Sonnax 105740-03K TCC Priority Valve Kit for GM 10L60/80/90 & Ford 10R60/80/90

The Sonnax 105740-03K TCC Priority Valve Kit is a drop-in Zip Valve™ solution engineered to restore torque converter clutch (TCC) performance in GM and Ford 10-speed automatic transmissions. Severe wear at the TCC regulator valve bore — caused by oscillation of the OE valve — allows secondary line and TCC signal pressures to leak to exhaust, leading to overheated fluid, loss of converter feed pressure, TCC slip codes, and potential transmission control module (TCM) errors.

This kit eliminates secondary line pressure leakage by creating a new conditioned bore area for the upgraded valve to operate in. The O-ringed end plug provides a positive seal, preventing critical TCC signal fluid from leaking to exhaust and restoring the full hydraulic integrity of the TCC circuit.

Key Features:

• Drop-in Zip Valve™ design installs quickly and easily without major valve body machining
• New conditioned bore area eliminates secondary line pressure leakage
• O-ringed end plug creates a positive seal to prevent TCC signal fluid loss
• Sleeve manufactured from highly wear-resistant aluminum for long-term durability
• Hardcoat anodized aluminum valve combats premature wear
• Annular grooves help center the valve in the bore to reduce future side-load wear

By reestablishing proper hydraulic integrity, the Sonnax 105740-03K renews TCC performance and helps prevent TCC release concerns, slip codes, and converter feed pressure loss in GM 10L60, 10L80, and 10L90 (Gen. 1 and Gen. 2) as well as Ford 10R60, 10R80, and 10R90 transmissions.