Vehicle report
Technical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.
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This applies to some GILLIG Allison eGen Flex Hybrids built between the years 2021 and 2024 using a speedometer that does not correctly accumulate odometer mileage when the vehicle is driving in electric only mode (engine not running).
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Gillig Hybrid Electric vehicles that utilize "Depot" mode or Geofencing are not accumulating electric only odometer mileage. Some Gillig Hybrid electric vehicles were built using a speedometer that does not correctly accumulate odometer mileage when the vehicle is driving in electric only mode (engine not running).
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Allison Transmission equipped buses were built without a pressure regulator at the Solenoid inlet to the transmission retarder accumulator air inlet. This bulletin provides retrofit instructions for installing a pressure regulator to remedy leaks at the solenoid air exhaust.
Complaint counts are reports filed with NHTSA, not failure rates. A common model collects more of them than a rare one that breaks more often.