OK, in my recent bout with my tranny, I got to calling around a few shops to see about rebuilding my tranny. More than one has told me that I don't know what tranny I have, or that it's been changed out. I think they are wrong, so I want to see what you guys think. According to them, the tranny on my 83 burb is either a 700r4, or in incredibly rare cases, a th350c (with the lockup convertor). Mine is NOT a lockup convertor. I know this, but they won't believe me. According to one shop GM didn't make a non-lockup th350 after 1980, so it was definantly swapped with an early th350, and had to have the output shaft changed. I think they are confused. Who's got non-lockup TH350's in their 1980+ chevys, or knows the deal with this?