Sonnax 84754-97K Oversized TCC Apply Valve Kit for GM Transmission - 4T60-E 1997-Up

The Sonnax 84754-97K is an oversized torque converter clutch (TCC) apply valve kit designed for GM 4T60-E automatic transmissions from 1997 and later. This valve kit addresses common transmission problems related to torque converter slip codes and worn valve body bores.

Key Features:

• Oversized TCC apply valve design restores worn valve body bores without replacement
• PTFE seal prevents loss of signal oil that strokes the valve
• Corrects torque converter clutch slip issues and related diagnostic codes
• Acts as the switch valve for converter apply and release functions
• Precision-engineered to address valve cycling from apply to release position

Technical Information:

The TCC apply valve functions as the primary control valve for torque converter engagement and disengagement. When the apply valve becomes worn, it often returns to the unapply position even though the TCC apply solenoid remains energized, causing transmission slip codes and performance issues. This oversized valve kit provides a permanent solution by compensating for bore wear and restoring proper hydraulic pressure control.

Installation Note:

Installation of this oversized valve requires the use of Sonnax tool kit 84754-TL5 or 84754-DJ2 (for 1997-up applications) to properly ream the valve body bore to accept the oversized valve. Professional installation by a qualified transmission technician is recommended.

Kit Includes:

• Oversized TCC apply valve
• PTFE seal
• Return spring