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Click on image for the lowdown. 
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| | | Forums66 Topics128,043 Posts1,055,615 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!
| | 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: Jan 2008 Posts: 4,961 'Bolter | | 'Bolter Joined: Jan 2008 Posts: 4,961 | I use 50W full synthetic transmission oil in my jalopies as well as my 18 wheelers and 80w140 full synthetic in all my vehicles rears. The original specs were 90w mineral oil in the transmission and 90w hypoid in the rear in the winter and 140 hypoid in the summer. I put in synthetic and forget about it. | | |
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