My T Maxx Pro .15 refuses to shift after I converted the tranny to forward only. I checked the slipper clutch, the tuning, and the adjustment screws. What the heck is wrong with my T Maxx? I give it throttle, and it takes off, going faster and faster, the motor becoming more high pitched as I accelerate, until it eventually stalls. No shift.

if its running to rich it wont shift. or one of the pins might have fallen out

All parts in the tranny are accounted for, and it is not running too rich.

not sure about traxxas but mabee ther FOC is a single speed combo???
but i never had good luck with anything traxxas

this happend to me except i have a .32 on mine. when u put it in there is 2 big gears in there. 1speed and 2speed. if they came out or you took the out when u were installing when u put them back togather it has to back togather exactly the way it cqame out. i took my tranny apart 8 times to get it right i know i have been there this sucks