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BUSY BOLTERS Are you one?  The Shop Area
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Jul 21st, 2025 | | | | Joined: Jun 2005 Posts: 56 'Bolter | | 'Bolter Joined: Jun 2005 Posts: 56 | i am parting out a 58 gmc 1/2 ton pick. i was wondering if the rear end would be a good one to put under a 49 chevy pk/up to change to open rear. i will still be using it as a pick/up, so the low ratio won,t be a problem. are there rears different than the chevy,s.of the same years?
http://www.flickr.com/photos/11977495@N06/sets/
1952 COE
1952 3100
1953 3100
1950 6400
1951 Suburban
| | | | | Joined: Jun 2003 Posts: 546 'Bolter | | 'Bolter Joined: Jun 2003 Posts: 546 | I believe the 1/2 ton GMC rear is a spicer/dana 44. If it will mount it should work, and there are many ratios available for ring/pinion, unlike the Chevy rearends. Someone please correct me if I'm wrong.
Jeff
"Do not walk behind me, for I may not lead. Do not walk ahead of me, for I may not follow. Do not walk beside me either. Just leave me alone, you're starting to freak me out."
1957 GMC 150
| | | | | Joined: Oct 2003 Posts: 5,152 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Oct 2003 Posts: 5,152 | Its likely a Dana and would be a good choice.
1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
It's true. I really don't do anything but browse the Internet looking for trouble... | | | | | Joined: Jan 2008 Posts: 4,903 'Bolter | | 'Bolter Joined: Jan 2008 Posts: 4,903 | Could be a Spicer 45 @ 3.92 behind a standard or 3.07 if it's behind an automatic. GM corporate would be 3.90. The corporate has a third member that pulls out. Spicer has a 1 piece carrier and axle housing. Your axle seats will have to be modified if you go to an open drive shaft because the torque tube keeps the axle from torquing. This is a quite simple task and the Old GMC site has some good instructions on how to do it. | | | | | Joined: Dec 2004 Posts: 1,897 Shop Shark | | Shop Shark Joined: Dec 2004 Posts: 1,897 | Corrections to the above posts. The GMC is likely to have a Spicer 45, not a dana 44. I can't tell you what the diference is, but they are different. Very few dana 44 parts will interchange with the spicer 45. If the jimmy has a spicer, it is possible it also has posi, as that was an option. The only con to this rear end is the brake drums can be difficult to find if they are bad. It should match up pretty well in an AD chevy | | |
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