This is a copy of emails I've sent to people who were having diff troubles, the problem should be made public, because a Holden workshop mechanic said that he has had a few customer pay for the complete rebuild of their diffs, when they only needed to have the inner shafts Loctited back in a 1.8hr job done with diff in car.
Hi, noticed your post in just for Comodores forum, this problem you have is big, and may be an even bigger, this "attached" document is a "for your eyes only" document sent to all service managers and to me by an inside friend at GM Victoria who will remain anonymous.
I was told I needed a complete diff rebuild by two Holden service managers to cure my cyclic knock problem only 1 month ago, and I have exactly this problem, and I know that all service managers received this document years ago early 2005.
I was going to get charged nearly $1,000.00 for the rebuild and all they were going to do is what was on the document, 1.8hrs and free inner shafts/circlips from Dana if still under warranty.
Everyone should make this as public.
Cheers George
For some reason I cannot attach anything so here is a link
http://forums.justcommodores.com.au/att ... _00001.jpg