My father and I recently swapped out my bad stock diff for a used OEM one from a ZHP. Shortly thereafter, I noticed a slight humming/vibration in the driveline. Over time, the slight vibration grew much more pronounced. Here is what I feel:
When you turn right (at speed, +10 MPH), the vibration/sound goes away completely. This does not happen when you turn left however. Vibration sounds/feels like the transmission area, yet there is no vibration through the shifter rod whatsoever.
Initial try at curing vibration started with swapping out my 19" for my stock M68 17". This did not solve the vibration issue (this ruled out an unbalanced wheel).
First thought (when the vibration was minor and noticeably different when turning left vs right), wheel bearings. Replaced both sides, no dice.
Second thing, might as well replace the front control arm bushings, since they were shot; Replaced with OEM, no fix to vibration.
Third... gotta be that differential we put in. Replaced with another... still no fix.
My thought is that the driveshaft must be unbalanced. The front and rear joints appear to be in good condition. But why is it that the vibration disappears when turning right vs. left? Does it have something to do with the rotation of the driveshaft not being circularly balanced (?) :hmm: This will probably be one for the shop to figure out...
Has anyone experienced these issues?
When you turn right (at speed, +10 MPH), the vibration/sound goes away completely. This does not happen when you turn left however. Vibration sounds/feels like the transmission area, yet there is no vibration through the shifter rod whatsoever.
Initial try at curing vibration started with swapping out my 19" for my stock M68 17". This did not solve the vibration issue (this ruled out an unbalanced wheel).
First thought (when the vibration was minor and noticeably different when turning left vs right), wheel bearings. Replaced both sides, no dice.
Second thing, might as well replace the front control arm bushings, since they were shot; Replaced with OEM, no fix to vibration.
Third... gotta be that differential we put in. Replaced with another... still no fix.
My thought is that the driveshaft must be unbalanced. The front and rear joints appear to be in good condition. But why is it that the vibration disappears when turning right vs. left? Does it have something to do with the rotation of the driveshaft not being circularly balanced (?) :hmm: This will probably be one for the shop to figure out...
Has anyone experienced these issues?