Darrell Goodwin
Junior Member
- Joined
- Mar 1, 2020
- Posts
- 8
- Reaction score
- 5
- Location
- Pueblo, Colorado
- First Name
- Darrell
- Truck Year
- 1982
- Truck Model
- C10
- Engine Size
- 305
I swapped the engine in my '82 C10, from a 305 to a 350. The 350 came out of a 4wd '91 suburban, but it wasn't the original engine. Anyway I bolted a new flex plate to the 350, then the '82 torque converter and tranny onto that then installed into the truck as a unit. It starts right up, but it began making a loud metallic noise. I pulled the transmission and realized the flex plate is warped. It was a new one, I torqued it to spec, everything seemed OK, but obviously something isn't right. What could I have done wrong? Can I press the flex plate back into flatness and re-use it? Since the torque converter slides into the transmission easily, what caused the warp? The older torque converter and the newer one look the same, and what I measured all matched. The new flex plate matched the bolt hole pattern of the one from the 350; the old one from the 305 had a smaller center hole. If I just get another new flex plate, what should I look for when installing the transmission to avoid warping or any other problems?