Hi there, new to the forum. I recently bought a 1985 300d from my best friend. The transmission went out for him while he was at a stoplight and he sold it to me cheap. He is a busy guy so he didn't want to try and fix it. He said he came to a stop and when he started moving again there was a little jolt, and no more forward movement.

The car is in amazing shape so I want to figure this out. Reverse still works so I decided to try the b2 piston. While I was down there everything looked normal except the black rubber seal for the b2 piston, it was toast. It also had the original aluminum sleeve. I replaced everything and did a k1 spring kit while I was there.

In the end it wasn't as hard of a job as I first pictured but it didn't fix my problem. Still no forward movement. The b2 brake band seemed intact to me, it sprung back when force was applied and seemed to work smooth. Other than that I am stumped.

Should I start looking for another transmission?

I have also read you can get a longer pin that goes from the brake band to the piston. I have a machine shop, any reason I can't just make one a bit longer, or would that even have a chance of helping?

If not I think I can get a used trans, but it's $400, and about 400 miles away. Also I have never replaced a trans, but I'm sure I could. How big of a job is it without a lift?

Thanks!