I took the car to auto trans shop. The guy was insistent that with my symptoms, it could neither be the linkage or the vacuum because both would effect all shifting. This seems to make sense. Am I wrong? Only 4th gear is effected.

I looked at the modulator today. It looked fine, there were no obvious breaks in trhe line.

Todd, are you saying that your rear pump going out (this is the pump that creates trans fluid pressure) caused only 4th gear to go out and you had no other symptoms?

Can a bad modulator only cause symptoms on certain gears and not all of them?

I have my manual tranny on my 67 that worked fine. I am leaning in the direction of using that tranny as a replacement in this car. I have not had a very good time with the automatic. Just replacing the double-acting solenoid will be $350 just for the part.

I don't want to make this switch in haste, but I get the feeling that fixing the automatic will be more money and time than paying a mechanic to switch the transmissions.

I'll probably be starting a new post about what the small print is on changing transmissions.

Thanks
Eddie

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1965 220SEb Manual