GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 Yukon - 4WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L60-E 🢒 Control Valve Body Assemble

Inspection Procedure

    Object Number: 7628 Size: SH
  1. Inspect the valve body to spacer plate gasket for valve body channel witness marks. The witness marks should be complete. Incomplete witness marks may be caused by an uneven case surface. Incomplete witness marks may also be caused by cross-channel leaks.
  2. Inspect the valve body casting for the following conditions:
    3. • Porosity
    • Cracks
    • Damaged machined surfaces
    • Chips or debris

Cleaning Procedure
  1. Clean all the valves, springs, bushings, and the control valve body in clean solvent.
  2. Dry all the parts using compressed air.

Installation Procedure

    Object Number: 405096 Size: SH

    Caution: Valve springs can be tightly compressed. Use care when removing retainers and plugs. Personal injury could result.

    Important: Lubricate all parts with Dexron®-lll automatic transmission fluid before installation.

  1. Install the following items:
    2. 1.1. The isolator valve (398)
    1.2. The regulator apply spring (397)
    1.3. The regulator apply valve (380)
    1.4. The bore plug (381)
    1.5. The bore plug retainer (395)

    Object Number: 405094 Size: SH
  2. Install the following items:
    3. 2.1. The 4-3 sequence valve spring (382)
    2.2. The 4-3 sequence valve (383)
    2.3. The 3-4 relay valve (384)
    2.4. The bore plug (381)
    2.5. The bore plug retainer (395)

    Object Number: 405092 Size: SH
  3. Install the following items:
    4. 3.1. The 3-4 shift valve (385)
    3.2. The 3-4 shift valve spring (386)
    3.3. The bore plug (381)
    3.4. The bore plug retainer (395)

    Object Number: 405086 Size: SH
  4. Install the following items:
    5. 4.1. The reverse abuse valve (387)
    4.2. The reverse abuse valve spring (388)
    4.3. The bore plug (359)
    4.4. The coiled spring pin (360)
    4.5. The 3-2 downshift valve (389)
    4.6. The 3-2 downshift valve spring (390)
    4.7. The bore plug (381)
    4.8. The bore plug retainer (395)

    Object Number: 405083 Size: SH
  5. Install the following items:
    6. 5.1. The 3-2 control valve spring (392)
    5.2. The 3-2 control valve (391)
    5.3. The 3-2 control solenoid (394)
    5.4. The solenoid retainer (395)

    Object Number: 405080 Size: SH
  6. Install the following items:
    7. 6.1. The actuator feed limit valve (374)
    6.2. The actuator feed limit valve spring (375)
    6.3. The bore plug (376)
    6.4. The bore plug retainer (395)
    6.5. The pressure control solenoid (377)
    6.6. The solenoid retainer (378)
    6.7. The solenoid retainer bolt (364)

    Object Number: 13144 Size: SH
  7. Install the following items:
    8. 7.1. The 1-2 accumulator valve spring (370)
    7.2. The 1-2 accumulator valve (371) in the 1-2 accumulator valve sleeve (372)
    7.3. The 1-2 accumulator valve and sleeve assembly
    7.4. The coiled spring pin (360)

    Object Number: 405074 Size: SH
  8. Install the following items:
    9. 8.1. The 2-3 shift valve (368)
    8.2. The 2-3 shuttle valve (369)
    8.3. The 2-3 shift solenoid valve (367B)
    8.4. The solenoid retainer (395)

    Object Number: 405071 Size: SH
  9. Install the following items:
    10. 9.1. The 1-2 shift valve spring (365)
    9.2. The 1-2 shift valve (366)
    9.3. The 1-2 shift solenoid valve (367A)
    9.4. The solenoid valve retainer (395)

    Object Number: 13239 Size: SH
  10. Install the following items:
    11. 10.1. The forward abuse valve (357)
    10.2. The forward abuse valve spring (358)
    10.3. The bore plug (359)
    10.4. The coiled spring pin (360)
    10.5. The low overrun valve (361)
    10.6. The low overrun valve spring (362)
  11. Install the following items:
    12. 11.1. The forward accumulator oil seal (353) on the forward accumulator piston (354)
    11.2. The forward accumulator pin (355)
    11.3. The forward accumulator piston (354)
    11.4. The forward accumulator spring (356)
    11.5. The forward accumulator cover (363)
    11.6. The forward accumulator cover bolts (364)

    Object Number: 13146 Size: SH
  12. Install the manual valve (340).