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Automatic Transmission – 4L60E – General Information Page 7C1–4 1.2 7C1 Automatic Transmission – 4L60E – This section provides general information about the automatic transmission, including: A glossary of terms, • Transmission identification information, • Electrical overview of the Transmission Control Module (TCM), • Some notes that address safe workshop practices, • Service notes relating to fasteners and consumable items used at various stages throughout this section, • Special tools required to work on the transmission, • Fastener torque specifications, and • Transmission specifications. For all information relating to the mechanical construction and function of the 4L60E automatic transmission, refer to the Transmission Cutaway Views, • Principles of Operation, • Power Flow, • Complete Hydraulic Circuits, • Bushing and Bearing Locations, • Seal Locations and • Illustrated Parts List. N O T E Specifications quoted in this General Motors Specifications. Recommendations When servicing the transmission, all parts should be cleaned and inspected. Individual units should be reassembled a Thoroughly clean the transmission exterior before removal of any component. b Disassembly and reassembly must be made on a clean work bench. Cleanliness is of the utmost importance, the c Before installing screws and other fasteners into aluminium parts, dip screw threads into transmission fluid to d To prevent thread stripping, always use a torque wrench when installing screws or nuts. e If threads in aluminium parts are stripped or damaged, the parts can be made serviceable by the use of f Protective tools must be used when assembling seals to prevent damage. The slightest flaw in the sealing surface g Aluminium castings and valve parts are very susceptible to nicks, burrs, etc. and should be handled with care. h Expand Internal snap rings and compress external snap rings if they are to be re-used to ensure proper seating i Do not re-use removed O-rings, gaskets and oil seals. j Teflon oil seal rings should not be removed unless damaged. k During assembly of each unit, all internal moving parts must be lubricated with transmission fluid. Oil Cooler Pipes Should any transmission fluid cooling pipe suffer accidental damage, a genuine replacement pipe must be fitted. Refer to |