Differential issue...

[a1991zr1]

any curb rash on rim what does car fax say

[| 1990 ZR-1 |]

Originally Posted by Ccmano

Looks like bearing failure, faulty installation or side impact on the wheel caused the yoke to push in against the pinion shaft. I would also inspect the bearing seat in the case for damage. I'm thinking accident damage somewhere in the past that was not picked up. (or ignored)
H

I agree that it's most likely a bearing failure, but not due to an accident since there are zero signs of any damage or repairs to the suspenssion or body. Also, the carfax was clean. I distinctly remember going over a deep in the road where the car almost buttomed out, and I strogly belive that the extra weight inthe trunk strained/stretched the bearing to a point that the yoke started to wear. I'll try to get all the parts this week and put her back together this weekend. I"m reaplacing all rear bushings while I"m under there. Need to get here ready for a corvette show next weekend!!

Quick question. What diff fluid should I use?

[Ccmano]

I use Mobile 1 75-90 synthetic gear lube, no additive required.

http://www.zr1.net/forum/showthread.php?p=79124

H

[vinsZR-1]

Amsoil 75W-90 synthetic lubricant and friction modifier additive.

Vince
90 #1966
Corsa, 410's, Haibeck chip

[a1991zr1]

I use Mobile 1 75-90 synthetic gear lube or lucas makes a great product