Mar 12, 2026  
2025 - 2026 Catalog 
    
2025 - 2026 Catalog
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DESL 2120 - Automatic and Automated Drivetrains


3.0 Credits

Students learn to analyze codes, diagnose problems, rebuild, repair, and properly maintain Allison automatic and other automated shift truck drivetrains in a professional setting.

Prerequisites: (3) DESL 1000 , DESL 1210  and DESL 2100  for Truck Option students or DESL 2110  for Heavy Equipment Option students all with a C or better

Lecture Hours: 1.0
Lab Hours: 6.0
Internship Hours: 0.0
Clinical or Practicum Hours: 0.0




Course Objectives
  1. Work safely in the shop/lab without harm to oneself or other students.
  2. Gain the skill of tool usage through the hands on use of the student’s tools and equipment/tools supplied by the college.
  3. Perform heavy duty truck automated clutch adjustment, disassembly, inspection, and assembly.
  4. Identify internal/external and integrated parts for automated clutches, transmissions, driveline and differentials.
  5. Properly diagnose component fault codes and component failures for both automated and automatic transmissions.
  6. Explain the function and theory of automated clutches, transmissions, drivelines, driveaxles and differentials.
  7. Gain technical skills by disassembling, inspecting, and assembling automatic transmissions, driveline and driveaxles.
  8. Properly diagnose component failures by performing 3 and 7 above.
  9. Use industry specialty tools in 3 and 7 above.
  10. Diagnose electrical and electronic failures or fault codes in direct drive automated transmissions.
  11. Properly use EST’s to diagnose and analyze electronic and mechanical failures for 10 above.
  12. List and master use of proper terminology for automated clutches/transmissions. 
  13. List and master use of proper terminology for electronic and hydro mechanical automatic transmissions


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