Which transmission is referenced in relation to fluid level codes and the shift console procedure?

• A. ZF transmission
• B. Mercedes transmission
• C. Eaton transmission
• D. Allison transmission

Answer: (D)

Fluid level codes and the shift console procedure are tied to how a specific transmission communicates status and is checked during maintenance. Allison transmissions use an integrated shift console that not only selects gears but also displays fluid level status through coded indicators. This built-in, console-based coding system is distinctive to Allison, so when a question mentions fluid level codes together with a shift console procedure, it points to the Allison design. Other brands—ZF, Mercedes, Eaton—use different dipstick locations, indicators, or procedures that aren’t described as a shift-console coding system in the same way, so the reference wouldn’t fit them.