727 Locked up while driving causes?

I am really quite unfamiliar with the terminology and all and did not realize the transgo tf3 was a manual valve body kit.(google helps) It does indeed have a manual valve body kit in it, but it was installed by the p/o and I am unaware of the specifics.Many miseries in this car I have been addressing so its really a guessing game most of the time how would I go about checking if it was a transgo kit? Only mopar I own other than the 02 3500ram at the farm.


Bret