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Mod | | | Forums66 Topics128,157 Posts1,056,876 Members48,458 | | 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
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with Ads!  Again, thanks!
| | | | Joined: Mar 2009 Posts: 7 New Guy | | New Guy Joined: Mar 2009 Posts: 7 | Hey guys, I just bought a 1970 heavy half w/250cyl 4 speed in it. Every thing works & I drove it home. Now I am trying to identify everything. I have the motor (250 #F0918TAB) but having trouble w/trans & rear end. Trans is not orginal, it came w/three on tree. All I can find is GM 4 casting # is 3901127 & has granny low. Not sure about the rear end, is 12 bolt NF #3896838.Any help you can give a rookie would be grateful. Thanks
Jim
Last edited by J Lucas; 03/07/2009 9:29 PM.
| | | | | Joined: Mar 2007 Posts: 4,215 Moderator | | Moderator Joined: Mar 2007 Posts: 4,215 | Welcome Jim, this is where you can find out all you need to know about your old truck. I don't have GM's parts list but your transmission is likely a SM465. You could try asking this question in the engine and driveline forum. You will be surprised what you'll learn. | | | | | Joined: Dec 2001 Posts: 14,522 Moderator: Welcome Centre, Southern Bolters, Legion Hall | | Moderator: Welcome Centre, Southern Bolters, Legion Hall Joined: Dec 2001 Posts: 14,522 | WElcome dodad: welcome to the stovebolt. right place to be. | | | | | Joined: Jun 2000 Posts: 738 Shop Shark | | Shop Shark Joined: Jun 2000 Posts: 738 | | | | | | Joined: Jan 2002 Posts: 866 'Bolter | | 'Bolter Joined: Jan 2002 Posts: 866 | | | | | | Joined: Feb 2006 Posts: 346 Shop Shark | | Shop Shark Joined: Feb 2006 Posts: 346 | Welcome to the Stovebolt, dodad70. 
Terry K.
1951 5 window 1/2 ton
The only way to have a friend is to be one.
-Ralph Waldo Emerson-
| | | | | Joined: Jan 2009 Posts: 47 Wrench Fetcher | | Wrench Fetcher Joined: Jan 2009 Posts: 47 | Welcome to the bolt, sure like to see some pictures of your 1970 I have a 1971. | | | | | Joined: Mar 2009 Posts: 7 New Guy | | New Guy Joined: Mar 2009 Posts: 7 | 53 Panel: Thanks for the info! I tracked down the SM465 and the S/N match. Got 2 out of three now.
Jim | | |
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