I'm hoping for an easy fix for my Son's 1982 Trans Am with a 305H and a 200C automatic.
Ever since we bought the car, the speedo hasn't worked. Today we got into it and I found with cruise control, the car has 2 speedo cables. We removed both, neither were broken. I suspected a possible cruise module problem (wishful thinking), so we picked up a cable for a car with no cruise. So now the cable goes from the tranny to the dash. We first attached the cable in the dash end. When I twirled the other end, the dash speedo needle moved freely. We connected the other end to the tranny. Took it for a ride, and no speedo needle movement. I did a search and found out the speedo gear in the 200C was a problem.
My question is, do I really have to fully disassemble the tranny to replace the speedo gear(s)?

If so, I'm thinking we'll go with a 700R or a TH350.

Joe

 

I just looked thru a 1984 factory manual and it says the 200C speedo driven gear can be replaced with tranny in car, drive gear cannot.
If correct for a 1982 200C, I'll try the driven gear.
Anybody had any luck changing just the driven gear?

Joe

 

Depends on what is broken. The drive gear could be worn out. It's worth a shot to change the driven though.