CY & CX 400THM: differences & similarities

[WILMASBOYL78]

Jeff, I have spoken to Sam's buffy from GM...he knows his stuff. As for the deep pan...it won't impact performance provided the additional fluid it needs has been added. You may also want to check the governor to make sure there is no damage to the plastic gear. That tranny should shift at approx. 6100-6300 rpm under full throttle...both 1-2 and 2-3. The modualtor won't affect what you are describing. When I service my hi-perf trannys we use a flushing machine that my local tranny guy has...it really works to get any debris or metal filings out of the system. A reputable trany guy can pull that unit out with the motor in the car and solve your issues...it takes quite a bit to hurt these hi-perf TH400's.

good luck..wilma