Endurant HD
TRSM0950 EN-US
|
December 2024 - A

Mechatronic Transmission Module (MTM)

Special Instructions

When replacing original equipment MTM with a new/replacement MTM, locate new/replacement MTM part information tag and record Part Number and Serial Number for future reference in this procedure.

_Graphics/_LineArt/MTM_SerialTagLocation.png
  • Part Number
  • Serial Number

NOTICE: Ensure vehicle air system provides proper transmission air supply and air quality, refer to Vehicle Maintenance Recommendations. Failure to provide proper transmission air supply and air quality results in degraded transmission performance and transmission component damage.

Note: For EHD-xxF112C-N transmission models with TCM software 5516034, contact Eaton Cummins Automated Transmission Technologies at +1-800-826-4357 for further diagnostic instructions.

Special Tools

  • Mechanical Diagnostic Kit (RR2011TR)
  • Gasket Sealant (Loctite 5188)
  • Plastic Scraper
  • Non-Chlorinated Brake Cleaner (Gasket Remover)
    Danger
    Do not handle non-chlorinated brake cleaner until all manufacturer precautions have been read and understood. Failure to follow precautions will result in serious personal injury or death.
    Caution
    Avoid contact between non-chlorinated brake cleaner and the transmission plastic components, electrical wiring and connectors. Failure to avoid contact will result in transmission component damage.

Component Identification

_Graphics/_Raster/TRSM0950_MTM_ID.png

1. MTM Cap Screws, Long (x4) - 13 mm

2. MTM Cap Screws, Special (x2) - 15 mm

3. MTM Cap Screws (x14) - 13 mm

4. Mechatronic Transmission Module (MTM)

5. Main Housing

6. Output Speed Sensor

Create a Service Activity Report

Note: If not already created and sent.

  1. Key on with engine off.

  2. Connect ServiceRanger and create a Service Activity Report.

  3. Select “Send to Eaton” (internet connection required)

  4. Disconnect ServiceRanger.

  5. Key off.

Drain Oil

  1. Locate the Oil Drain Plug on the back of the rear housing.

  2. Place a suitable container under the Oil Drain Plug.

    Note: If reusing oil, use a clean container free of contamination and debris.

  3. Remove the Oil Drain Plug with a 6 mm hex key and drain the oil.

    _Graphics/_Raster/TRSM0950_OilDrain_R1.png

  4. If PTO-equipped, remove PTO and drain the oil.

  5. Inspect Oil Drain Plug and O-ring for damage. If damaged, replace the Oil Drain Plug; O-ring is serviced with plug.

  6. Install the Oil Drain Plug (6 mm) and torque to 24.5-29.5 Nm (18-22 lb-ft).

    Notice
    Do not over-torque drain plug or transmission damage may occur.
    _Graphics/_Raster/TRSM0950_OilDrain_R2.png

Manually Vent Linear Clutch Actuator (LCA)

  1. Key off.

  2. Set vehicle parking brake and chock wheels.

    Warning
    Apply vehicle parking brake and follow vehicle manufacture parking instructions. Failure to follow these instructions could cause unintended vehicle movement and may result in major vehicle component damage, severe injury of death.

  3. Loosen the 4 Linear Clutch Actuator (LCA) cap screws 1-2 turns each with a T45 Torx.

    Note: Residual air pressure in the LCA cylinder exhausts between the LCA and Mechatronic Transmission Module (MTM) housing when the cap screws are loosened.

