Any Chevy TH400 Experts?
Finished the 454 for the Green Monster and the motor runs great. Put rear brakes in the C/20 as well. However the trans is now a problem.
The TH400 goes from 1 - 2 fine, but doesnt want to go into 3 until near 4500 rpms.
I replaced the vac modulator and have over 15 vac at modulator off intake.
I cleaned and inspected the governor. Looks fine and valve moves.
I put a static vacuum pump to keep it at 20 and drove it with no shift from 2 - 3
I am thinking kickdown- disconnect the kickdown switch/solenoid at trans? Its pedal actuated.
Any ideas?
Scorp