4L80 SHIFT KIT (1991-2009) T34165E

This kit includes valve body, case and pump components and modifications designed to deliver increased durability while providing short smooth shifts. These changes work in concert with a slight increase in line pressure to greatly improve the overall durability and shift feel of the transmission. The included highly improved wide land self-cleaning design boost valve and bushing resists wear so that pressure rise keeps working properly. Lastly, the EPC boost pressure relief valve system provided helps prevent runaway boost pressure to stop case and valve body wall blow-out due to excess pressure.

Shift Kit; Corrects/Prevents/Reduces Runaway Line Pressure Caused Parts Breakage, Direct Clutch Burn-Up, Low/No Pressure Rise Due to Solenoid Filter Screen Break-Up, with Boost Valve, Bushing, and Pressure Relief Valve