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Automatic Transmission - 4l80-e - Removal & Installation Chevrolet Avalanche I

Automatic Trans 11 illustrations ~827 words

APPLICATION

ApplicationTransmission Model (RPO Code)
Chevrolet
Avalanche4L80-E (MT1) & 4L85-E (MN8)
Cab & Chassis, & Silverado4L80-E (MT1)
Silverado4L80-E (MT1)
Suburban4L80-E (MT1) & 4L85-E (MN8)
GMC
Cab & Chassis, & Sierra4L80-E (MT1)
Sierra4L80-E (MT1)
Yukon & Yukon XL4L80-E (MT1) & 4L85-E (MN8)

TRANSMISSION APPLICATION

WARNINGVehicle is equipped with Supplemental Inflatable Restraint (SIR) system. When servicing vehicle, use care to avoid accidental air bag deployment. SIR system-related components are located in various locations throughout interior and exterior of vehicle, depending on application. Do not use electrical test equipment on or near these circuits. If necessary, deactivate SIR system before servicing components. See appropriate AIR BAG DEACTIVATION PROCEDURES article in GENERAL INFORMATION.
CAUTIONWhen battery is disconnected, vehicle computer may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION before disconnecting battery.

Note. Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

Scheme 177

Scheme 177: Removal
Scheme 177: Removal

Scheme 178

Scheme 178
Scheme 178

Scheme 179

Scheme 179
Scheme 179

Scheme 180

Scheme 180
Scheme 180

Scheme 181

Scheme 181
Scheme 181

Scheme 182

Scheme 182
Scheme 182

Scheme 183

Scheme 183
Scheme 183

Scheme 184

Scheme 184
Scheme 184

Scheme 185

Scheme 185
Scheme 185

Scheme 186

Scheme 186
Scheme 186

Scheme 187

Scheme 187
Scheme 187
  1. Disconnect the negative (-) battery cable.
  2. Drain the transmission fluid. See LUBRICATION in appropriate SERVICING article.
  3. Remove the rear drive shaft. See appropriate DRIVE SHAFTS & UNIVERSAL JOINTS article in DRIVELINE/AXLES.
  4. Support the transmission with a suitable jack.
  5. Remove the transmission mount nuts. (Scheme 177)
  6. Remove the transmission support bolts and nuts. (Scheme 177)
  7. Raise the transmission slightly and remove the transmission support from the vehicle.
  8. Remove the exhaust manifold pipe.
  9. Remove the transfer case, if equipped. See appropriate REMOVAL & INSTALLATION article in TRANSFER CASES.
  10. Remove the transmission mount bolts and mount. (Scheme 178)
  11. Ensure the transmission manual shaft is positioned in mechanical park.
  12. Remove the retainer that secures the cable to the bracket. (Scheme 179)
  13. Remove the range selector cable end (2) from the transmission range selector lever ball stud (1). (Scheme 180)
  14. Depress the tangs and remove the cable from the bracket.
  15. Disconnect the following electrical connectors: Input speed sensor (1). (Scheme 181) Output speed sensor (3). Park/neutral position (PNP) switch (5). Transmission (4).
  16. Disconnect the oxygen sensor (HO2S) electrical connector.
  17. Disconnect the wire harness clip (2) from the bracket on the left side of the transmission.
  18. Cut the tie strap to separate the vent hose from the wiring harness.
  19. Remove the flywheel inspection cover. (Scheme 182)
  20. Mark the torque converter to flywheel orientation.
  21. Remove the torque converter bolts.
  22. Remove the exhaust hanger mounting bracket bolts and brackets, if equipped. (Scheme 183)and (Scheme 184).
  23. Disconnect the transmission oil cooler lines. (Scheme 185)
  24. Plug the transmission oil cooler line fittings.
  25. Remove the stud on the left side of the transmission. (Scheme 186)
  26. Remove the remaining transmission studs. (Scheme 187)
  27. Install the Converter Holding Strap (J-21366) onto the transmission bell housing to retain the torque converter.
  28. Remove the transmission from the vehicle while simultaneously removing the fluid level indicator tube. Pull the transmission straight back.
  29. Remove the transmission from the vehicle.
  1. Install the transmission to the vehicle.
  2. Raise the transmission into place and remove the converter holding strap from the transmission.
  3. Slide the transmission straight onto the locating pins while lining up the marks on the flywheel and the torque converter. The torque converter must rotate freely by hand.
  4. Install transmission studs and bolt. (Scheme 187) Tighten the studs to specification. See «TORQUE SPECIFICATIONS»(/chevrolet/avalanche/i-2001-2006/remont/automatic-trans/#automatic-transmission-4l80-e-removal-installation__torque-specifications).
