- Code 1811
- Code P0741, P0742
- Intermittent line pressure
- Low line pressure
- Shudder condition
A worn torque signal valve/bore and/or a sticking torque signal valve.
The Sonnax valve and tool allow you to salvage the valve body by oversizing the bore and restoring proper hydraulic clearances.
Oversized Torque Signal Valve
1997 & later
P1811 code or a slip/shudder condition can indicate a pressure control problem in the 4T65-E. A worn or sticking torque signal regulator valve and bore reduces or prevents line rise, resulting in long soft shifts and slippage. The Sonnax 84754-TL44 tool kit sizes and finishes the bore to accept the oversized valve 84754-44, restoring proper function to the torque signal oil circuit.
- Salvages valve bodies with worn torque signal bore and/or sticking valve.
- Corrects P1811 code, slip/shudder condition and intermittent no/poor line rise.
To eliminate codes 1811 and 741and TCC-related issues, be sure to also inspect the actuator feed limit valve, boost valve assembly, TCC regulated apply valve and TCC apply valve. The PCM must be reset/relearned after any valve body repairs. Aftermarket scanner relearn procedure or battery disconnect for 12 hours may not restore drivability and line pressure control. Performing a dealer reflash or a web reflash is frequently the only method to properly restore control.