4L60E , 4L65E No 2nd , No 4th and No Reverse - automatic fourth second shift transmission

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

The 4L60E/4L65E may exhibit a condition of no 2nd, no 4th and no reverse.

2004 and Prior Light Duty Cars and Trucks Equipped with 4L60E or 4L65E Automatic Transmission. Subject is stripped reaction sun shell repairs at less than 25,000 miles. When repairing a transmission with a reaction sun shell that has stripped splines at 25,000 miles or less, be sure to also replace the reaction sun gear (item 673) and the reaction carrier shaft (item 666). Tooth finish of the sun gear and run-out of the reaction shaft are both factors that effect sun shell spline life. Plans are in place to produce sun shells with hardened splines for both production transmissions and service usage. A bulletin will be issued when sun shells with hardened splines are available.

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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.

(00 - 04 All GM Light Duty Trucks and Passenger Cars Equipped with the 4L60E (M30) and 4L65E (M32)

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