Th475 behind a turbo 4.8 help
Thread Starter
Staging Lane
Joined: Dec 2013
Posts: 86
Likes: 0
Th475 behind a turbo 4.8 help So I have a stock th475, it looks to have a transgo kit in it but I ordered another one just in case. My questions are as follows and please forgive my ignorance, I usually use 80es so the 3 speed life is new to me. It has the vacuum mod on the side, do I need to hook that up with a check valve inline or do I just run it straight to the intake? Also the car does not have very lofty goals, it's your basic gen 4 4.8 with a ls9 cam, pac springs and a 7665 turbo. Only shooting for around 500ish at the tire. I'm going to be using the PTC that came with it. It has a 3500 stall. Should I be looking at upgrading the clutch packs or should I leave it alone? It's going in a 83 Fairmont so it isn't necessarily a heavy car or anything. What would you guys recommend I do to keep this transmission in one piece? Any tips or tricks? Or just do the transgo kit and let it rip.
Thanks for all the help
Thanks for all the help
TECH Junkie
Joined: Jul 2015
Posts: 3,012
Likes: 48
So I have a stock th475, it looks to have a transgo kit in it but I ordered another one just in case. My questions are as follows and please forgive my ignorance, I usually use 80es so the 3 speed life is new to me. It has the vacuum mod on the side, do I need to hook that up with a check valve inline or do I just run it straight to the intake? Also the car does not have very lofty goals, it's your basic gen 4 4.8 with a ls9 cam, pac springs and a 7665 turbo. Only shooting for around 500ish at the tire. I'm going to be using the PTC that came with it. It has a 3500 stall. Should I be looking at upgrading the clutch packs or should I leave it alone? It's going in a 83 Fairmont so it isn't necessarily a heavy car or anything. What would you guys recommend I do to keep this transmission in one piece? Any tips or tricks? Or just do the transgo kit and let it rip.
Thanks for all the help
Thanks for all the help
