High RPM 6L80 6L90 Pump and Bellhousing

6L80/6L90 Pump with Bellhousing | Precision-Machined. Ready for Performance.

This upgraded 6L80/6L90 pump comes complete with the bellhousing and is designed to exceed factory specs for durability, alignment, and fluid pressure performance. Ideal for rebuilders, transmission shops, or DIY installers, this pump is fully machined, cleaned, and inspected for critical wear, ensuring a reliable seal and consistent fluid flow on every build. This modified pump and bell housing for the 6L80 or 6L90 includes an upgraded high performance pump slide spring and billet pump rotor to handle the demands of higher RPM operations.

Features:

• Fits GM 6L80 and 6L90 transmissions
• Upgraded High Performance Pump Slide Spring to stabilize pressure at high RPMs
• Upgraded Billet pump rotor, guide, vanes, rings, seals and bushings
• New upgraded pressure regulator valve and spring
• New upgraded boost valve
• Includes pump and bellhousing
• Machined mating surfaces for precise alignment
• Machined pump rotor pocket to restore pump integrity
• Inspected for warping, scoring, and shaft bore wear
• Compatible with most OEM and aftermarket applications
• Compatible with most OEM and aftermarket applications

Whether you're refreshing a daily driver or building for heavy-duty use, this pump is ready to handle the pressure.

The Billet Pump Rotor

The 6L80E shares one unfortunate trait with its predecessor: the pump rotor design. Just like the earlier models, it is prone to failure under increased performance demands.

The 6L80 and 6L90 shares one unfortunate trait with their predecessors: the pump rotor design. Just like the earlier models, it is prone to failure under increased performance demands.

Upgrading from a 10-vane to a 13-vane pump rotor increases fluid volume, but it also creates inherent weaknesses due to the reduced material between vanes. In high-horsepower applications, this can lead to catastrophic failure. For performance builds, a stronger solution is critical.

High-Performance Pump Slide Spring

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

In high-performance applications, pressure and centrifugal force can push the pump slide out of position, reducing volume and line pressure. The Sonnax spring is stiffer than OE and keeps the pump in its high-volume position, ensuring your clutches stay protected even under extreme conditions.

Benefits:

• Designed for high pressure and high-RPM conditions
• Keeps pump in high-volume position at elevated engine speeds
• Maintains line pressure to prevent clutch failure