The shift speed prevented the large-cube Pontiac from winding out in each gear, and that significantly limited acceleration and overall feel on the street. After trying another Turbo 400 governor ...

For the price of the trans pan, valve body, and separator plate gaskets, the firmness and quickness of GM Turbo 400 upshifts and ... speeds up the high-to-2nd-gear manual downshift.

He adds, “We calibrate shift points and set redline parameters ... We took a classic ’67 Chevelle and swapped out a Turbo 400 for the late-model efficiency of a Gearstar 700-R4 overdrive ...

As we marched into the era of electronically controlled transmissions, the debate was no different in the olden days when trying to decide between a Turbo 350 and Turbo 400. The TH350 is lighter ...