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Home/Chevrolet/Avalanche/Chevrolet Avalanche I (2001-2006)/Repair manual/Automatic Transmission - 4l80-e/4l85-e (Service & Replacement)/Pressure Regulator Replacement
Contents Wiring diagrams Section: Automatic Transmission - 4l80-e/4l85-e (Service & Replacement) All sections

Pressure Regulator Replacement Chevrolet Avalanche I

Automatic Transmission - 4l80-e/4l85-e (Service & Replacement) 8 illustrations ~305 words

Pressure Regulator Replacement

Tools Required

J 36850 Transjel®

Scheme 1047

Scheme 1047: Removal Procedure
Scheme 1047: Removal Procedure

Scheme 1048

Scheme 1048
Scheme 1048
  1. Raise and suitably support the vehicle. Refer to «LIFTING AND JACKING THE VEHICLE»(/chevrolet/avalanche/i-2001-2006/remont/hoistjack/#jacking-and-lifting-avalanche__lifting-and-jacking-the-vehicle) in General Information.
  2. Remove the transmission filter. Refer to «AUTOMATIC TRANSMISSION FLUID/FILTER REPLACEMENT»(/chevrolet/avalanche/i-2001-2006/remont/automatic-trans/#automatic-transmission-4l80-e4l85-e-service-replacement) . CAUTION: Valve springs can be tightly compressed. Use care when removing retainers and plugs. Personal injury could result.
  3. Remove the reverse boost valve bushing retainer ring (2).
  4. Remove the following from the reverse boost valve cylinder: The reverse boost valve bushing The reverse boost valve The pressure regulator spring retainer The pressure regulator spring The pressure regulator valve The reverse boost valve bushing

Scheme 1049

Scheme 1049: Installation Procedure
Scheme 1049: Installation Procedure

Scheme 1050

Scheme 1050
Scheme 1050
  1. Install the pressure regulator valve using J 36850.
  2. Pre-assemble the following parts: The reverse boost valve bushing A new reverse boost valve A new pressure regulator spring retainer The added isolator pressure regulator spring The pressure regulator spring
  3. Install the pre-assembled parts into the pump bore.
  4. Install the reverse boost valve bushing retainer ring while holding the reverse boost valve bushing in place. Ensure the retainer ring (2) is in the groove.
  5. Install the transmission filter. Refer to «AUTOMATIC TRANSMISSION FLUID/FILTER REPLACEMENT»(/chevrolet/avalanche/i-2001-2006/remont/automatic-trans/#automatic-transmission-4l80-e4l85-e-service-replacement) .
  6. Fill the transmission to the proper level with DEXRON® III transmission fluid. Refer to «TRANSMISSION FLUID CHECKING PROCEDURE»(/chevrolet/avalanche/i-2001-2006/remont/automatic-trans/#automatic-transmission-4l80-e4l85-e-service-replacement) .

Scheme 1051

Scheme 1051: Removal Procedure
Scheme 1051: Removal Procedure

Scheme 1052

Scheme 1052
Scheme 1052
  1. Remove the transmission filter. Refer to «AUTOMATIC TRANSMISSION FLUID/FILTER REPLACEMENT»(/chevrolet/avalanche/i-2001-2006/remont/automatic-trans/#automatic-transmission-4l80-e4l85-e-service-replacement) . CAUTION: Valve springs can be tightly compressed. Use care when removing retainers and plugs. Personal injury could result.
  2. Remove the valve bore plug retainer ring (1).
  3. Remove the following parts: The valve bore plug The TCC valve The TCC valve spring

Scheme 1053

Scheme 1053: Installation Procedure
Scheme 1053: Installation Procedure

Scheme 1054

Scheme 1054
Scheme 1054
  1. Install the following parts: The TCC valve spring The TCC valve The valve bore plug
  2. Install the valve bore plug retainer ring (1).
  3. Install the transmission filter. Refer to «AUTOMATIC TRANSMISSION FLUID/FILTER REPLACEMENT»(/chevrolet/avalanche/i-2001-2006/remont/automatic-trans/#automatic-transmission-4l80-e4l85-e-service-replacement) .