hey boys

got a th375 in my camino. i fitted a b&m shiftkit and everything worked fine, selected 1st on my shifter and it would rev out til i changed it to 2nd..

then i went along and fitted a 2600 stall, and now the box wont hold 1st..it changes on its own at around 4500rpm, instead of my usual 6500! that sucks! my cam is pretty rough so the car dies with the early change!

help pls