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Click on image for the lowdown. 
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| | | Forums66 Topics128,048 Posts1,055,664 Members48,426 | | 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 2008 Posts: 1,775 'Bolter | | 'Bolter Joined: Mar 2008 Posts: 1,775 | Some of the newer transmissions specify Synchomax or Synchromesh gear oil. It's just a GL4 gear oil. Supposedly the friction modifiers is GL5 oil are too agressive for the synchronizers.
Just something to think about. | | |
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