727 no 3rd gear
Ok, I'll give this a shot. Many years ago I had this same problem on 2 different trannys. Sb 727 1-2 shift fine , reverse fine. Turned out it was the inner lip seal in the front drum. I know I know had me stumped for quite awhile. Tranny number 2. Bb727 in a truck. 1 of the 2 sealing rings on the rear of the front pump broke, losing pressure or I guess not being able to hold the pressure.these were my findings after many hours of head scratching and conferring with other wise men Kim
That would dump pressure in the same circuit as would a missing #3 ball or stuck shuttle. And is a much more plausible possibility. I jumped to the conclusion that this was a recent rebuild. Good call Kim
Manual valve body....in a DD/streeter.....
I tried that for a while,back in the late 70s;with a TRANSGO kit .At that time all three kits came in the same box,namely TFI/TFII/TFIII, and you could choose whichever one you wanted, and even upgrade as you went. You just couldn't go back from II to I on account of some of the mods were not reversible. But from II to III was reversible.
At first it was a lot of fun. But after the summer was over, I flipped that plate (TFIII) over and went back to Semi-auto (TFII). The only difference in the kit was now when I put it into D, it would shift by itself, allbeit at slightly higher rpm/speed and harshness. I was OK with that, cuz I could still manually shift it up/down, at any rpm.
And I was no longer "forced" to shift manually, with an engine that could not pull third gear from a standstill, even with a 2800TC,lol.Well it could but, man getting moving was pitiful.