93 G20 Vibration/Drone/Clunking Sound - March 19th 2020 11:40 am
I'm getting a drone/vibration at highway speeds and also when I let up off the accelerator I can hear a clunking/knocking sound from underneath right below the front seats.
A little history. I had the rear diff rebuilt with new everything...axle bearings/seals and a 3.73 Dana True-Trac posi kit. All checks out good back there. Also had new u-joints installed, but then had a catastrophic failure of one of the u-joints on the highway. Had the van towed back to the shop that replaced the u-joints, but the damage was so severe they had to have a new driveshaft made. I've had the driveshaft checked twice and it's in balance.
I'm at a loss here...u-joints are tight, rear diff is good, driveshaft is in balance, but I have a sneaking suspicion that the bearing/bushing in the trans tailshaft is shot. I do believe the trans mount is fine as I had that replaced a couple of years ago.
Thoughts?
A little history. I had the rear diff rebuilt with new everything...axle bearings/seals and a 3.73 Dana True-Trac posi kit. All checks out good back there. Also had new u-joints installed, but then had a catastrophic failure of one of the u-joints on the highway. Had the van towed back to the shop that replaced the u-joints, but the damage was so severe they had to have a new driveshaft made. I've had the driveshaft checked twice and it's in balance.
I'm at a loss here...u-joints are tight, rear diff is good, driveshaft is in balance, but I have a sneaking suspicion that the bearing/bushing in the trans tailshaft is shot. I do believe the trans mount is fine as I had that replaced a couple of years ago.
Thoughts?