Power train: automatic transmission (Allison)
Vehicle equipment recall 18E-085. NHTSA received Allison Transmission, Inc.’s report on Aug 20, 2018.
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The short answer
NHTSA received Allison Transmission, Inc.’s report on Aug 20, 2018. 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?
A loss of drive can disable the vehicle unexpectedly, increasing the risk of a crash.
Allison Transmission, Inc.
(Allison) is recalling certain H 50 EP, H 40 EP, H 50 Cert, and H 40 Cert Drive Units.
The pressure switches on these Drive Units may fail, possibly resulting in a loss of drive.
NHTSA, Recalls flat file. Released Oct 20, 2026. Updated daily.
- NHTSA’s part: Power train: automatic transmission.
What should you do?
Allison will notify the vehicle manufacturers that purchased the affected transmissions, and dealers will replace the C1 and C2 pressure switches, free of charge. The recall began September 14, 2018. Owners may contact Allison customer service at 1-800-252-5283.
NHTSA, Recalls flat file. Released Oct 20, 2026. Updated daily.
- How to reach the firm: Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.
Which ones are recalled?
NHTSA counts 592 items potentially involved, across everything this recall names.
NHTSA, Recalls flat file. Released Oct 20, 2026. Updated daily.
- Allison H 50 EP TransmissionBuilt from Jan 4, 2017 to Jun 4, 2018
- Allison H 40 EP TransmissionBuilt from Jan 4, 2017 to Jun 4, 2018
Who is recalling it?
- Made by Allison Transmission, Inc..
NHTSA, Recalls flat file. 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 (FLAT_RCL_POST_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.