greetings everyone!
I am the lucky new owner of a 1980 300sd w116, problem is that I bought it needing trans work, Here is the issue-
engine starts and runs fine, but when shifted from park, there is no movement or activity at any rpm. sounds like a B2 servo, BUT there is no reverse either. I have dropped the pan and valvebody and the internals look very healthy. can anyone here help me solve this mystery ?

Thanks !