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I had my car repaired today. The noise was present when I took the car in, so it was easy to demonstrate to the mechanic. The problem was initially not obvious, but I was later phoned and told they found damage to the left CV shaft ("constant velocity" shaft joining the differential and axel...

There are 2 threads going under vy commodore on this topic the other is "diff clunk question" As I just posted on the other thread The noise in my differential described in my previous post may either be differential backlash or cyclic rear axle knock; I have talked about this with various...

The noise in my differential described in my previous post may either be differential backlash or cyclic rear axle knock; I have talked about this with various people including a mechanical engineer and it is not clear which is the more likely. So I have decided to get a differential and axle...

I agree with Danja that my noise seems more like differential backlash than rear axle cyclic knock. My Holden dealer called it diff backlash, and said not to worry about it. But the problem is the noise is not a single knock, it is a cyclic noise that changes frequency as you accelerate, and...

Thanks to Georgehifi and Vymad (and justcommodore) for the explanation of the differential thump noise from the rear of my car. See the post Common vy diff fault http://forums.justcommodores.com.au/vy-holden-commodore-2002-2004/93957-common-vy-diff-fault.html#post1125393 I too was...

Thanks to Georgehifi and Vymad for this explanation of the differential thump noise. I too have been told by a holden dealer that the only solution is a $1000 diff rebuild. I was told it is "differential backlash" which may be a fictional condition, ie it does not exist. It seems GM in their...

Ive got the diff clunk issue, (sorry to repeat the info below) in my Berlina (2003, VY 1) sedan (132 000 km). After reading lots of posts and searches in this forum, I think it is differential backlash. (If anyone disagrees, please let me know). I took the car to my regular dealer several times...

I have a Berlina (2003, VY 1) sedan with 132 000 km The noise is clunk or thump, repeated regularly like something is revolving, but rotation speed and noise frequency may be slow, fast, or changing (noise suggests differential backlash to an experienced observer). Once it starts it may...