I was going to say too bad that a tranny in a 85' 380SE would not work, or I would sell you my car and you could use the tranny. Still in perfect working order, at 268K. If I cannot get my engine misfire to smooth out, thats exactly what I will do... sell it, despite the fact that I love the 22 year old tank.

Seriously, I do not think a rebuild would be too bad. When I was considering a 86' 560SEL with a slipping tranny, a local tranny shop quoted me $1600 for a rebuild.

Good luck.