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Click on image for the lowdown. 
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| | | Forums66 Topics128,096 Posts1,056,473 Members48,444 | | 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: Aug 2006 Posts: 112 Wrench Fetcher | | Wrench Fetcher Joined: Aug 2006 Posts: 112 | gear oil is sticky, so it rotates other trans parts, thicker the oil the more resistance it has. Thats why the new manual transmissions use 10wt or 30wt oil nowadays. (mechanics refill them with 30wt non detergent)
64 & 66 GMC long fleetside 4x4
Cartwright, OK
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