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© 2022 Eaton Cummins Automated Transmission Technologies. All rights reserved.
2022.10.7
Transmission Harness | Removal and Installation TRSM0940
Transmission Harness Removal
Caution: The battery negative must be disconnected prior
to disconnecting the 38-way Transmission Electronic Con-
trol Unit (TECU) Connector and 38-way Vehicle Harness
Connector from the TECU.
Caution: Do not allow contamination into the TECU or con-
nectors.
1. Disconnect the following connectors:
• Using a 5/32” hex wrench, unscrew and disconnect
the Transmission Harness 38-way Connector and
Vehicle Interface 38-way Connector.
2. Disconnect the following harness connectors:
• Input Shaft Speed Sensor
• Main Shaft Speed Sensor
• Gear Select Sensor and Rail Select Sensor
• Output Shaft Speed Sensor
• Range Valve Solenoids
• ECA Speed Sensor
• 8-way ECA Connector
• X-Y Shifter
Transmission Harness Installation
Caution: Do not allow contamination into the TECU connec-
tors.
Caution: Do not over tighten cable ties.
Caution: You need to leave a service loop in the Transmis-
sion Harness.
Caution: Do not put sharp bends in the Transmission Har-
ness.
Caution: The battery negative must be disconnected, while
installing the 38-way Transmission Electronic Control Unit
(TECU) Connector and 38-way Vehicle Harness Connector
from the TECU.
1. Reconnect the following harness connectors:
• Gear Select and Rail Select Sensor
• Main Shaft Speed Sensor
• Input Shaft Speed Sensor
• Output Shaft Speed Sensor
• ECA Speed Sensor
• 8-way ECA Connector
• X-Y Shifter
• Range Valve Solenoids
2. Using a 5/32” hex wrench, reconnect the Transmission
Harness 38-way Connector and tighten to 25 +/- 3 lb-in
(2.82 +/- 0.33 N•m).
Caution: Do not exceed the torque on the Transmission
Harness or Vehicle Harness Connector or bolt failure
will occur.
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