Power train: automatic transmission (Allison DIV)
Vehicle equipment recall 80E-006. NHTSA received ALLISON DIV., GM CORP.’s report on Mar 25, 1980.
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The short answer
NHTSA received ALLISON DIV., GM CORP.’s report on Mar 25, 1980. Copied from NHTSA on Oct 20, 2026.
Every line below is in NHTSA’s own words, with its source beside it.
What’s wrong with it?
The notice gives no hazard in a field of its own.
CERTAIN TRANSMISSIONS WERE ASSEMBLED WITH IMPROPERLY MACHINED FORWARD CLUTCH HOUSINGS.
THE RESULTING INCORRECT BALL CHECK VALVE SEAT ANGLES IN THE PRESSURE EXHAUST PORTS MAY PREVENT COMPLETE OIL EVACUATION FROM THE PISTON APPLY AREA.
NHTSA, Recalls flat file before 2010. Released Oct 20, 2026. Updated daily.
- NHTSA’s part: Power train: automatic transmission.
What should you do?
VEHICLES WILL BE INSPECTED AND, IF NECESSARY, THE FORWARD CLUTCH ASSEMBLIES WILL BE REWORKED.
NHTSA, Recalls flat file before 2010. Released Oct 20, 2026. Updated daily.
- How to reach the firm: VEHICLE CATEGORY: TRUCKS AND BUSES WITH DIESEL TRANSMISSIONS.SYSTEM: POWER TRAIN; ALLISON TRANSMISSIONS, MODEL NOS. HT-700, CLBT-750 ANDV-730.CONSEQUENCES OF DEFECT: TRUCKS AND BUSES WITH THESE TRANSMISSIONS MAY MOVEFORWARD EVEN WHEN THE GEAR SELECTOR IS IN NEUTRAL. THIS COULD OCCUR WITHOUTPRIOR WARNING AND COULD RESULT IN AN ACCIDENT.
Which ones are recalled?
NHTSA counts 364 items potentially involved, across everything this recall names.
NHTSA, Recalls flat file before 2010. Released Oct 20, 2026. Updated daily.
- Allison DIV Allison DIVBuilt from Jan 1, 1979 to Apr 1, 1979
Who is recalling it?
- Made by ALLISON DIV., GM CORP..
NHTSA, Recalls flat file before 2010. Released Oct 20, 2026. Updated daily.
What the record doesn’t say
- NHTSA’s recall file doesn’t say whether anyone was hurt.
- Which ones, by part or lot: the recall’s report on NHTSA’s site gives them where the maker did; this file gives part numbers only where its maker listed them.
- How many have been returned or fixed isn’t in the notice.
Hearth Record wrote these lines.
Sources
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National Highway Traffic Safety Administration, Recalls flat file before 2010 (FLAT_RCL_PRE_2010).
Released Oct 20, 2026 and checked Oct 20, 2026. Updated daily. Public domain (U.S. Government work).
Vehicle, car seat, tire and vehicle equipment recalls, owner complaints and crash ratings are from the National Highway Traffic Safety Administration (NHTSA). Copied on Oct 20, 2026.