Originally Posted by cbenez1
An SYE is the way to go and(especially if you plan on going higher in the future) would definitely cure it but that is a more involved and expensive solution. The shims are cheaper and easier but they will only do so much They all (XJ's) react differently to angle changes. My 91 is at 5.5/6 inch lift in the rear and has no issues with out an SYE. But I did change the pinion angle when I installed an 8.8 ford diff/1 inch t-case drop and its a manual trans. For whatever reason the manuals seem to be a bit more tolerant with driveshaft angles. Having said all that if I go any higher with the 91 I will definitely need an SYE. I just did bastard pack rear springs in my 2001 XJ last week for a about a 4 inch gain. This combo had a little noise/vibe when I test drove it. I then added 4 degree shims to the pack which took the noise away almost 100%. I figure a 1 inch t-case drop will take care of it completely so I'l be making and installing one this week. I know this alot read but hope it helps.
No this is perfect. After all the discussion on what could cure the problem, I see the options so pros and cons is where I am at right now.
I am at a 3" lift right now and that is as high as I want to go. I am thinking shims is the way to go.
I've seen 2, 4, and 6 degree shims. Which angle is the one I am correcting so I know which to get?