Since the introduction of the THM 4T65-E transmission in model year 1997, there have been many major engineering design changes to improve durability and reliability. These changes have affected many of the parts used in the THM 4T65-E. This "Update Handbook" will cover preliminary information and will also explain each change, the parts affected by the change, and any parts interchangeability concerns created by the change. This manual is a companion manual to the 4T65-E Blue assembly and disassembly manual and is most helpful during a rebuild.

Note: Use this update manual together with the rebuild manual for a proper overhaul.  Please see item number 83-4T65ETM.

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