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.
WARNING:
Always wear safety glasses when cleaning, disassembling and assembling the transmission/transaxle. Contents of the transmission/transaxle can become projectiles (e.g., springs, snap-rings, as well as metal and other debris). Failure to wear safety glasses may result in severe personal injury.
CAUTION:
Tag all snap rings, thrust washers, washers, spacers and thrust bearings, etc. during disassembly for quick identification and assembly. Failure to follow these instructions will damage and cause transmission failure.
- Before disassembling the transmission, remove any oily grime and loose dirt. Place the transmission on a clean work surface with ample fluid drainage or absorbency.
- Remove the clip (2) holding the transmission solenoid connector (1) in the valve body cover pan.
- Remove the valve body cover pan bolts (1) and the valve body cover pan.
- Remove the ten bolts (1) holding the valve body to the transmission housing.
- Using a suitable prying tool, pry the valve body away from the adapter tubes.
- Remove the Transmission Range Sensor (TRS) screw (1).
- Separate the TRS (1) from the transmission with the wire harness connected.
- Remove the speed sensor screw (1).
- Separate the speed sensor (1) from the transmission with the wire harness connected.
- 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.
- Using suitable pliers, remove the fluid adapter tubes (1) from the transmission.
- From around the perimeter of the transmission, remove the bellhousing bolts (1) holding the bellhousing to the transmission housing.
- Remove the bellhousing bolts (1) holding the bellhousing to the output gear support.
- Using wooden blocks to stabilize the transmission on the work surface, position the transmission on the bench with the bellhousing facing upward.
- Using a suitable pry-bar in the pry point locations, pry upward to dislodge the bellhousing from the transmission housing.
- Lift the bellhousing (1) upward and separate the assembly from the transmission housing (2).
- Remove the seal (1) from the port in the transmission housing.
- Separate the gasket (1) from the sealing surface of the transmission housing (2).
- Remove the differential assembly (1) from the transmission housing.
- Separate the E-clutch drum (1) from the E-clutch assembly (2).
- Separate the thrust bearing (1) from the E-clutch assembly.
- Separate the E-clutch hub (1) from the output gear support (2).
- Separate the output gear support (1) from the gear 4 planetary pinion carrier (2).
- Remove the transfer gear (1) from the transmission housing.
- Separate the roller type thrust bearing (1) from the sun gear 3 and 4 and Dog Clutch-F (2).
- Separate the sun gear 3 and 4 and Dog Clutch-F (1) from the gear 4 planetary pinion carrier.
- Separate the gear 4 planetary pinion carrier (1) from the annulus gear 4.
- Separate the annulus gear 4 (1) from the annulus gear 3 (2).
- Using the (special tool #C-293-PA, Puller, Press) (1), (special tool #9738, Blocks, Adapter) (3) and a suitable socket as a plug (2), remove the transfer gear bearing cone from the transmission housing.
- Separate the trust bearing (1) from the annulus gear 1 planetary hub (2).
- Separate the annulus gear 1 planetary hub (1) from the carrier gear 1 and 2 (2).
- Separate the thrust bearing (1) from under the annulus gear 1 planetary hub (2).
- Using a suitable screw driver, remove the snap-ring (1) holding the annulus gear 3 (2).
- Separate the snap-ring (1) from the annulus gear 3 (2).
- Separate the annulus gear 3 (1) from the carrier gear 1 and 2.
- Remove the O-ring seal (1) from the carrier gear 1 and 2.
- Separate the carrier gear 1 and 2 (1) annulus gear 2, D-clutch hub and input shaft assembly.
- Position the transmission housing on a suitable arbor press using wooden blocks for support.
- Using (special tool #8901A, Pressing Tool) (1) (with pressure scale removed) and (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).
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.
- 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.
- Remove the D-clutch piston (2) from the retainer (1).
- Remove the inner (1) and outer (2) lip seals from the D-clutch piston.
- Remove the O-ring seal (2) from the D-clutch piston retainer (1).
- Separate the bellville spring (1) from the transmission housing (2).
- Separate the annulus gear 2, D and C-clutch hub and input shaft assembly (1) from the transmission housing.
- Remove the annulus gear 2, D and C-clutch hub from the input shaft and B-clutch.
- Remove the seal-rings (1) from the lands (2) on the input shaft (3).
NOTE:
Dog clutch A is permanently attached to the input shaft and cannot be disassembled.
- Using suitable snap-ring pliers (3), remove the snap-ring (2) holding the input shaft to the B-clutch (1) hub.
- Separate the input shaft/dog clutch A from the B-clutch (1) hub.
- Place the annulus gear 2, D and C-clutch hub (1) on tool (special tool #9611, Plug, Differential End) (2) to hold the sun gear in position.
- 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.
- Turn the annulus gear 2 (2), D and C-clutch hub (3) over and remove sun gear 1 (1).
- Separate the Annulus gear 2, D-clutch hub (1) from the C-clutch hub (2).
- Separate the thrust bearing (1) from the C-clutch hub (2).
- Remove the thrust bearing (1) from the input shaft rear support.
- Remove the input shaft rear support selective thrust washer (1).
- Separate the D-clutch friction discs and steel plates (1) from the transmission housing.
- Using two suitable screw drivers (2) and (3), lift the snap-ring (1) and pry it inward with the screwdriver (3) and out of from the groove (1) in the transmission housing.
- Separate the C-clutch friction discs and steel plates (1) from the transmission housing.
- Place the (special tool #10504, Compressor, Spring) (1) over the C-clutch bellville spring at the bottom of the transmission housing.
- 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).
- Using a suitable screw driver, remove the snap-ring (1) holding the C-clutch bellville spring in the transmission housing.
- Separate the C-clutch bellville spring (1) from the C-clutch piston (2).
- Using suitable pliers (2), remove the C-clutch piston (1) from the transmission housing.
- If overhaul is being performed, remove inner (1) and outer (2) seals from the C-clutch piston (3).
- Using a suitable hook tool, remove the inner seal-rings (1) from the input shaft support.
- Using a suitable hook tool, remove the outer seal-rings (1) from the input shaft support.
- Using a suitable hook tool, remove the split roller bearing (1) from the input shaft support.