    _Graphics/_LineArt/TRSM0950_LCA_Venting_LoosenBolts.png

  4. Tighten the 4 LCA to MTM T45 cap screws and torque to 23-27 Nm (17-21 lb-ft).

Remove the Transmission

  1. Disconnect negative battery cable.

  2. Refer to OEM guidelines for transmission removal.

Remove the Release Bearing and Clutch Release Yoke

  1. Remove the Release Bearing by sliding the bearing off the input shaft.

    _Graphics/_Raster/TRSM0950_ReleaseBearingYoke_Installation3.png

  2. Pull to free the lower Clutch Release Yoke socket from the lower pivot on the clutch housing.

    _Graphics/_Raster/TRSM0950_ReleaseBearingYoke_Removal2.png

  3. Pull to free the upper Clutch Release Yoke socket from the Linear Clutch Actuator (LCA) rod end.

    _Graphics/_Raster/TRSM0950_ReleaseBearingYoke_Removal3.png

  4. Inspect the plastic socket inserts in the Clutch Release Yoke to verify none of the fingers are missing or damaged.

    Note: If the plastic insert is damaged, replace the Clutch Release Yoke assembly.

    _Graphics/_Raster/TRSM0950_ReleaseBearingYoke_Removal5.png_Graphics/_Raster/TRSM0950_ReleaseBearingYoke_Removal6.png

Remove the Transmission Control Module (TCM)

  1. Unscrew the 4 TCM Cover nuts and remove TCM Cover.

    Note: TCM Cover nuts are 10 or 13 mm.

    _Graphics/_Raster/TRSM0950_TCM_Removal3.png

  2. Unscrew the TCM 7 mm Jackscrew. Lift and remove the TCM from the MTM.

    Notice
    Do not allow contamination into the connectors on the TCM or MTM.
    _Graphics/_Raster/TRSM0950_TCM_Removal4.png

  3. Inspect the TCM Seal for damage.

    Notice
    Replace the TCM Seal if damaged.

    Note: If replacing the TCM, the REMAN TCM includes a new seal.

    _Graphics/_Raster/TRSM0950_TCM_Installationa.png

Remove the Mechatronic Transmission Module (MTM)

  1. Lift the latch on the Output Speed Sensor Harness at the Connector on the Mechatronic Transmission Module (MTM).

    _Graphics/_Raster/IMG_0341.png_Graphics/_Raster/IMG_0342.png

  2. Remove the Output Speed Sensor Harness from the Connector on the MTM.

    _Graphics/_Raster/IMG_0343.png

  3. Remove the 20 MTM cap screws.

    Note: 13 mm (x18), 15 mm (x2).

    _Graphics/_Raster/IMG_0346.png

  4. Separate the MTM from the Main Housing at the 2 pry points.

    _Graphics/_Raster/IMG_0348.png_Graphics/_Raster/IMG_0350.png

  5. Remove the MTM from the transmission housing.

    Caution
    MTM weighs approximately 40 lbs. Keep fingers clear of pinch point between MTM and other surfaces. Dropping MTM could result in component damage and/or personal injury.
    _Graphics/_Raster/TRSM0950_MTM_Removal7.png

Install the Mechatronic Transmission Module (MTM)

Note: If replacing original equipment MTM with new/replacement MTM locate new/replacement MTM part information tag and record Part Number and Serial Number. Refer to Component Identification section. Part Number and Serial Number are required to properly configure TCM after MTM installation.

  1. Place the transmission in a horizontal position.

    Notice
    The transmission must be in a horizontal position prior to the MTM Installation procedure. Failure to do so causes the sliding clutches to move out of neutral and not align to the shift yokes. If the shift yokes are not aligned to the sliding clutches, position sensor fault codes set Active and the transmission will not shift out of neutral.

  2. Clean the sealing surfaces on the transmission and Mechatronic Transmission Module (MTM) with gasket remover and a plastic scraper. Let air dry then wipe with a clean dry cloth.

    Notice
    Do not use abrasive scrapers or powered tools to clean sealing surfaces or sealing surfaces may be damaged and leak.

  3. Inspect threaded bolt holes for debris and clean if necessary.

    Notice
    Ensure there is nothing in the threaded bolt holes or the transmission may be damaged when cap screws are tightened.