  5. Install the stud on the left side of the transmission. (Scheme 186) Tighten the stud to specification. See «TORQUE SPECIFICATIONS»(/chevrolet/avalanche/i-2001-2006/remont/automatic-trans/#automatic-transmission-4l80-e-removal-installation__torque-specifications).
  6. Remove the plugs from the transmission oil cooler line fittings. (Scheme 185) Tighten the nut to specification. See «TORQUE SPECIFICATIONS»(/chevrolet/avalanche/i-2001-2006/remont/automatic-trans/#automatic-transmission-4l80-e-removal-installation__torque-specifications).
  7. Connect the transmission oil cooler lines. Tighten to specification. See «TORQUE SPECIFICATIONS»(/chevrolet/avalanche/i-2001-2006/remont/automatic-trans/#automatic-transmission-4l80-e-removal-installation__torque-specifications).
  8. If equipped, install the exhaust hanger mounting brackets and bolts. (Scheme 183)and (Scheme 184). Tighten the bolts to specification. See «TORQUE SPECIFICATIONS»(/chevrolet/avalanche/i-2001-2006/remont/automatic-trans/#automatic-transmission-4l80-e-removal-installation__torque-specifications).
  9. Align the torque converter to the flywheel.
  10. Install the torque converter bolts. (Scheme 182) Tighten the bolts to specification. See «TORQUE SPECIFICATIONS»(/chevrolet/avalanche/i-2001-2006/remont/automatic-trans/#automatic-transmission-4l80-e-removal-installation__torque-specifications).
  11. Install the flywheel inspection cover. Tighten the bolts to specification. See «TORQUE SPECIFICATIONS»(/chevrolet/avalanche/i-2001-2006/remont/automatic-trans/#automatic-transmission-4l80-e-removal-installation__torque-specifications).
  12. Connect the following electrical connectors: Input speed sensor (1). (Scheme 181) Output speed sensor (3). PNP switch (5). Transmission (4).
  13. Connect the HO2S electrical connector.
  14. Connect the wire harness clip (2) to the bracket on the left side of the transmission.
  15. Depress the tangs and install the cable to the bracket.
  16. Install the range selector cable end (2) to the transmission range selector lever ball stud (1). (Scheme 180)
  17. Ensure the transmission manual shaft is positioned in mechanical park.
  18. Install the retainer that secures the cable to the bracket. (Scheme 179)
  19. Install the transmission mount and bolts. (Scheme 178) Tighten bolts to specification. See «TORQUE SPECIFICATIONS»(/chevrolet/avalanche/i-2001-2006/remont/automatic-trans/#automatic-transmission-4l80-e-removal-installation__torque-specifications).
  20. Install the transfer case, if equipped. See appropriate REMOVAL & INSTALLATION article in TRANSFER CASES.
  21. Install the exhaust manifold pipe. Tighten bolts to specification. See «TORQUE SPECIFICATIONS»(/chevrolet/avalanche/i-2001-2006/remont/automatic-trans/#automatic-transmission-4l80-e-removal-installation__torque-specifications).
  22. Install the transmission support. (Scheme 177)
  23. Install the transmission support bolts and nuts. Tighten the bolts and nuts to specification. See «TORQUE SPECIFICATIONS»(/chevrolet/avalanche/i-2001-2006/remont/automatic-trans/#automatic-transmission-4l80-e-removal-installation__torque-specifications).
  24. Install the transmission mount nuts. (Scheme 177) Tighten the nuts to specification. See «TORQUE SPECIFICATIONS»(/chevrolet/avalanche/i-2001-2006/remont/automatic-trans/#automatic-transmission-4l80-e-removal-installation__torque-specifications).
  25. Remove the support from the transmission.
  26. Install the rear drive shaft. See appropriate DRIVE SHAFTS & UNIVERSAL JOINTS article in DRIVELINE/AXLES.
  27. Connect the negative (-) battery cable.
  28. Fill transmission with appropriate fluid to proper level. See LUBRICATION in appropriate SERVICING article.

TORQUE SPECIFICATIONS

ApplicationFt. Lbs. (N.m)
Exhaust Manifold Pipe Nuts39 (50)
Flywheel Inspection Cover24 (33)
Heat Shield-To-Transmission Bolts13 (17)
Oil Pan Drain Plug13 (18)
Oxygen Sensor31 (42)
PNP Switch Bolts18 (25)
Range Selector Bracket Bolts18 (25)
Torque Converter Bolts44 (60)
Transfer Case Adapter Nut37 (50)
Transmission Mount Bolts18 (25)
Transmission Mount Nuts37 (50)
Transmission Studs37 (50)
Transmission Support Bolts & Nuts75 (95)
INCH Lbs. (N.m)
Battery Cable Bolt133 (15)
Exhaust Hanger Mounting Bracket Bolts106 (12)

TORQUE SPECIFICATIONS

See also:
• TORQUE SPECIFICATIONS

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