This OEM/S manufactured, TCC lock-up solenoid for the GM 4L60-E, 4T40-E, 4T45-E, 4T65-E, 4T80-E, 5L40-E and Allison® 1000/2000/2400 transmissions addresses issues with TCC apply and release complaints. The solenoid is 100% tested to OE specifications to ensure full functionality. Caution! This is a PWM lock-up solenoid. Do not use this solenoid to replace an on/off application version in these transmissions or permanent damage to the transmission or ECM may occur.