  4. Install the Rail B Engagement Tool (RR1088TR) to the Main Housing

  5. Install and hand tighten 2 MTM cap screws leaving a 3.175 mm (1/8 inch) gap between the cap screws and tool base.

    Notice
    Hand tighten cap screws only, do not over torque. Rail B Engagement Tool must remain loose to ensure complete movement of the synchronizer sliding sleeve. Over torqued cap screws result in binding between tool and sliding sleeve.
    _Graphics/_Raster/IMG_0354.png

  6. Shift the Rail B Synchronizer to neutral.

    _Graphics/_Raster/IMG_0362.png

  7. Remove the Rail B Engagement Tool.

  8. Move Rail C and Rail D sliding clutches to neutral.

    Notice
    The transmission must be in a horizontal position prior to the MTM Installation procedure. Failure to do so causes the sliding clutches to move out of neutral and not align to the shift yokes. If the shift yokes are not aligned to the sliding clutches, position sensor fault codes set Active and the transmission will not shift out of neutral.
    _Graphics/_Raster/IMG_0369.png

  9. Install the Confirm-Neutral Gauge (RR1086TR-2) into the slots of the synchronizer and sliding clutches.

    _Graphics/_Raster/IMG_0355.png_Graphics/_Raster/IMG_0365.png

  10. Install the MTM Alignment Tool (RR1086TR-1) onto the main housing.

    _Graphics/_Raster/IMG_0356.png_Graphics/_Raster/IMG_0366.png

  11. Verify synchronizer and sliding clutches are in neutral by sliding Confirm-Neutral Gauge into the slots of MTM Alignment Tool.

    Note: If the gauge does not slide into the alignment tool slots, neutral is not achieved. Go to Step 4.

    _Graphics/_Raster/IMG_0358.png_Graphics/_Raster/TRSM0950_MTM_Ins6.png

  12. Using the Rail E Lever, move Rail E to neutral.

    _Graphics/_Raster/IMG_0370.png_Graphics/_Raster/TRSM0950_MTM_Ins11.png_Graphics/_Raster/TRSM0950_MTM_Ins12.png

  13. Verify Rail E is in neutral using the Gear Side Actuator end of the Confirm-Neutral Gauge (RR1088TR-2) at Shift Rail E. Rail E is in neutral when end of gauge rests against housing with rail against notch-end of gauge.

    _Graphics/_Raster/IMG_0373.png

  14. Move Shift Rail B in the MTM to neutral. Rail B is in neutral when the ball detent is in the notch of the Rail B yoke assembly.

    _Graphics/_Raster/TRSM0950_MTMRailB_N.png

  15. Move Shift Rails C and D in the MTM to neutral. Rails C and D are in neutral when the shift inter-lock is aligned with the notches of the rail yoke assemblies.

    _Graphics/_Raster/TRSM0950_MTMRailsCD_N.png

  16. Verify MTM is in neutral. Install the MTM Alignment Tool (RR1086TR-1) into the bolt hole and onto Rail B, C, and D Shift Yokes.

    Note: If the MTM Alignment Tool slots do not align with the 3 shift yokes, neutral has not been achieved. Go to Step 13.

    _Graphics/_Raster/IMG_0378.png

  17. Inspect and confirm orientation of notch on Rail E as shown in image below (notch facing up when MTM is installed on transmission). If not in orientation shown, rotate Rail E as needed.

    Notice
    If notch on Rail E is facing down when MTM is installed on transmission, Fault Code 320 (SPN 5942) sets Active and transmission does not shift out of neutral.
    _Graphics/_LineArt/TRSM0950_RailENotch.png

  18. Verify Rail E is in neutral using the Fork Side Actuator end of the Confirm-Neutral Gauge (RR1088TR-2) at Shift Rail E. Rail E is in neutral when end of gauge rests against cover with rail against notch-end of gauge.

    Note: If Rail E is not in neutral, slide rail in or out until neutral is achieved.

