I have been having more vibrations lately that I think I have figured out but need a little help. I put a 3 inch lift on 2000 xj 4.0 and a hack and tap sye, since I was getting vibes. Well after I aligned my pinion within 1.5 degrees lower and got the same vibration. just slightly. Well it is getting worse. I tried dropping front shaft and no help. The vibrations start at 50 mph and continue to 75 mph, that is as fast as I go.

Today I put the rear on jack stands and saw a wobble in the drive shaft. I then took the rear shaft out and I heard what sounded like marbles in my transfer case from rear of it. It also clicks a little.

What is this and could this be causing my vibrations? Any help would be great. Drive shaft is one I just got from iron rock off road, re manufactured front shaft. I tried putting front shaft in it but it was even worse.

Thanks, Phil

 

The u joints in both shafts are still good right? No play at all?

 

Ya I checked that and no play it is a rebuilt shaft all spicer joints. Could this be from a drive shaft not balanced?

 

Drained the TC to check fluid? I'd guess the shafts are good to go.

 

Drained the fluid and nothing. I am going to get the drive shaft balanced soon, so we will see.

 

Just moved the drive shaft up front and got the similar vibes, just not as bad and in the front nothiing in the back. Thinking it is drive shaft? Any help before I spend more money

 

i had the same thing and my problem was i apparently pulled the shaft to hard at one piont and it "unfased" the d/s . is wear the spline comes apart and gos back together into a different groove . wich then the d/s is totally unbalanced . spend the $$ getter checked out . goood luck !!