Coverage: Many General Motors full size rear wheel drive vehicles from 1993 Up. Since introduction, there have been many engineering design changes to improve durability & reliability. These changes have effected nearly every part used in the THM 4L60-E. This "Update Handbook" will explain each change, the parts effected by the change, and any parts interchangeability concerns created by the change. Beginning at the start of production of model year 2001, General Motors introduced a new transmission designated THM 4L65-E with many engineering changes. Currently, this unit is found in the 2001 Cadillac Escalade and any vehicle with a 6.0L engine or larger, that was previously equipped with a THM 4L60-E transmission. The changes in the THM 4L65-E transmission will also be covered in this booklet.

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