    _Graphics/_Raster/TRSM0950_MTMRailE_N.png

  19. Slide O-ring over the MTM front alignment pin on the main housing until fully seated in the groove.

    _Graphics/_Raster/TRSM0950_MTM_O-ring.png

  20. Clean the sealing surfaces on the transmission and Mechatronic Transmission Module (MTM) with gasket remover and a plastic scraper. Let air dry then wipe with a clean dry cloth.

    Notice
    Do not use abrasive scrapers or powered tools to clean sealing surfaces or sealing surfaces may be damaged and leak.

  21. Apply gasket sealant with a bead width of 1.4-2.4mm (0.055-0.094 inch) to the transmission housing sealing surface following the pattern below.

    Notice
    Ensure there is nothing in the threaded bolt holes or the transmission may be damaged when cap screws are tightened.

    Note: Parts must be assembled within 10 minutes of applying Gasket Sealant.

    _Graphics/_LineArt/TRSM0950_MTMRTV.png

  22. Install MTM onto the transmission housing. Align Rail E in the MTM with the Rail E Shift Rail in the Main Housing.

    Caution
    MTM weighs approximately 40 lbs. Keep fingers clear of pinch point between MTM and other surfaces. Dropping MTM could result in component damage and/or personal injury.
    Notice
    If the MTM is installed on the transmission and Rail E in the MTM is not aligned with Rail E in the Main Housing, Fault Code 320 (SPN 5942) sets Active and the transmission will not shift out of neutral.

  23. Install 20 MTM cap screws and torque to 44.5-51.5 Nm (33-38 lb-ft) in a criss-cross pattern.

    Note: 13 mm (x18), 15 mm (x2) cap screws.

    _Graphics/_Raster/IMG_0387.png

Install the Transmission Control Module (TCM)

Notice
Do not allow contamination into the connectors on the TCM or MTM.

Note: TCM can be installed with transmission in-vehicle.

  1. Install the TCM Seal on the 74-Way Harness Connector.

    _Graphics/_Raster/TRSM0950_TCM_Installationa.png

  2. Align the TCM to the 74-Way Harness Connector and TCM studs, then install the TCM.

    _Graphics/_Raster/TRSM0950_TCM_Installationb.png

  3. Torque the TCM 7 mm Jackscrew to 3.0-4.0 Nm (26.6-35.4 lb-in).

    _Graphics/_Raster/IMG_0187.png

  4. Install the TCM Cover over the 4 TCM studs and torque the 4 TCM Cover Nuts to 8.8-10.4 Nm (78-92 lb-in) in a criss-cross pattern.

    Note: TCM Cover nuts are 10 or 13 mm.

    _Graphics/_Raster/IMG_0189.png

Remove the Linear Clutch Actuator (LCA)

  1. Loosen the 4 LCA cap screws 1-2 turns each with a T45 Torx.

    Notice
    Ensure key is off, 20-Way TCM Vehicle and Body Harness Connectors are disconnected, and 5 minutes has passed prior to LCA removal.

    Note: Residual air pressure in the LCA cylinder exhausts between the LCA and MTM housing when the cap screws are loosened.

    _Graphics/_Raster/TRSM0950_LCA_R1.png

  2. Remove the 4 LCA cap screws

  3. Remove the LCA from the MTM.

    Note: LCA piston rod end is seated in the release yoke socket; pull to release rod end from socket.

    _Graphics/_Raster/IMG_8326.png

  4. Inspect the plastic socket insert in the release yoke through the LCA opening using a flashlight to verify none of the fingers are missing or damaged.

    Note: If the plastic insert is damaged, replace the release yoke assembly.

    _Graphics/_Raster/TRSM0950_LCA_R3.png

Reset and Install Linear Clutch Actuator (LCA)

  1. Inspect LCA to determine next steps, reference images below:

    • If LCA is locked in the reset position, go to Install Linear Clutch Actuator (LCA).
    • If LCA is not locked in the reset position, go to Step 2.

