Installation 8HP90

CAUTION:

The Transmission Control Module (TCM), or Transmission Control Module Assembly (TCMA) is extremely sensitive to Electrostatic Discharge (ESD). Always use a ground strap and follow the ESD guidelines in ELECTROSTATIC DISCHARGE (ESD) SENSITIVE DEVICES. Failure to follow these instructions may result in damage to the TCM/TCMA.

Fig 1: Fluid Port, Two O-Rings, Compression Seal

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Install the fluid port (1) with NEW O-rings (2) and seal (3) to the valve body.

Fig 2: Valve Body Alignment Pins
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Install the valve body assembly to the transmission using the previously installed (1) (special tool #10379, Pins, Valve Body Alignment) as a guide.
Use an appropriate tool on one of the alignment pins to assist in holding the valve body in position while installing the remaining fasteners.

Fig 3: Valve Body Bolts Loosening And Tightening Sequence
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Install the valve body assembly bolts not including 16-18 and hand tighten.
Remove the pins and install the remaining bolts.

Fig 4: Remover/Installer, Guide Sleeve, Electrical Harness Insulator & Transmission Case
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Using (special tool #10377, Remover/Installer, Guide Sleeve) (1) carefully install the electrical harness insulator (2) to the transmission case (3).

Fig 5: Valve Body Assembly End Retainer Bolts
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Lock the electrical connector lock (2) to the internal harness end.
Install the speed sensor (4) to the case install the speed sensor bolt (1) and tighten to the proper SPECIFICATIONS .

Fig 6: Hydraulic Impulse Storage Unit & Bolts
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If equipped, install the Hydraulic Impulse Oil Storage (HIS) accumulator (1).
Tighten the bolts (2 and 3) to the proper SPECIFICATIONS .
Connect the HIS wire harness connector.
Install the valve body assembly end bolts (3) and hand tighten.

Fig 7: Valve Body Bolts Loosening And Tightening Sequence
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Tighten the valve body bolts in the sequence shown to 6 Nm (53 in.-lbs.).

Fig 8: Manual Park Release Lever Retaining Nut & Lever
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Remove the tie strap and return the Manual Park Release (MPR) lever (1) to the original position, tighten the MPR lever nut (2) to the proper SPECIFICATIONS .

Fig 9: Transmission Oil Filter
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Install the transmission oil filter (1).

Fig 10: Transmission Oil Pan & Bolts
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Install the transmission oil pan gasket, the oil pan (2) and the bolts (1).

Fig 11: Oil Pan Retaining Bolts Tightening Sequence
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Tighten the transmission oil pan bolts to 10 Nm (89 in.-lbs.) in the sequence shown.

Fig 12: Adapter Plug Connector
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Connect the transmission wire harness connector (1).

Fig 13: Locking Mechanism Lock & Adapter Plug Connector
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Turn the locking mechanism (1) of the transmission wire harness connector clockwise to lock it in place.
If the valve body is replaced, program the TCM. Refer to STANDARD PROCEDURE .
Perform the TRANSMISSION FILL AFTER SERVICE procedure. Refer to FLUID AND FILTER, STANDARD PROCEDURE .
Perform the TRANSMISSION VERIFICATION TEST. Refer to STANDARD PROCEDURE .