Transmission Disassembly: Notes
NOTE:
Beginning at start of production for all 1996 models, some 4L60-E transmissions were built with a bolt-on bellhousing. This design is used on models with a 4.3L engine. Design change will make 4L60-E transmission more versatile for a wide variety of engine sizes. Bolts securing bellhousing require a Torx-Plus 50-IP bit for removal. Bolt heads will strip if incorrect tool is used during removal. Transmission case has a totally different casting design for bolt-on bellhousing. Oil pump body has a machined ring added to front of pump body to center bellhousing on installation. Pump body with added machined ring may be found on and can be used in 1995 models, but cannot be used in 1993-94 models.