2020 RAM Promaster power train problems
10 owner complaints filed with NHTSA name the power train on the 2020 RAM Promaster — 25% of all complaints for this model year.
What owners report
“The contact owns a 2020 Ram Promaster 1500. The contact stated that while his wife was driving at an undisclosed speed, the vehicle jerked, and the transmission downshifted unexpectedly. The check engine warning light illuminated. In addition, while shifted in reverse(R), the vehicle failed to…”
filed Feb 5, 2026
“formal complaint for gross negligence, warranty breach, and repeated mechanical failures involving my RAM 2020 ProMaster 1500 HR (VIN: [XXX] ). The vehicle remained out of service for 1 year, 4 months, and 18 days due to transmission damage. Five days after the final delivery, the transmission…”
filed Dec 5, 2025
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related recalls
- Park pawl may not fully engage the park gear due to debris inside the transmissionCampaign 23V301000 · Apr 27, 2023
Power Train problems in other Promaster years
| Year | Reports | Share |
|---|---|---|
| 2023 Promaster | 4 | 5% |
| 2021 Promaster | 12 | 11% |
| 2019 Promaster | 23 | 41% |
| 2018 Promaster | 7 | 19% |
| 2017 Promaster | 14 | 25% |
| 2016 Promaster | 8 | 26% |
| 2015 Promaster | 12 | 20% |
| 2014 Promaster | 14 | 20% |
Other reported problem areas on the 2020 RAM Promaster
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.