M4 segment swap,simple or not so easy?
Thread Starter
Teching In
Joined: Feb 2010
Posts: 12
Likes: 0
From: michigan
M4 segment swap,simple or not so easy? New HP Tuner user, and preparing to change out my 4l60 to a th400. Also wonder if speedometer is required for anything other than trans shift points. May have trans builder plug.
