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Click on image for the lowdown. 
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| | | Forums66 Topics128,209 Posts1,057,461 Members48,471 | | 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!
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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: Mar 2002 Posts: 9,115 'Bolter | | 'Bolter Joined: Mar 2002 Posts: 9,115 | I switched from the 80 weight gear oil to the 85W140 in my rebuilt four speed and it definitely made the synchros work faster. Also, the gear oil says it is also for limited slip differentials. | | |
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