Sonnax Oversized TCC Apply Valve Kit for GM Transmissions

The Sonnax Oversized TCC Apply Valve Kit is a torque converter clutch (TCC) apply valve repair for GM automatic transmissions. It is also called a TCC apply valve or converter clutch apply valve kit. The TCC apply valve works as the switch valve that applies and releases the torque converter clutch. As the OE valve bore wears, hydraulic sealing is lost. The result can be TCC slip, shudder, falling out of lockup when hot, or related TCC codes.

Key Features:

• Oversized valve design restores valve-to-bore sealing after the valve body bore has been reconditioned (reamed)
• Sonnax engineering restores hydraulic integrity to help the valve stroke fully to the lockup position
• PTFE sealing on applicable kits helps prevent loss of the signal oil that strokes the valve
• Helps address TCC apply and release concerns, high TCC slip RPM, converter shudder, overheated fluid and lockup problems
• Made by Sonnax, a long-established name in transmission valve body repair and hydraulic upgrades

Installation Notes: Oversized kits are installed after the worn bore is reamed. Sonnax offers matching tool kits and the VB-FIX reaming fixture for this job. Each kit is built for a specific GM transmission application. The exact contents and valve material vary by kit.

Use this line to repair a worn TCC apply valve circuit. It restores lockup performance and fuel economy and helps protect the transmission from heat caused by converter slip.