Car is an '81 Cadillac deVille diesel. The transmission won't shift into overdrive and the torque converter won't lock up. This started very recently; before that it worked fine. Any ideas what exactly is causing this, what it'll take to fix it, and how likely it is to leave one stranded (local, mostly non-highway driving)?
Would a 700R4 be a drop-in replacement for the 200R4? Bell housing, driveshaft, shift linkage, etc.? If I'm looking at major work on the
200R4, this would seem like a good option.Thanks for any replies.