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Automatic Transmission Overhaul - 4L60-E: Removal & Installation GMC Envoy I

Automatic Trans 4 illustrations ~300 words

Removal & Installation

Mark drive shaft for reassembly reference. Remove drive shaft. Pry oil seal from extension housing. Coat outside edge of NEW oil seal with non-hardening sealer. Using Seal Installer (J-21426), install oil seal. To complete installation, install drive shaft. Check fluid level.

Removal

  1. Remove transmission oil pan. Remove oil filter and "O" ring. Ensure "O" ring is removed from transmission case. Remove electrical connectors from switches and solenoids, and mark for reassembly reference. Remove pressure switch assembly. Remove detent spring bolt. Remove detent spring. Remove valve body bolts. Note length and location of bolts for installation reference.
  2. Note direction of manual valve link. Remove manual valve link from manual valve at valve body. (Scheme 17) Remove valve body. Note location of check balls. DO NOT lose balls. (Scheme 18)and (Scheme 19).

Scheme 17

Scheme 17

Scheme 18

Scheme 18

Scheme 19

Scheme 19

Installation

  1. Coat check balls with petroleum jelly. Install check balls in proper locations on separator plate. (Scheme 18)and (Scheme 19). Install manual valve link. Ensure manual valve link is properly seated in manual valve. (Scheme 17) Improper positioning may prevent vehicle operation in "D" range. NOTE: Improper positioning of throttle valve link will result in erratic shift points or high oil pressure.
  2. Install valve body and retaining bolts. Tighten all bolts to specification. See «TORQUE SPECIFICATIONS»(ref-124191-S11448589012001100100000). Lubricate oil filter "O" ring with ATF before installation. To complete installation, reverse removal procedure. Fill transmission with fluid.

Install Piston Compressor (J-29714) on oil pan. Compress servo cover, and remove retaining ring. (Scheme 20) Remove servo cover and "O" ring. Remove 2-4 servo assembly. To install, reverse removal procedure. For servo pin length check, see 2-4 SERVO ASSEMBLY under TRANSMISSION DISASSEMBLY.

Scheme 20

Scheme 20: Removal & Installation

See TRANSMISSION REMOVAL & INSTALLATION - A/T article in the TRANSMISSION SERVICING section.