Hey there!
First off thank you so much for watching the series!
So many people run their stock transmissions with their upgraded big blocks, and they do work. The problem is based on how long the transmission will work for and that is based on condition. TH400 are the beefer of the GM automatic transmissions, however. On the other hand, to is supremely easy to take the transmission out now and have it rebuilt and have even stronger parts subbed in while the engine is out. That is something you will have to decide on your own.
As far as the rear end goes, the truck differential you have now I'm going to assume is a 12 bolt. That is the differential most people put in their hot rod like I have on my car. In the future you can change out the gearing and put a limited slip in, but it should be able to handle the power on your build, no problem.
Thanks again for using 2CarPros!
Best,
Ryan
SPONSORED LINKS
Monday, October 10th, 2022 AT 4:14 PM