948TE Automatic Transmission (Service Information): Disassembly: Disassembly

The 948TE automatic transmission can be overhauled if the vehicle is beyond it's warranty coverage. Verify that the vehicle is no longer covered by warranty before proceeding with this procedure. A clean work area is necessary to assure a properly functioning transmission after the overhaul procedures are completed. Special tools have been developed and are required to disassemble this transmission. Acquire all of the special tools before starting this procedure.

Before disassembling the transmission, wash the transmission with a suitable solvent and a siphon pressure washer to remove oily grime and loose dirt. Place the transmission on a clean work surface with ample fluid drainage or absorbency.

Fig 1: Wire Connector Socket Clip

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1. Remove the clip holding the wire connector socket in the valve body cover pan.
   Fig 2: Valve Body Cover Pan Bolts

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2. Remove the valve body cover pan bolts (1).
3. Remove the valve body cover pan from the transmission.
   Fig 3: Valve Body Bolts

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4. Remove the valve body bolts (1).
5. Using a suitable prying tool, pry the valve body away from the adapter tubes.
   Fig 4: Fluid Pressure Transducer Wire Harness Connector

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6. Turn the valve body over to gain access to wire harness connectors.
7. Release the lock (2) on the fluid pressure transducer wire connector and separate the wire connector (2) from the fluid pressure transducer (1).
   Fig 5: Removing/Installing Wire Harness Connector At Valve Body Solenoids

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8. Remove the bolts (1) holding the wire harness connector to the valve body and solenoids.
9. Using a suitable prying tool, Separate the wire harness connector (2) from the solenoids.
10. Separate the valve body from the transmission.
    NOTE:

    If the valve body is to be reused without disassembling it, store the valve body in a clean area until it is installed.

    Fig 6: Removing/Installing Transmission Range Sensor (TRS) Screw

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11. Remove the Transmission Range Sensor (TRS) screw (1).
    Fig 7: Removing/Installing Transmission Range Sensor

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12. Separate the TRS (1) from the transmission with the wire harness connected.
    Fig 8: Removing/Installing Speed Sensor Screw

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13. Remove the speed sensor screw (1).
    Fig 9: Removing/Installing Speed Sensor

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14. Separate the speed sensor (1) from the transmission with the wire harness connected.
    Fig 10: Fluid Adapter Tubes & O-Ring Seals

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15. Using suitable pliers, remove the fluid adapter tubes (1) from the transmission.
    Fig 11: Bellhousing To Transmission Housing Bolts

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16. From around the perimeter of the transmission, remove the bellhousing bolts (1) holding the bellhousing to the transmission housing.
    Fig 12: Bellhousing To Output Gear Support Bolts

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17. Remove the bellhousing bolts (1) holding the bellhousing to the output gear support.
18. Using wooden blocks to stabilize the transmission on the work surface, position the transmission on the bench with the bellhousing facing upward.
19. Using a suitable pry-bar in the pry point locations, pry upward to dislodge the bellhousing from the transmission housing.
    Fig 13: Removing/Installing Bellhousing At Transmission Housing

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20. Lift the bellhousing (1) upward and separate the assembly from the transmission housing (2).
    Fig 14: Port Seal

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21. Remove the seal (1) from the port in the transmission housing.
    Fig 15: Sealing Surface Of Transmission Housing

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22. Separate the gasket (1) from the sealing surface of the transmission housing (2).
    Fig 16: Removing/Installing Differential Assembly

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23. Remove the differential assembly (1) from the transmission housing.
    Fig 17: Removing/Installing E-Clutch At E-Clutch Hub

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24. Separate the E-clutch from the E-clutch hub and shaft (2).
    Fig 18: Removing/Installing Thrust Bearing At E-Clutch Hub

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25. Separate the thrust bearing (1) from the E-clutch (2) hub.
    Fig 19: E-Clutch Hub And Shaft

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26. Separate the E-clutch hub and shaft (1) from the output gear support (2).
    Fig 20: Output Gear Support

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27. Separate the output gear support (1) from the gear 4 planetary pinion carrier (2).
    Fig 21: Removing/Installing Transfer Gear

