Symptoms:

  • Lost or damaged component

4L80-E, 4L85-E

Pump Gear Set
Part No. 34201E-SP

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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.

  • Salvages costly pumps
  • OE gear performance
  • Improved tolerance

Sonnax gears cannot be mated to either OE gear; gears must be used as a matched set.

  • Inner Pump Gear
  • Outer Pump Gear

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.

GM 4L80-E, 4L85-E, 400 Valve Body Layout

GM 4L80-E, 4L85-E, 400 Valve Body Layout
  • 4L80-E, 4L85-E Pump Gear Set 34201E-SP