trans?
Moderator
Joined: Aug 2010
Posts: 7,323
Likes: 529
From: Ann Arbor, MI
Since no one has answered yet, let me ask - do you have a 4L60E in there now?
Why do you want to switch to a TH400? Are you making more than 550HP?
Check out the following thread, especially post #7 from Jake'S Performance:
https://ls1tech.com/forums/automatic...0-vs-4l80.html
Why do you want to switch to a TH400? Are you making more than 550HP?
Check out the following thread, especially post #7 from Jake'S Performance:
https://ls1tech.com/forums/automatic...0-vs-4l80.html
A 400 is cheaper and stronger, but you have to consider a crossmember,a shifter and you will have to get a driveshaft built,and you have to figure in the rear gear for either one of them. It really depends on what your going to do with the car. I think the price kind of equals out. If your going to drive it much and your not going over 500rwhp I would do the 4l60, if your mainly going to race it go with the 400.
