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.

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

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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.

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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.

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Using (special tool #10377, Remover/Installer, Guide Sleeve) (1) carefully install the wire harness insulator (2) to the transmission case (3).

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Lock the wire harness connector lock (2) to the internal wire harness end.
Install the speed sensor (4) to the case install the speed sensor bolt (1) and tighten to the proper. Refer to TECHNICAL SPECIFICATIONS, 8HP70 ,TECHNICAL SPECIFICATIONS, 8HP50/850RE , TECHNICAL SPECIFICATIONS, 8HP90 .

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If equipped, install the Hydraulic Impulse Oil Storage (HIS) accumulator (1).
Tighten the bolts (2 and 3) to the proper. Refer to TECHNICAL SPECIFICATIONS, 8HP70 ,TECHNICAL SPECIFICATIONS, 8HP50/850RE , TECHNICAL SPECIFICATIONS, 8HP90 .
Connect the HIS wire harness connector.
Install the valve body assembly end bolts (3) and hand tighten.

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Tighten the valve body bolts in the sequence shown to 6 Nm (53 in.-lbs.).

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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. Refer to TECHNICAL SPECIFICATIONS, 8HP70 ,TECHNICAL SPECIFICATIONS, 8HP50/850RE , TECHNICAL SPECIFICATIONS, 8HP90 .

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Install the transmission oil filter (1).

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Install the transmission oil pan gasket, the oil pan (2) and the bolts (1).

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Tighten the transmission oil pan bolts to 4 N.m (35 in. lbs.) + 45° in the sequence shown.

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Connect the transmission wire harness connector (1).

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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 Transmission Control Module (TCM). Refer to 8HP45/845RE AUTOMATIC TRANSMISSION - PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE, TRANSMISSION VERIFICATION TEST & TCM ADAPTATION , 8HP70 AUTOMATIC TRANSMISSION - PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE, TRANSMISSION VERIFICATION TEST & TCM ADAPTATION , 8HP90 AUTOMATIC TRANSMISSION - PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE, TRANSMISSION VERIFICATION TEST & TCM ADAPTATION .
Perform the TRANSMISSION FILL AFTER SERVICE procedure. Refer to FLUID AND FILTER, STANDARD PROCEDURE, 8HP50/850RE ,FLUID AND FILTER, STANDARD PROCEDURE, 8HP70 , FLUID AND FILTER, STANDARD PROCEDURE, 8HP90 .
Perform the TRANSMISSION VERIFICATION TEST. Refer to 8HP45/845RE AUTOMATIC TRANSMISSION - PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE, TRANSMISSION VERIFICATION TEST & TCM ADAPTATION , 8HP70 AUTOMATIC TRANSMISSION - PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE, TRANSMISSION VERIFICATION TEST & TCM ADAPTATION , 8HP90 AUTOMATIC TRANSMISSION - PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE, TRANSMISSION VERIFICATION TEST & TCM ADAPTATION .