MTM Rail B, C and D Cylinder Inspection Procedure
Special Instructions
Perform this entire procedure only if guided here by Endurant HD Troubleshooting Guide TRTS0950: Fault Code 617, 740, 760 and/or 775
- and
- MTM Serial Number is less than 12S22342093445
- and
- MTM Part Number is A-10000715 or A-10002594
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.
Special Tools
None
Note: MTM removal and installation requires the transmission to be removed from the vehicle. Reference Endurant HD Service Manual TRSM0950, Transmission Removal Service Procedure.
Component Identification
MTM, Fore view  | MTM, Aft view  |
1. MTM Rail B 2. MTM Rail D 3. MTM Rail C | |
 | |
1. Part Number 2. Serial Number |
Procedure - Inspection
Place MTM on a clean surface.
Visually inspect Rail B Cylinder covers (fore and aft) for loose cap screws, loose covers and/or protruding O-rings.
- If no loose cap screws, covers, or protruding O-rings are found, go to Step 3.
- If a loose cap screw, cover and/or protruding O-ring is found, go to Endurant HD Service Manual TRSM0950 MTM Rail B, C and D Cylinder.
Rail B Cylinder Cover Fore
Rail B Cylinder Cover Aft
Visually inspect Rail C Cylinder covers (fore and aft) for loose cap screws, loose covers and/or protruding O-rings.
- If no loose cap screws, covers, or protruding O-rings are found, go to Step 4.
- If a loose cap screw, cover and/or protruding O-ring is found, go to Endurant HD Service Manual TRSM0950 MTM Rail B, C and D Cylinder.
Rail C Cylinder Cover Fore
Rail C Cylinder Cover Aft
Visually inspect 3rd Rail C Cylinder cover Aft cap screw (not accessible).
- If cap screw is visually tight, go to Step 5.
- If cap screw is visually loose, go to Endurant HD Service Manual TRSM0950 MTM Rail B, C and D Cylinder.
Visually inspect Rail D Cylinder covers (fore and aft) for loose cap screws, loose covers and/or protruding O-rings.
- If no loose cap screws, covers, or protruding O-rings are found, go to Step 6.
- If a loose cap screw, cover and/or protruding O-ring is found, go to Endurant HD Service Manual TRSM0950 MTM Rail B, C and D Cylinder.
Rail D Cylinder Cover Fore
Rail D Cylinder Cover Aft
Determine next step:
- If guided here by Endurant HD Troubleshooting Guide TRTS0950: Fault Code 617 and no protruding O-rings or loose cover cap screws are found, go (return) to Endurant HD Troubleshooting Guide TRTS0950: Fault Code 617 Step H.
- If guided here by Endurant HD Troubleshooting Guide TRTS0950: Fault Code 740 and no protruding O-rings or loose cover cap screws are found, go (return) to Endurant HD Troubleshooting Guide TRTS0950: Fault Code 740 Step C.
- If guided here by Endurant HD Troubleshooting Guide TRTS0950: Fault Code 760 and no protruding O-rings or loose cover cap screws are found, go (return) to Endurant HD Troubleshooting Guide TRTS0950: Fault Code 760 Step C.
- If guided here by Endurant HD Troubleshooting Guide TRTS0950: Fault Code 775 and no protruding O-rings or loose cover cap screws are found, go (return) to Endurant HD Troubleshooting Guide TRTS0950: Fault Code 775 Step C.
Example of a loose Rail (C) Cylinder Cover with a protruding O-ring.
Example of a loose Rail (B) Cylinder Cover with a protruding O-ring.
 Cylinder Cover Oring.png "_Graphics/_Raster/TRSM0950_MTM Inspect_Rail (B) Cylinder Cover Oring.png")
Example of a loose Rail (C) Cylinder Cover cap screw.
 Cylinder Loose Cover.png "_Graphics/_Raster/TRSM0950_MTM Inspect_Rail (C) Cylinder Loose Cover.png")
Warranty Information
Reference the relevant warranty information provided in service bulletin TAIB-0994