Allison 1000 2000 2400 GM Duramax Transmission P1 drive flange
GM Allison 1000/2000/2400 transmission
P1 Drive Flange
Part #D121140 (29546706)
A must for high mileage transmissions and those used in extreme conditions
Wear occurs on the internal splines of the plate where the P1 sun gear locks into it.