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28. Remove the transfer gear from the transmission housing (1).
    Fig 22: Roller Type Thrust Bearing

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29. Separate the roller type thrust bearing (1) from the sun gear 3 and 4 and Dog Clutch-F (2).
    Fig 23: Removing/Installing Sun Gear 3, 4 And Dog Clutch-F At Gear 4 Planetary Pinion Carrier

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30. Separate the sun gear 3 and 4 and Dog Clutch-F (1) from the gear 4 planetary pinion carrier.
    Fig 24: Gear 4 Planetary Pinion Carrier

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31. Separate the gear 4 planetary pinion carrier (1) from the annulus gear 4.
    Fig 25: Annulus Gear 4

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32. Separate the annulus gear 4 from the annulus gear 3 (2).
    Fig 26: Removing Transfer Gear Bearing Cone

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33. Using Puller Press (special tool #C-293-PA, Puller, Press) (1), Adapter Blocks (special tool #9738, Blocks, Adapter) (3) and a suitable socket as a plug (2), remove the transfer gear bearing cone from the transmission housing.
    Fig 27: Thrust Bearing & Annulus Gear 1 Planetary Hub

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34. Separate the thrust bearing (1) from the annulus gear 1 planetary hub (2).
    Fig 28: Annulus Gear 1 Planetary Hub & Carrier Gear 1 And 2

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35. Separate the annulus gear 1 planetary hub (1) from the carrier gear 1&2 (2).
    Fig 29: Thrust Bearing & Annulus Gear 1 Planetary Hub

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36. Separate the thrust bearing (1) from under the annulus gear 1 planetary hub (2).
    Fig 30: Annulus Gear 3 & Snap-Ring

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37. Using a suitable screw driver, remove the snap-ring (1) holding the annulus gear 3 (2).
    Fig 31: Snap-Ring & Annulus Gear 3

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38. Separate the snap-ring from the annulus gear 3 (2).
    Fig 32: Annulus Gear 3 & Carrier Gear 1&2

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39. Separate the annulus gear 3 (1) from the carrier gear 1&2.
    Fig 33: Carrier Gear 1&2 & O-Ring Seal

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40. Remove the O-ring seal (1) from the carrier gear 1&2.
    Fig 34: Carrier Gear, Annulus Gear & D-Clutch Hub

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41. Separate the carrier gear 1&2 (1) annulus gear 2, D-clutch hub and input shaft assembly.
42. Position the transmission housing on a suitable arbor pressure using wooden blocks for support.
    Fig 35: Gaining Access To Snap Ring-Ring & Groove

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43. Using Tool (special tool #8901A, Pressing Tool) (with pressure scale removed (1) and legs (special tool #10428, Adapter, Pressing Tool), Compress the bellville spring to gain access to the snap ring-ring (3) holding the D-clutch piston retainer (2) into the transmission housing (4).
    Fig 36: Prying D-Clutch Piston Retainer Out Of Transmission Housing

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    NOTE:

    The O-ring seal on the D-clutch piston retainer will hang up in the snap-ring groove during removal and will need to be pried out of the transmission housing.

44. Using a suitable pry-bar (1) vise-grip pliers (2) and a brass drift (3) coupled together, pry the D-clutch piston retainer (4) upward and out of the transmission housing.
    Fig 37: D-Clutch Piston Retainer

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45. Separate the D-clutch piston retainer (1) from the transmission housing.
    Fig 38: D-Clutch Piston & Retainer

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46. Remove the D-clutch piston from the retainer.
    Fig 39: D-Clutch Piston, Inner & Outer Seals

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47. Remove the inner (1) and outer (2) lip seals from the D-clutch piston.
    Fig 40: D-Clutch Piston Retainer & O-Ring Seal

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48. Remove the O-ring seal from the D-clutch piston retainer.
    Fig 41: Removing/Installing Bellville Spring

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49. Separate the bellville spring from the transmission housing.
    Fig 42: Annulus Gear 2, D & C-Clutch Hub And Input Shaft Assembly

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50. Separate the annulus gear 2, D and C-clutch hub and input shaft assembly (1) from the transmission housing.
51. Remove the annulus gear 2, D and C-clutch hub from the input shaft and B-clutch.
    Fig 43: Remove/Install Input Shaft Seal-Rings

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52. Remove the seal-rings (1) from the lands (2) on the input shaft (3).
    Fig 44: Input Shaft/Dog Clutch A, B-Clutch Hub & Snap-Ring

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    NOTE:

    Dog clutch A is permanently attached to the input shaft and cannot be disassemble. If the dog clutch A fails an air test, replace the input shaft.

