no kickdown on 75 350 chevy, help!

[turfclubroad]

Sorry about the dramatic title, but I really have no idea what could be causing it. My 1975 350 engined argosy 20 does not have a kickdown. I would like to be informed as much as possible before handing it over to a Garage. Can anybody suggest what the possible reasons may be? I would not want to be conned into unneccesary repairs.

thx

Wiebe

[r carl]

First thing to check would be the carburetor throttle and trans linkage and vacume lines.

[ROBERT CROSS]

Wiebe,

350ci engine, Turbo 350 trans?

Shift points controlled by vacuum shift module.

Kickdown=passing gear, above 45mph.

A cable controls the passing gear and is easily adjusted.

Jack & block the rear of the vehicle, foot on the break as you put it in gear, off the break, run it through the gears. Driving normal, the shifts should be second gear, at about 15-18 mph, and third gear at about 28-30 mph. Adjust your kick down cable,(engine off), to where the cable is pulled all the way when the gas pedal is all the way to the floor. Have someone push it to the floor & hold it there. Adjust the cable to where it is all the way out with just a little slack, if it were pushed to the floor it wouldn't break the cable.

A vacuum module controls shift points and can also be adjusted. Better done at a shop as the module should come off and be cleaned. Although you can remove the vac hose, if any trans fluid comes out time for replacement.

Bob

[overlander63]

The turbo 400 has an electric switch and solenoid to control the kickdown. It is a different animal from the turbo 350, which has a cable. If you can tell us which one it is, that would help a lot with what to tell you to look for.

[Keyair]

The TH350 has a kickdown cable, attached to the carb.