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Mod | | | Forums66 Topics128,049 Posts1,055,741 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!
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| | | Joined: Nov 2009 Posts: 84 'Bolter | | 'Bolter Joined: Nov 2009 Posts: 84 | I have two transmissions that I was going to combine and rebuild into one good one. Once they were both fully apart, I noticed some things that I don't know.
One case has an 8 GM 591615 (the one from my truck) and the other has 6 GM 591615 (extra trans).
Not sure if there is a significance of the first number when deciding which case to use.
The mainsheet in the 8 GM 591615 is stamped, WT242-2C. My truck is a '51 and I think the '51 trans has a WT242-2B mainshaft.
I guess what I'm asking is; is there a problem with mixing parts and or case?
Does anyone have the specs for the transmission components so I can hunt for the correct ones?
Any help from Bolters would be great! | | |
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