| |
Click on image for the lowdown. 
====
| | | Forums66 Topics128,071 Posts1,055,901 Members48,429 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
| | THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Dec 2007 Posts: 96 Wrench Fetcher | | Wrench Fetcher Joined: Dec 2007 Posts: 96 | My dad worked at Chevy dealerships as a mechanic for years. I bought an old 68 Impala that had a posi rear in it, and when I drove it home, I thought the rear end was going to blow apart with each turn it clacked and hopped so bad. Dad had some small bottles of GM posi rear end additive. He said he stocked up on it just before they reformulated it. The original was made from sperm whale oil. No kidding. When we took the cover off the 12 bolt posi everything looked OK, so I just changed the oil and put in the 3 oz bottle of additive. Presto...no more noise. I put 120K miles on that car and it got me through college. | | |
|
|
| |
