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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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| | | | Joined: Dec 2007 Posts: 37 Wrench Fetcher | | Wrench Fetcher Joined: Dec 2007 Posts: 37 | I found a Saginaw SM326 I believe with the 7 bolt side cover and overdrive. Does anyone know the overdrive ratios on these? I have heard .70 and .85. It has the R10Q-1 tailshaft.
Side plate 3858992 Main case #3858986 Tail R10Q-1
Thanks
1959 Apache 3200, Standard Cab, Big Window, Fleetside, 235/3spd, Original Paint
1964 C20 Standard Cab, Fleetside, 283/Power Glide, A/C, Pwr Steering, Pwr Brakes, NoSpin | | | | | Joined: Oct 2006 Posts: 9,671 'Bolter | | 'Bolter Joined: Oct 2006 Posts: 9,671 | Isn't that a three speed???
Denny Graham
Sandwich, IL
Denny G
Sandwich, IL
| | | | | Joined: Dec 2007 Posts: 37 Wrench Fetcher | | Wrench Fetcher Joined: Dec 2007 Posts: 37 | Yes a 3 speed with a syncro first and a Borg & Warner Overdrive unit. 1966-69 GM cars.
1959 Apache 3200, Standard Cab, Big Window, Fleetside, 235/3spd, Original Paint
1964 C20 Standard Cab, Fleetside, 283/Power Glide, A/C, Pwr Steering, Pwr Brakes, NoSpin | | | | | Joined: Feb 2002 Posts: 12,029 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Feb 2002 Posts: 12,029 | | | | | | Joined: Dec 2007 Posts: 37 Wrench Fetcher | | Wrench Fetcher Joined: Dec 2007 Posts: 37 | Thanks Bill
The manual says .70 but the info on the "old burb club" site said .85. Wasn't sure which one it was.
1959 Apache 3200, Standard Cab, Big Window, Fleetside, 235/3spd, Original Paint
1964 C20 Standard Cab, Fleetside, 283/Power Glide, A/C, Pwr Steering, Pwr Brakes, NoSpin | | | | | Joined: Jan 2008 Posts: 4,962 'Bolter | | 'Bolter Joined: Jan 2008 Posts: 4,962 | I think all the Borg Warner tail shafts were .70 no matter who's front box was in front of them. | | |
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