    Locked in Reset Position

    Not Locked in Reset Position

    _Graphics/_Raster/ResetLCA_Step1IMG.png

  2. Place LCA push rod on a clean, flat surface. Tightly grasp LCA housing with both hands and push down on push rod to lock LCA into the reset position.

    Caution
    A large amount of force is required to lock the LCA into the reset position. Failure to tightly grasp the LCA housing with both hands while pushing down on push rod may cause unintended movement resulting in personal injury and/or component damage.
    _Graphics/_Raster/ResetLCA_Step2IMG.jpg

  3. Inspect LCA to determine next steps, reference images below:

    • If LCA remains locked in the reset position, go to Step 4.
    • If LCA does not remain locked in the reset position, go to Step 2, repeat reset procedure.

      Note: If LCA cannot be locked into the reset position, replace LCA.

    Caution
    Do not drop LCA. Dropping LCA may cause the LCA to unlock resulting in personal injury and/or component damage.

    Locked in Reset Position

    Not Locked in Reset Position

    _Graphics/_Raster/ResetLCA_Step3IMG.png

  4. Clean all sealing surfaces on the MTM and LCA with a lint free cloth.

    Notice
    Do not use abrasive scrapers or powered tools to clean sealing surfaces or sealing surfaces may be damaged and leak.

  5. Insert the LCA into the MTM.

    _Graphics/_Raster/IMG_8328.png

  6. Install 4 LCA T45 cap screws and torque to 23-28 Nm (17-21 lb-ft) in a criss-cross pattern.

    _Graphics/_Raster/TRSM0950_LCA_I2.png

Install the Release Bearing and Clutch Release Yoke

  1. Install the upper Release Yoke socket over the rod end of the Linear Clutch Actuator (LCA) and press until attached.

    _Graphics/_Raster/TRSM0950_ReleaseBearingYoke_Removal3.png

  2. Install the lower Release Yoke socket over the lower pivot on the clutch housing and press until attached.

    _Graphics/_Raster/TRSM0950_ReleaseBearingYoke_Installation1.png

  3. Slide the Release Bearing over the input shaft and into the Release Yoke.

    _Graphics/_Raster/TRSM0950_ReleaseBearingYoke_Installation3.png

Install the Transmission

  1. Refer to OEM guidelines for transmission installation.

  2. Connect negative battery cable.

Fill Oil

Note: Perform the transmission fill procedure with transmission installed in vehicle to ensure proper transmission angle.

  1. Remove the Oil Fill Plug with a 6 mm hex key.

    _Graphics/_Raster/TRSM0950_OilFill_I1_wCallout.png

  2. Place a suitable container under the Oil Check Plug and remove the Oil Check Plug with a 6 mm hex key.

    _Graphics/_Raster/TRSM0950_OilFill_I2.png

  3. Fill the transmission with PS-386 lube until a small amount of oil runs out of the Oil Check Plug hole.

    Note: Fill capacity is approximately 7.5-8.5 liters (16-18 pints) depending on the transmission angle.

    _Graphics/_Raster/TRSM0950_OilFill_I3.png_Graphics/_Raster/TRSM0950_OilFill_I4.png

  4. Inspect Oil Check Plug and O-ring for damage. If damaged, replace the Oil Check Plug; O-ring is serviced with plug.

  5. Install the Oil Check Plug (6 mm) and torque to 24.5-29.5 Nm (18-22 lb-ft).

    Notice
    Do not over-torque the Oil Fill Plug or transmission damage may occur.
    _Graphics/_Raster/TRSM0950_OilFill_I2.png

  6. Inspect Oil Fill Plug and O-ring for damage. If damaged, replace the Oil Fill Plug; O-ring is serviced with plug.

  7. Install the Oil Fill Plug (6 mm) and torque to 24.5-29.5 Nm (18-22 lb-ft).

    Notice
    Do not over-torque the Oil Fill Plug or transmission damage may occur.
    _Graphics/_Raster/TRSM0950_OilFill_I1.png

Determine installation of New/Replacement or Original Equipment MTM

  1. Determine next step:

Configure MTM Type

Overview

To ensure proper transmission operation after new/replacement MTM installation, TCM and MTM need to be properly configured. To complete Configure MTM Type procedure, MTM part number and serial number, and TCM software part number are required.

