Sonnax pump gear set 34201E-SP is designed to meet or exceed OE pump gear performance in 4L80/85-E transmissions with no machining required. These pump gears are specially designed to improve the fit of the gears in the pump body and on the torque converter hub.
Sonnax gears cannot be mated to either OE gear; gears must be used as a matched set.
Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.