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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: Apr 2009 Posts: 192 Shop Shark | | Shop Shark Joined: Apr 2009 Posts: 192 | Why is my mechanic having so much trouble with this rebuild? They tell me it's not as straight forward as it seems? It's a 3 speed in my '61 Half Ton.Any thoughts would be appreciated.Thanks,RAK | | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | I've never heard of a BW WT266 transmission, your truck should have had the SM318 3 speed or a GM variant of the T89 3 speed (non overdrive). In either case, both transmissions are easy to overhaul. You may need to find a mechanic more knowlegable with older vehicles to overhaul it.
Bill Burmeister
| | | | | Joined: Apr 2005 Posts: 2,097 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 2,097 | I just recently found out from my parts supplier that the SM 318 is also refered to as a WT266 in their parts listings. There is also a WT265 which was used in the 64-65 Chevelle. They look very similar but none of the internal parts interchange. You can get parts from Anaheim Gear in Anaheim, CA for these transmissions, however they are pricy. I see these transmissions at swap meets all the time and they are relatively cheap.
Fred
1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine
| | | | | Joined: Apr 2009 Posts: 192 Shop Shark | | Shop Shark Joined: Apr 2009 Posts: 192 | Thanks for clearing that up. It's been rebuilt and my next trip to Oregon I'll drive it,that's where I have it parked. | | |
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