Gm did run the TH200R4 behind the Buick grand national Turbo motors with good success.
Suggest that if the target vehicle is heavy say over 4500# then a 700R4 might be better at getting the vehicle rolling.
The main issue with the 700R4 is getting the throttle cable pressure set correctly - get it wrong and it turns into a stinking pile of burnt clutches and fluid.
In some ways the 4L60E is better in this regard. Transgo offers a vacuum modulator that replaces the computer controller line pressure solenoid. Shifting the forward gears can be done using 2 toggle switches - manual shift automatic. I've been running my own 4L60E like this for a year and its fine.
Last edited by efi-diy; 02/23/09 04:22 AM.
