b2kerjake
New Member
04' KJ 4x4 with the NV3550
Two months ago I had a new clutch installed in my 04 KJ by the dealer. After I got it back I noticed (among other larger problems) a vibration which occurred when I left the transmission in gear and decelerated at highway speeds - say 65-45mph in overdrive, and city street speeds, though less noticeable.
Subsequent to this (at the end of June), the pinion bearing went in the 8.25. After my horrible dealership service experience with the clutch I decided to do the work I am capable of myself, I used to own a modded TJ on which I did all my own fab, and maintenance work, I just hadn’t had the time more recently to do my own work.
I ended up pulling the differential in my driveway, and having it rebuilt at a quality local shop. I put the rebuilt differential back in last week, along with a rear UCA since the salt in upstate NY does a number on suspension parts, rear LCA’s were replaced per the recall. I also did both U-joints on the rear driveshaft. When I pulled the rear driveshaft I found the output shaft was dry after it left the dealer, so I greased that up thinking that might solve my vibration issue.
I put the rear diff back in, tightened everything to spec per the FSM and I’m driving the jeep again. I still have the same vibration on deceleration while in gear. When I did the U-joints I found one of the caps slid into the yolk a lot easier than the rest. Could this be the source of my vibration? I checked the U-joints after a highway drive, the caps were hot, but no single cap was any hotter than the rest.
Could the dealer have mis-indexed the shaft when they did the clutch, their attention to detail was poor on the rest of the work. How important is re-installing the DS aligned to the same point on the TC end and rear diff end? I made sure to mark both ends when I did the diff. Would adjusting either end a quarter or half turn reduce the vibration?
I think my next step might be a (rebuilt or low mile junkyard) rear driveshaft.
Two months ago I had a new clutch installed in my 04 KJ by the dealer. After I got it back I noticed (among other larger problems) a vibration which occurred when I left the transmission in gear and decelerated at highway speeds - say 65-45mph in overdrive, and city street speeds, though less noticeable.
Subsequent to this (at the end of June), the pinion bearing went in the 8.25. After my horrible dealership service experience with the clutch I decided to do the work I am capable of myself, I used to own a modded TJ on which I did all my own fab, and maintenance work, I just hadn’t had the time more recently to do my own work.
I ended up pulling the differential in my driveway, and having it rebuilt at a quality local shop. I put the rebuilt differential back in last week, along with a rear UCA since the salt in upstate NY does a number on suspension parts, rear LCA’s were replaced per the recall. I also did both U-joints on the rear driveshaft. When I pulled the rear driveshaft I found the output shaft was dry after it left the dealer, so I greased that up thinking that might solve my vibration issue.
I put the rear diff back in, tightened everything to spec per the FSM and I’m driving the jeep again. I still have the same vibration on deceleration while in gear. When I did the U-joints I found one of the caps slid into the yolk a lot easier than the rest. Could this be the source of my vibration? I checked the U-joints after a highway drive, the caps were hot, but no single cap was any hotter than the rest.
Could the dealer have mis-indexed the shaft when they did the clutch, their attention to detail was poor on the rest of the work. How important is re-installing the DS aligned to the same point on the TC end and rear diff end? I made sure to mark both ends when I did the diff. Would adjusting either end a quarter or half turn reduce the vibration?
I think my next step might be a (rebuilt or low mile junkyard) rear driveshaft.
