*This kit includes upgraded high capacity trim valve springs also known as Mike L trim springs*
The included valve body components in this kit are designed to provide substantial gains in friction plate durability. With this kit installed, the friction torque capacity of the holding clutches and brakes in 2nd through 6th gear is increased by approximately 100% when the lock-up clutch is off and line pressure is at maximum. Since transmission removal is not required, install it before adding engine horsepower to prevent internal damage.
This shift kit works on Allisons from 2001-2010
Neutralizes under load in 3rd or 4th
Burnt C2 and C3 friction plates
Stuck in one gear
Codes: P0732, P0733, P0734, P0735, P0766 and P0777
(2) USA-made hardened steel trim valves, balls, inner and outer springs