Excessive clearance at the outboard spool fed by the PWM solenoid allows modulating lube to exhaust. The resulting pressure loss causes reduced TC lockup clutch apply pressure, creating TCC-related complaints. Bore wear at the inboard spool can contribute to reduced line pressure. The Sonnax kit 68942-10K salvages the valve body with an oversized hard-anodized valve and a custom spring.

• Oversized valve salvages valve bodies with worn TC lock-up clutch regulator valve bore.
• Kit restores normal converter charge and cooler flow.
• Valve design corrects harsh or no TCC apply, TCC slipping and burn-up.