6L80, 6L90

Pump Slide Spring

Part No.


Pump Slide Spring
  • Pump Slide Spring


6L80, 6L90

Pump Slide Spring

Part No. 104534-HD

Sonnax high-performance pump slide spring 104534-HD for GM 6L80 and 6L90 transmissions helps maintain consistent pump volume during line rise and at high-RPM operation.

In high-performance applications at high engine speeds, increased pressure and centrifugal force on the pump vanes act to center the pump slide, reducing pump volume and limiting maximum pressure. In high-performance applications it is critical to maintain maximum pump volume in order to hold line pressure and prevent clutch failure. The Sonnax spring is stiffer than OE and is able to hold the pump slide in a maximum-volume position despite increased pressure and high engine speed.

  • Designed specifically for high-RPM conditions
  • Keeps pump in high-volume position at high-RPM

GM 6L80 Series Transmission Upgrades & Repairs

Sonnax High Performance Product Line Manager, Gregg Nader, delivers an in-depth look at four popular GM 6L80-series transmission upgrades and repairs. Featured products include the heavy-duty 4-5-6 clutch apply piston kit, high-strength pump slide spring, proven line pressure booster kit and award-winning Zip Kit®.

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