19 spline 727 big block trans weird slipping

i'm having an issue with my trans, seemed to be shifting fine at first for like 200 miles... after having the carb and intake off shifted fine again but after some miles now from a stop in drive sometimes it barely moves (seems like slipping) and eventually shifts to 2nd but then into third shifts fine. although if i manually start in first it accelerates fine, manually shifts into second find but then when shift into drive it acts like it goes into neutral for a second then into drive?? also if cruising in drive and i kick it into passing gear it'll downshift fine but sometimes also seem like shifting into neutral or slipping??

i've been doing some google searches and maybe the linkage needs adjustment which makes sense because i'm not sure i understood how to adjust it correctly plus it came off a different car and the trans is an ebay buy.

any help would be much appreciated

Can you post-a-pic of the carb and trans end of the linkage ?

Barely moves forward in Drive but moves forward OK in manual first is a classic symptom of a failed roller clutch (sprag).

Quote:

---

Can you post-a-pic of the carb and trans end of the linkage ?

---

just saw your post, i'll get some pics today. the kickdown was about an inch away from the carb throttle shaft wish i would have checked before driving it. i readjusted according to the chilton's and the 727 tf book. took it for another test drive and similar results, although i must have adjusted something wrong because it wouldn't shift in my console correctly... reverse was down toward neutral and i'd have to shift into 2nd then up to drive before it went into drive. it drove better, the barely moving was gone but still seemed to slip a little. i quickly came back and once i went under the car to investigate my adjustments the trans was really hot to the touch. if i remove the pan will there be anything to let me know for sure the sprag is toast, like excess metal?

thanks for the replies