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Home >> Jeep >> 2021 >> Grand Cherokee L Laredo, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (8HP75 Automatic Transmission (Service Information)) >> Pump, Transmission Oil >> Removal And Installation >> Transmission Oil Pump

Transmission Oil Pump

WARNING: This page is about a different variant/trim than selected.

REMOVAL 

  1. Remove the transmission. Refer to REMOVAL AND INSTALLATION .
  2. Remove the valve body. Refer to VALVE BODY, REMOVAL AND INSTALLATION .
    GC0181441Courtesy of CHRYSLER GROUP, LLC
    1 - Transmission Oil Pump Assembly To Case Bolts
  3. Remove and DISCARD  the transmission oil pump assembly to case bolts.
    GC0183010Courtesy of CHRYSLER GROUP, LLC
    1 - Input Shaft O-Ring
  4. Remove and DISCARD  the input shaft O-ring using a small pick or equivalent.
    GC0181860Courtesy of CHRYSLER GROUP, LLC
    1 - Transmission Oil Pump Assembly
  5. Carefully pry the transmission oil pump assembly away from the case with a small flat blade screwdriver or equivalent through the case opening.
  6. From the front of the transmission, remove the transmission oil pump assembly.
    GC0183094Courtesy of CHRYSLER GROUP, LLC
    1 - B-Clutch Damper Spring
  7. Remove the B-clutch damper spring.
    GC0183222Courtesy of CHRYSLER GROUP, LLC
    1 - B-Piston
  8. Remove the B-piston from the assembly.
    GC0181353Courtesy of CHRYSLER GROUP, LLC
    1 - Snap Ring
    2 - Clutches and Plates
  9. Remove the snap ring.
  10. Remove the clutches and plates.
    GC0181853Courtesy of CHRYSLER GROUP, LLC
    1 - Hub
  11. Remove the hub.
    GC0181624Courtesy of CHRYSLER GROUP, LLC
    1 - Spring Compressor Tool
    2 - Arbor Press
    3 - Transmission Oil Pump Assembly
  12. Position the transmission oil pump housing assembly in a suitable press.
  13. Using (special tool #8285, Compressor, Spring), press on the fingers of the piston retainer to remove tension on the split retaining ring.
    GC0182378Courtesy of CHRYSLER GROUP, LLC
    1 - Retaining Ring
  14. Remove the two halves of the retaining ring.
    GC0183557Courtesy of CHRYSLER GROUP, LLC
    1 - A-Clutch Belleville Spring
  15. Remove the A-clutch belleville spring.
    GC0181945Courtesy of CHRYSLER GROUP, LLC
    1 - A-Clutch Piston
  16. Remove the A-clutch piston.
    GC0152253Courtesy of CHRYSLER GROUP, LLC
    1 - Bolts
    2 - Transmission Oil Pump Housing
    3 - Transmission Oil Pump Front Cover
  17. Remove the bolts and separate the transmission oil pump housing from the transmission oil pump front cover.
    GC0185905Courtesy of CHRYSLER GROUP, LLC
    1 - Oil Pump Front Cover and O-Ring Seal
  18. Separate the transmission oil pump front cover from the transmission oil pump housing and DISCARD  the oil pump housing O-ring seal.
    GC0185296Courtesy of CHRYSLER GROUP, LLC
    1 - Drive Sprockets
    2 - Chain
  19. Remove the drive sprockets, chain and pump body as an assembly.
  20. Remove and DISCARD  all O-rings.

INSTALLATION 

NOTE:

If transmission oil pump was disassembled, replace all O-rings.

GC0185296Courtesy of CHRYSLER GROUP, LLC
1 - Drive Sprockets
2 - Chain
  1. Install the drive sprockets, chain and pump body as an assembly into the transmission oil pump housing.
    GC0185905Courtesy of CHRYSLER GROUP, LLC
    1 - Oil Pump Front Cover and O-Ring Seal
  2. Set the transmission oil pump front cover onto the transmission oil pump housing.
    GC0152253Courtesy of CHRYSLER GROUP, LLC
    1 - Bolts
    2 - Transmission Oil Pump Housing
    3 - Transmission Oil Pump Front Cover
    NOTE:

    The transmission oil pump bolts under the A-clutch must be replaced.

  3. Install the NEW  bolts and tighten to 5 N. m + 45° (44 In. Lbs. + 45°)  .
    GC0181945Courtesy of CHRYSLER GROUP, LLC
    1 - A-Clutch Piston
  4. Install the A-clutch piston with NEW  O-ring seals.
    GC0183557Courtesy of CHRYSLER GROUP, LLC
    1 - A-Clutch Belleville Spring
  5. Install the A-clutch belleville spring.
    GC0181624Courtesy of CHRYSLER GROUP, LLC
    1 - Spring Compressor Tool
    2 - Arbor Press
    3 - Transmission Oil Pump Assembly
  6. Position the transmission oil pump housing assembly in a suitable arbor press.
  7. Using (special tool #8285, Compressor, Spring), press down on the fingers of the piston retainer.
    GC0182378Courtesy of CHRYSLER GROUP, LLC
    1 - Retaining Ring
  8. Install the two retaining ring halves.
    GC0181853Courtesy of CHRYSLER GROUP, LLC
    1 - Hub
  9. Install the hub.
    GC0181353Courtesy of CHRYSLER GROUP, LLC
    1 - Snap Ring
    2 - Clutches and Plates
  10. Install the clutches and plates.
  11. Install the snap ring.
    GC0182351Courtesy of CHRYSLER GROUP, LLC
  12. Install a new B-piston seal.
    GC0183222Courtesy of CHRYSLER GROUP, LLC
    1 - B-Piston
    GC0183094Courtesy of CHRYSLER GROUP, LLC
    1 - B-Clutch Damper Spring
  13. Install the B-clutch damper spring.
  14. Install a NEW  transmission oil pump front cover seal and install the oil pump in the case.
    GC0181441Courtesy of CHRYSLER GROUP, LLC
    1 - Transmission Oil Pump Assembly To Case Bolts
  15. Firmly press the transmission oil pump in place by hand before drawing it in with the NEW  transmission oil pump assembly to case bolts.
    GC0152246Courtesy of CHRYSLER GROUP, LLC

    Perform the following procedure to properly tighten the transmission oil pump assembly to case bolts:

    • Step 1: In order to seat the transmission oil pump properly, pre-tighten bolts (1), (7) and (9) to 6 N.m (53 in. lb.).
    • Step 2: Working in a clockwise pattern, begin tightening the oil pump cover bolts starting at (1). Tighten all bolts to 10 N.m (89 in. lb.).
    • Step 3: Working in a clockwise pattern, finish tightening the oil pump cover bolts starting at (1). Tighten each bolt an additional 90°.
    GC0183010Courtesy of CHRYSLER GROUP, LLC
    1 - Input Shaft O-Ring
  16. Install the NEW  input shaft O-ring.
  17. Install the valve body. Refer to VALVE BODY, REMOVAL AND INSTALLATION .
  18. Install the transmission. Refer to REMOVAL AND INSTALLATION .
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