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Mod | | | Forums66 Topics128,089 Posts1,056,440 Members48,443 | | 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: Oct 2006 Posts: 63 Shop Shark | | Shop Shark Joined: Oct 2006 Posts: 63 | Rebuild project moving along slowly---
This might be a dumb question --- I had the back end up on jack stands, with wheels free. I started the engine, 4 speed manual in neutral. Idling smooth, the drive shaft spins one of the rear wheel slowly. This seems odd to me --- what's up? | | | | | Joined: Mar 2005 Posts: 637 Shop Shark | | Shop Shark Joined: Mar 2005 Posts: 637 | Internal friction in the trans. is the answer, it is nothing to worry about, it is perfectly normal. | | | | | Joined: Jun 2005 Posts: 1,756 Shop Shark | | Shop Shark Joined: Jun 2005 Posts: 1,756 | Try stopping it with your hands. bet you can.
chevyman had it right. | | | | | 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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