Replacing 1977 Pontiac Bonneville's transmission

pontiac
bonneville
#1

I have a 1977 Pontiac Bonneville with the Metric 200 transmission. It is failing. I want to replace it with a THM 350. Is this a direct swap with the proper length shaft? What should a rebuilt cost?

#2

A 350 and the 200 are the same size externally. You can buy a 350 trans from performance parts suppliers for $1800 or so. You will need a new torque converter - another $200 or so. I read that the 200 uses a throttle kickdown linkage where the 350 did not. The 350 may need a vacuum line connection to the engine for that function, not sure.

#3

Thanks for the info. Not sure the car is even worth that much. It runs ok when it has enough fluid, but it leaks like crazy.