Well here's an interesting little problem. The old girl developed a slight repetitive clunk in the rear which started to get worse. I put it up on the hoist with stands under the rear to simulate drive height and ran the car in gear. Clunk underneath was pretty severe and seemed to come from the RHR outer uni.
I pulled it apart and did all uni's. Sure enough, only the rear RHS outer was crap with two of the four posts dry and rusty. All other 14 bearing points were lubricated well and operating fine. Clearly the grease ports to those two bearings had closed up and prevented the regularly applied grease from getting in there.
So I replaced all uni's, cleaned and repainted the driveshafts and put it all back together all beautiful again.
Test drive around the block and the clunk is still there. Not quite as bad but rolling down the street with engine off in neutral and the clunk is very obvious.
What the hell could it be. Fully rebuilt driveshafts, new lube in slip joints, new bolts and nylocks, yet the noise remains?
Could driving the damaged driveshaft have caused some internal issue inside the gearbox / diff?
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