dut

Help.. I just put a manuel valve shut off from the manifold to the heater core to get rid of some fowl pit heat, I also changed my spark plugs... Now my tranny is acting up. After 15 min. of driving I lose 3rd gear, just goes into to a coast feel with engine reving. Drop to 2nd and the tranny engages and shifts to 3rd for about 30 seconds then repeats problem. Coincident or did I unplug something or screw it up with my manuel shut off.
Thanks for any input.
Dustin

The Money Pit

If it's TH350 check to see if you knocked off the vacuum line to the modulator.That would be in the area you were working,and will definately mess with the shifting of the transmission.

Jvette73

:iagree: sounds liike you knocked the vacuum hose off the modulator