TheMayer

What I'm working with at the moment:
01 XJ
LP D30
~4" of lift: OME springs/shocks, ~1" spacers/shackles
1" t-case drop (not ideal, I know, but a SYE will have to wait a while)
IRO double shear track bar
IRO Adjustable upper and lower arms
IRO Tie rod
IRO extended sway bar links
30x9.5 BFG AT's

After putting the lift on, I battled serious DW and finally won with the help of IRO parts. Once DW was cured I noticed some bad driveline vibes so I'm running without a front driveshaft until I can get it figured out.

I went to the dealer and got a road force balance and alignment done and the numbers on the sheet seem to be incorrect (from what I've been reading from you guys) for a lift of my height. I am far from an expert on this stuff, so I'd really appreciate some second opinions of the numbers. Thanks in advance!

jbsjunk

The numbers look fine to me. I use the same system at work. I'm just surprised that the castor is that high. What looks wrong?

TheMayer

I was thinking the caster is too high so my pinion angle must be terrible (I'm assuming thats whats causing my driveline vibes).

holycaveman

I run around a 9 degree castor with no vibes what so ever in the front.

jbsjunk

If it's a LP, then it may be a fuzz high. Shouldn't be a issue on a HP. I normally see 3-5' with no problems but I like it closer to 5'.

93XJLI

holy poop that thing must be all over the road

TheMayer

What would be the ideal caster angle to keep the driveshaft happy, but not induce death wobble? If that is even possible with 4" of lift.

XJmike0122

A lot of guys post this link. http://go.jeep-xj.info/HowtoAlignment.htm
I'm still trying to learn but seem like around 5 - 5.5 degrees.

TheMayer

That's a good site! I guess the only way to know what my rig is happy with is trial and error, I'll get it set to 5 and see how it goes