Installation - 8HP70: Installation

WARNING: This page is about a different car, the 2021 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.

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 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 transmission case.

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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 by hand, excluding bolts 16-18.
Remove the pins and install the remaining bolts.

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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).

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Lock the electrical connector lock (2) to the internal harness end.
Install the rear valve body retaining bolts (3) and hand tighten.

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When installing the Output Speed Sensor (OSS) into the case, take care to position the OSS guide pin as shown or DAMAGE to the sensor may result.
NOTE:
This is the INCORRECT alignment of the pin.

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This is the CORRECT installation and pin alignment.

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Install the OSS to the case and then install the OSS bolt (1) and hand tighten.

Fig 1: Valve Body Bolts Tightening Sequence
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Tighten the valve body bolts in the sequence shown in illustration to 7 N.m (62 in. lbs.).

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If equipped, install the Hydraulic Impulse Oil Storage (HIS) accumulator (1).
Tighten the bolts (2 and 3) to the proper torque specification. Refer to TORQUE SPECIFICATIONS .
Connect the HIS wire harness connector.

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Remove the tie strap (3).

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Return the Manual Park Release (MPR) lever (1) to the original position, tighten the fastener (2) to the proper torque specification. Refer to TORQUE SPECIFICATIONS .

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Connect the MPR cable (1) to the lever (2).

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Install the oil pan and gasket.
Install the transmission oil pan bolts and tighten the fasteners in the sequence shown in illustration to the proper torque specification. Refer to TORQUE SPECIFICATIONS .

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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 (2) clockwise to lock it in place.
If the valve body is replaced, program the TCM. Refer to MODULE, TRANSMISSION CONTROL (TCM), MODULE PROGRAMMING .
Perform the TRANSMISSION FILL AFTER SERVICE procedure. Refer to STANDARD PROCEDURE - TRANSMISSION FILL AFTER SERVICE .
Perform the TRANSMISSION VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST, 8HP50/850RE or refer to TRANSMISSION VERIFICATION TEST, 8HP70 .