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Allison 3000/4000 Series Road Test Checklist

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Allison 3000/4000 Series Road Test Checklist

DT#12921

Drivability - Verifying Proper Transmission & Support Equipment Install & Operation

  • Approved fluid to be filled to appropriate level

Starting the Vehicle to Confirm Proper Response During Start Up:

  • Turn the master/ignition switch on – do not start vehicle
  • Confirm “CHECK TRANS” light comes on
  • Start the vehicle
  • Confirm “CHECK TRANS” light shuts off
  • Confirm “N” is displayed in the shift selector

Trouble Codes - Prior to Vehicle Run

  • Identify false codes that may have been stored in the electronic controls’ ECU
  • Clear these codes by performing a re-learn (see Drive-Trainer.com’s Flush and Flash video)

Road Test Vehicle - Allow Electronic Control to Converge Shifts

  • Confirm vehicle only starts in Neutral
  • Confirm CHECK TRANS light is functioning properly
  • Confirm shift selector display is functioning properly
  • Confirm proper function of transmission fluid pressure gauge (if applicable)
  • Confirm speedometer is functioning properly
  • Confirm temperature gauge is functioning properly (if applicable)
  • Confirm reverse warning system is functioning properly (if applicable)
  • Confirm transmission fluid level meets specifications (cold, neutral, level)
  • Confirm transmission fluid is not leaking
  • Confirm correct no-load governed speed of engine
  • Adjust governor as needed (refer to mfg’s specs for engine-transmission)
  • Confirm proper function of PTO (if applicable) – refer to PTO’s owner manual
  • Confirm smoothness of transmission upshifts and downshifts through all ranges
  • Perform stall test
  • Confirm quality of shift

Proper Operation

  • Confirm all components have proper mounting and operation
  • Confirm there are no transmission fluid leaks at:
    • Gaskets
    • Surfaces
    • Lines
    • Hoses

Trouble Codes - After Vehicle Run

  • Review electronic control’s ECU for existing fault codes after the road test
  • Troubleshoot and correct any problems found

Service & Maintenance

  • For detailed service & maintenance instructions refer to the current issue of Allison’s service manual
  • For detailed electronic control system troubleshooting for to the current issue of Alison’s WTEC III