  1. Key off.

  2. Set vehicle parking brake and chock wheels.

  3. Record MTM Part Number and MTM Serial Number installed on transmission.

    _Graphics/_LineArt/MTM_SerialTagLocation.png

    1. MTM Part Number

    2. MTM Serial Number

  4. Key on with engine off.

  5. Connect ServiceRanger.

  6. Go To “Programming”.

  7. Record TCM Software Part Number listed under “Software Information”.

    _Graphics/_LineArt/TRSM0950_MTMServProc_Table1.png

  8. Compare TCM Software Part Number recorded in Step 7 to table:

    Notice
    For EHD-xxF112C-N transmission models, TCM Software 5516042 or greater may not be available. If not, contact Eaton Cummins Automated Transmission Technologies at +1-800-826-4357 for further diagnostic instructions.
    _Graphics/_LineArt/TRSM0950_MTMServProc_Table2.png

  9. Compare MTM Part Number recorded in Step 3 with MTM Part Number in table and record MTM Type.

    _Graphics/_LineArt/TRSM0950_MTMServProc_Table3.png

  10. Key on with engine off.

  11. Connect ServiceRanger.

  12. Go To “Configuration”.

  13. Select “Advanced”.

  14. From “MTM Type” New Value drop down select MTM Type recorded in Step 9.

  15. Select “Apply” and follow on-screen prompts.

  16. Key on with engine off.

  17. Connect ServiceRanger.

  18. Go To “Configuration”.

  19. Select “Identification”.

  20. In “Current MTM Serial Number” New Value field enter MTM Serial Number recorded in Step 3.

  21. Select “Apply” and follow on-screen prompts.

Clutch and Rail Calibration

To ensure proper operation, the TCM, clutch, MTM and transmission require a Clutch and Rail Calibration. Calibrations are automatically initiated when:

  • LCA is in the reset position
  • Transmission in “N” (Neutral)
  • Key on engine running
  • Vehicle air system pressure at operating range
Notice
Do not use service tool to initiate calibrations. Allow calibrations to automatically initiate.

Note: Vehicle display may indicate a flashing “CC” and “F” in gear display.

  1. Set vehicle parking brake and chock wheels.

  2. Key on with engine running.

  3. Allow vehicle air pressure to build to governor cut-off.

    Note: Clutch and Rail Calibrations automatically initiate when vehicle air pressure reaches approximately 100 psi.

  4. Ensure “N” (Neutral) is selected and engine is running. Wait approximately 2 minutes for calibrations to complete.

    Notice
    If process is interrupted, key off, wait 1 minute and go to Step 2.
    • If vehicle display indicates a solid “N: (Neutral) in gear display, calibrations are complete. Key off, go to Step 6.
    • If vehicle display continues to indicate a flashing “CC” and/or “F” in gear display or service transmission message, go to Step 5.

  5. Key off and wait 1 minute.

  6. Key on with engine off.

  7. Connect ServiceRanger.

  8. Go to “Fault Codes”.

    • If an Active transmission fault code is set, go to Endurant HD Troubleshooting Guide TRTS0950 Diagnostic Procedure.
    • If no Active transmission fault codes are set, select “Clear Eaton Faults” and follow on-screen prompts. Go to Step 9.

  9. Disconnect ServiceRanger.

  10. Key off.

  11. Inspect transmission for a PTO.

    • If not PTO-equipped, process complete.
    • If PTO-equipped, start the engine and run for 1 to 2 minutes to fill the PTO with oil, key off and repeat the Fill Oil Procedure.
    Caution
    Failure to repeat the Fill Oil service procedure to verify proper transmission oil level when equipped with a PTO may result in low transmission oil and component damage.