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Home >> Isuzu >> 2007 >> i-290 LS, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 48 (Automatic Transaxle - 4T80-E - Introduction (2 Of 2)) >> Repair Instructions >> Repair Instructions - Off Vehicle >> Third Clutch and Reaction Carrier Assemble

Third Clutch and Reaction Carrier Assemble

WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.

Tools Required

    Fig 1: Identifying 3rd Clutch Housing Inspection Points
    GM11936Courtesy of GENERAL MOTORS CORP.
  1. Inspect the 3rd clutch housing (604) for the following:
    • Plugged feed holes
    • Seal ring grooves for nicks or burrs
    • Input shaft for cracked or blocked fluid passages
    • Input shaft bushing for excessive wear
    2. Fig 2: View Of Input Sun Gear & Snap Rings
    GM11937Courtesy of GENERAL MOTORS CORP.
  2. Inspect the input sun gear (631) for damage or wear.
  3. Inspect the snap rings (616, 515, 609) for overexpansion.
    4. Fig 3: Inspecting Thrust Bearing For Damage Or Wear
    GM11938Courtesy of GENERAL MOTORS CORP.
  4. Inspect the thrust bearings (521, 619, 640) for damage or wear.
    5. Fig 4: Measuring Planet Pinion End Play With Feeler Gage
    GM11939Courtesy of GENERAL MOTORS CORP.
  5. Inspect the reaction carrier planet pinions (623) for wear. Inspect the planet pinion end play with a feeler gauge.

    Specification:  Pinion gear end play is 0.09-0.90 mm (0.0035-0.035 in).

    6. Fig 5: Locating Reaction Sun Gear And Shell Assembly
    GM11940Courtesy of GENERAL MOTORS CORP.
  6. Inspect the reaction sun gear and shell assembly (620) for damage.
  7. Inspect the bushing on the reaction sun gear and shell assembly (620) for wear.
  8. Inspect the splines on the third clutch hub (617) for damage.
  9. Check for plugged oil feed holes.
    10. Fig 6: View Of Inspection Areas On 3rd Clutch Plates
    GM11941Courtesy of GENERAL MOTORS CORP.
  10. Inspect the third clutch backing plate (613) for damage.
  11. Inspect all third clutch steel plates (612) for scoring.
  12. Inspect the third clutch apply plate (611) for scoring.
  13. Replace all fiber plates (610).
    14. Fig 7: Inspection Areas On Third Clutch Piston Assembly Seals
    GM11942Courtesy of GENERAL MOTORS CORP.
  14. Inspect the seals of the third clutch piston assembly (606). Inspect the checkball orifices. The checkball should move freely in the capsule. If the seals or checkballs are damaged, replace the third clutch piston assembly (606).
  15. Inspect the return spring and retainer assembly (607) for missing or broken springs.
  16. Inspect the snap ring retainer (608) for damage.
    17. Fig 8: Removing Oil Seal Rings
    GM11943Courtesy of GENERAL MOTORS CORP.
  17. Cut the oil seal rings (614) and remove the rings from the input shaft.
    18. Fig 9: Installing Oil Seal Rings Using J 34741-1
    GM11944Courtesy of GENERAL MOTORS CORP.
  18. Install the J 34741-1  over the input shaft. See Special Tools . Adjust the tool so that the bottom of the J 34741-1  matches the correct oil seal ring groove. See Special Tools .
  19. Lubricate the oil seal ring (614) with transmission fluid, and position the ring on the J 34741-1  . See Special Tools .
  20. Using the J 34741-2  , quickly slide the oil seal ring (614) into the oil seal ring groove. See Special Tools .
  21. Readjust the J 34741-1  to the second oil seal ring groove. See Special Tools .
  22. Lubricate the second oil seal ring (614) with transmission fluid, and position the ring on the J 34741-1  . See Special Tools .
  23. Using the J 34741-2  , quickly slide the oil seal ring (614) into the oil seal ring groove. See Special Tools .
    24. Fig 10: Sizing The Oil Seal Rings Using J 34741-3
    GM413778Courtesy of GENERAL MOTORS CORP.
  24. Size the oil seal rings with the J 34741-3  . See Special Tools .
  25. Leave the J 34741-3  in place for at least five minutes. See Special Tools .
  26. Remove the J 34741-3  . See Special Tools .
    27. Fig 11: Locating 3rd Clutch Piston Assembly
    GM11935Courtesy of GENERAL MOTORS CORP.
  27. Lubricate the 3rd clutch piston seals with a light coating of J 36850  or equivalent. See Special Tools .
  28. Install the 3rd clutch piston assembly (606) into the bottom side of the 3rd clutch housing (604). Use a twisting motion when pushing the piston into the housing.
  29. Install the spring and retainer assembly (607), and install the snap ring retainer (608).
    30. Fig 12: Installing Clutch Spring Compressor And Compress The Spring Using J 39694
    GM11934Courtesy of GENERAL MOTORS CORP.
  30. Install the J 39694  -1 and the J 39694  -3 and compress the spring and retainer assembly. See Special Tools .
  31. Install the snap ring (609).
  32. Remove the J 39694  -1 and the J 39694  -3. See Special Tools .
    33. Fig 13: View Of Third Clutch Plates
    GM11933Courtesy of GENERAL MOTORS CORP.
  33. Install the following parts:
    • The apply plate (611)
    • The four fiber clutch plates (610)
    • The three steel clutch plates (612)
    34. IMPORTANT: The backing plate (613) must be installed with the stepped side up.
  34. Install the backing plate (613).
  35. Install the snap ring (515).
    36. Fig 14: Identifying Reaction Sun Gear And Shell Assembly, Reaction Carrier Assembly, Third Clutch Housing & Input Sun Gear
    GM11932Courtesy of GENERAL MOTORS CORP.
  36. Install the following parts:
    • The thrust washer (615)
    • The third clutch hub and bushing assembly (617)
      • IMPORTANT: Make sure that the rolled inner lip of the thrust bearing (619) is facing toward the clutch pack.
    • The thrust bearing (619).
  37. Install the reaction sun gear and shell assembly (620). If the thrust bearing (619) was removed, install this bearing inside the reaction carrier assembly (623).
  38. Install the reaction carrier assembly (623).
    39. IMPORTANT: Make sure that the thrust bearing (640) is installed with the black surface toward the clutch pack.
  39. Install the thrust bearing (640).
  40. Install the input sun gear (631). The sun gear can be assembled in either direction.
  41. Install the snap ring (616).
    42. Fig 15: Locating Selective Washer & Thrust Bearing
    GM11931Courtesy of GENERAL MOTORS CORP.
  42. Install the selective washer (522) and the thrust bearing (521). Secure the washer and the bearing to the top of the clutch housing with J 36850  or equivalent. See Special Tools .
    43. Fig 16: Blowing Air In The Input Shaft Orifice
    GM11945Courtesy of GENERAL MOTORS CORP.
  43. Air check the 3rd clutch assembly by applying 50-60 psi of air to the proper orifice in the input shaft while blocking the orifice on the other side of the input shaft and 3rd clutch housing assembly (604).
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