven't had to cut the tubes and I can achieve between 5 and 8゚ without having to touch the tubes..I have 0" vibrations, and I run 33" tyres and with 5 to 6° she Wondered But as soon as we took it to 7 she drove straight as an Needle.. Steering geometry depends on a number of things and not everybody can run with set figures, you have to adjust Small increments at a time and test on the road till you find the sweet spot.
You truly have the Holy Grail of TJs to have those specs you claim together with even having had wander with 5-6 degrees of Caster with a tire size typical for that much suspension lift and requiring 7 degrees to eliminate it, no front driveshaft vibrations at 7 degrees with a 4" lift, etc. Must be that it's an export model.
I guess it matters more who makes the suggestion than whether or not the information is viable.
You truly have the Holy Grail of TJs to have those specs you claim together with even having had wander with 5-6 degrees of Caster with a tire size typical for that much suspension lift and requiring 7 degrees to eliminate it, no front driveshaft vibrations at 7 degrees with a 4" lift, etc. Must be that it's an export model.
You truly have the Holy Grail of TJs to have those specs you claim together with even having had wander with 5-6 degrees of Caster with a tire size typical for that much suspension lift and requiring 7 degrees to eliminate it, no front driveshaft vibrations at 7 degrees with a 4" lift, etc. Must be that it's an export model.
Its likely he has 9 degrees or more- the exchange rate with Europe affects everything. He spelled tires wrong too. He must be tyred.
It's actually talk to text As I I'm Parshley blind in one eye ..so I do Apologise,I didn't realise you were so critical of other peoples mistakes. And if making fun of them is what gets you off I think I look elsewhere
I'm running somewhere between 2-3° of caster right now with very few issues. Not much return to center, but it is quite easy to whip the wheel around. Just means you don't want to take both hands off the wheel at freeway speeds.
As long as your scrub radius isn't zero or positive, it's not going to cause a whole lot of issues.
I'd like to chop and weld the inner knuckles but haven't had the time yet.
It's actually talk to text As I I'm Parshley blind in one eye ..so I do Apologise,I didn't realise you were so critical of other peoples mistakes. And if making fun of them is what gets you off I think I look elsewhere