Ratiotek Valve Body Kit Allison 5SPD/6SPD PR (2001-2010)

The RT-A01-PR Kit improves converter clutch holding power, and sets pressure levels to match increased engine torque. After years of testing and evaluation with hundreds of transmissions, the amount of pressure that can be run without causing rapid ring wear is where this spring sets pressure. The RT-A01-PR Kit comes with a shim to match extreme power levels, and helps protect the C1 clutch against burn up.