Allison LCT1000 Intermittent No Reverse Cold Only - kw body gear information inoperative no operation

When servicing the vehicle with the VIN you entered, the following diagnosis might be helpful if the vehicle exhibits the described symptoms.

The Allison LCT1000 Automatic Transmission may exhibit a condition of intermittent no reverse when the transmission oil temperature is approximately 32 degrees F (0 degrees C) or colder. Reverse operation will begin functioning again once the transmission has operated approximately 3 - 5 minutes. Electrically unplugging the transmission will not change the operation of reverse. All the forward gears perform properly when reverse is inoperative.

The TCC "F" solenoid should be replaced. The TCC "F" solenoid may leak in cold conditions. TCC operation is not effected as the transmission fluid temperature and solenoid will have warmed up before TCC is requested.

.

Please follow this diagnosis process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed. If these steps do not resolve the condition, please contact GM TAC for further diagnostic assistance. This diagnostic approach was developed for the vehicle with the VIN you entered and should not be automatically be used for other vehicles with similar symptoms.

(04 Chevrolet Silverado)

.