53. Using a suitable snap-ring pliers (3), remove the snap-ring (2) holding the input shaft to the B-clutch (1) hub.
54. Separate the input shaft/dog clutch A from the B-clutch (1) hub.
    Fig 45: Annulus Gear 2, D And C-Clutch Hub/B-Clutch Retainer

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55. Place the annulus gear 2, D and C-clutch hub on tool (special tool #9611, Plug, Differential End) to hold the sun gear in position.
    Fig 46: Remove/Install Snap-Ring

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56. Using a suitable snap-ring pliers (1), remove the snap-ring (2) holding the sun gear 1 to the annulus gear 2, D and C-clutch hub.
    Fig 47: Annulus Gear 2, D And C-Clutch Hub (3) & Sun Gear 1

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57. Turn the annulus gear 2 (2), D and C-clutch hub (3) over and remove the sun gear 1 (1).
    Fig 48: Annulus Gear 2, D-Clutch Hub & C-Clutch Hub

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58. Separate the Annulus gear 2, D-clutch hub (1) from the C-clutch hub.
    Fig 49: Thrust Bearing & C-Clutch Hub

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59. Separate the thrust bearing (1) from the C-clutch hub (2).
    Fig 50: Thrust Bearing & Input Shaft Rear Support

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60. Remove the thrust bearing (1) from the input shaft rear support.
    Fig 51: Removing/Installing Input Shaft Rear Support Selective Thrust Washer

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61. Remove the input shaft rear support selective thrust washer (1).
    Fig 52: Removing D-Clutch Friction Discs & Steel Plates From Transmission Housing

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62. Separate the D-clutch friction discs and steel plates (1) from the transmission housing.
    Fig 53: Removing Snap-Ring

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63. Using two suitable screw drivers, lift (2) the snap-ring (1) and pry it inward (3) and out of from the groove in the transmission housing.
    Fig 54: Removing C-Clutch Friction Discs & Steel Plates From Transmission Housing

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64. Separate the C-clutch friction discs and steel plates (1) from the transmission housing.
    Fig 55: C-Clutch Bellville Spring & Special Tool

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65. Place the tool (special tool #10504, Compressor, Spring) (1) over the C-clutch bellville spring at the bottom of the transmission housing.
    Fig 56: C-Clutch Bellville Spring & Special Tools

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66. Place tool (special tool #8228, Installer, Bearing) (3) over the input shaft support (tool 8901 with 10428 legs can also be used), compress the bellville spring to gain access to the stepped snap-ring (1).
    Fig 57: Removing/Installing Snap-Ring

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67. Using a suitable screw driver, remove the snap-ring (1) holding the C-clutch bellville spring in the transmission housing.
    Fig 58: C-Clutch Bellville Spring & C-Clutch Piston

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68. Separate the C-clutch bellville spring (1) from the C-clutch piston (2).
    Fig 59: Removing/Installing C-Clutch Piston

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69. Using a suitable pliers (2), remove the C-clutch piston (1) from the transmission housing.
    Fig 60: C-Clutch Piston & Seals

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70. If overhaul is being performed, remove inner (1) and outer (2) seals from the C-clutch piston.
    Fig 61: Removing/Installing Inner Seal-Rings

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71. Using a suitable hook tool, remove the inner seal-rings (1) from the input shaft support.
    Fig 62: Removing/Installing Outer Seal-Rings

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72. Using a suitable hook tool, remove the outer seal-rings (1) from the input shaft support.
    Fig 63: Removing/Installing Split Roller Bearing

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73. Using a suitable hook tool, remove the split roller bearing (1) from the input shaft support.