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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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#63170 07/18/2006 4:26 PM | Joined: Jan 2005 Posts: 7 Junior Member | | Junior Member Joined: Jan 2005 Posts: 7 | I have a 56 Chevy 1/2 ton with the original 3-speed Saginaw column shift transmission, and I am looking to convert it to overdrive.
The overdrive transmissions that I've found for sale are either coded R10Q or R10H on the tailshafts. What is the difference between the two (if any at all)?
I've searched through the archives and the best guess that I can come up with is that the R10Q was used in trucks and the R10H was used in cars. Other than that, are there any differences in the two and would they both swap easily with the original three speed saginaw?
Any insight would be greatly appreciated!! | | |
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