Quote:
Originally posted by carym123
Can anyone help me with this? I have a 1981 GMC truck with a TH350, I am having problems with it only shifting if I let off of the gas. If I accelerate normal it just revs up, but as soon as I let of the gas it shifts. I thought it was the TV cable and replaced it but nothing.:(
make sure you got at least 15" of vac. at the madulator. but it sounds like youve got the passing gear cable to tight. thats not a t.v. cable, it a passing gear cable. take it loose from the carb. and make sure its free and then drive it with it loose and see if it will shift ok then. if it shifts ok with it loose then you have it adj to tight. :cool: 700R4 has a T.V. cable so it dont need a madulator.:HMMM: