Thanks for the info. I have one of those harbor freight scissor lift style transmission jacks, that should make the removal and installation a little easier, but not easier getting it up on a flat surface for inspection and cleaning. When I have changed the gear oil in the running truck, I asked my local parts store for the gasket, and they don't have a listing for it. If you guys have a number, they can cross reference it. Scratch that I saw the tech tip has a bunch of gasket numbers.
The donor truck is also a C20. I may get lucky and find a 4.11 in there. That would be a bonus. My guess is 4.57 like the running truck is. If it's the 5.14 it's a no-go. The donor has been under the truck as long as I have had it, so hopefully no water got in there. If it turns out to be a 4.11, I'll have to swap transmissions too, as the 3 speed's first gear is far too high for 4.11, it would slip the clutch a lot with the 31.6 diameter tires on there.
Last edited by DoubleDingo; 04/29/2021 7:23 PM.
