Sonnax 104520-16K Oversized Pressure Regulator and Boost Valve Kit

The Sonnax 104520-16K is an oversized pressure regulator and boost valve kit designed to restore hydraulic integrity and line pressure control in GM 6L45, 6L50, 6L80, and 6L90 automatic transmissions. This kit addresses critical wear issues in the pressure regulator bore that can cause high line pressure, harsh shifts, overheating, soft shifts, and burnt clutches.

Key Features:

• Oversized pressure regulator valve and matched spring restore OE function
• Annular grooves help center valves in bore to reduce future side-load wear
• Hardcoat anodized aluminum valves combat premature wear
• No pump drilling required
• Kit includes pressure regulator valve, spring, boost valve, boost sleeve, and checkball

This kit replaces the original Sonnax oversized pressure regulator and boost valve kit 104520-07K. The pump must be removed to install this kit. Use of the VB-06 is required with the VB-FIX reaming fixture for this installation unless the stator support shaft is removed from the pump body.