Skip to content
Transmission and drivetrainPart report

2020 Ram Promaster Transmission and drivetrain Problems

Complaints
10about this part
Share
24%of 42 total for the year
Median mileage
69,580miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 10 complaints about the transmission and drivetrain of the 2020 Ram Promaster, 24% of the 42 complaints for this model year. Where a mileage was given, the median is 69,580 miles. 1 recall campaign on record is filed under a similar system.

Fewer than 15 complaints name this part, so treat the figures as a rough indication only.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“The transaxle downshifts whenever the accelerator pedal is released and the vehicle gains speed. This happens anytime, not when the driver wants to slow down. In the snow this has caused me to loose traction (unwanted engine breaking). There is no way to turn this off. I've spoken with other ProMaster owners and they all report the same issue. The transaxle should only offer engine breaking if the driver is depressing the brake pedal. Not whenever the vehicle accelerates. I believe this feature should only be active in tow/haul mode, and not be active in Drive mode. …”

NHTSA complaint #11529507, filed 2023-06

“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 function as intended. The vehicle was taken to the dealer, where it was diagnosed with transmission failure. The contact was informed that parts were not available to repair the vehicle. The vehicle remained at the dealer for over a year and a half. The vehicle was repaired. …”

NHTSA complaint #11716001, filed 2026-02, 69,580 miles

“The contact owns a 2020 Ram Promaster 1500. The contact received notification of NHTSA Campaign Number: 23V301000 (POWER TRAIN). However, the dealer refused to replace the transmission. The dealer informed the contact that replacing the transmission was not included in the remedy. The contact stated that the failure of the transmission caused the front pump to not function as intended. The contact stated that on a separate occasion, the transmission failed to function as intended. The contact attempted to shift the gear lever; however, the transmission failed to engage as intended. …”

NHTSA complaint #11693605, filed 2025-10, 95,000 miles

“The contact owns a 2020 Ram 1500 Promaster. The contact stated that while driving at various speeds, the transmission unexpectedly downshifted. No warning lights were illuminated. The vehicle then returned to normal functionality. The local dealer was not contacted. The contact attempted a hard reset on the vehicle. The contact removed the battery cable, waited for several minutes, and then reinstated the battery cables. The contact stated that the failure persisted. Upon investigation, the contact discovered that the previous owner had received NHTSA Campaign Number: 23V301000 (POWER TRAIN). …”

NHTSA complaint #11673408, filed 2025-07, 64,315 miles

“Transmission failure: Debris that caused the need for the 44A recall clogged the internal pump causing seizure. RAM service stated the need for transmission replacement, my cost.”

NHTSA complaint #11653161, filed 2025-04

Related recalls

Related service bulletins

Transmission and drivetrain: other model years

YearComplaintsShare of year
202344%
202223%
20211312%
20201024%
20192440%
2018718%
20171425%
2016824%
20151220%
20141420%

Other parts of the 2020 Ram Promaster

Back-over prevention (rear camera)
11 complaints
Other or unknown
9 complaints
Electrical system
8 complaints
Engine cooling
5 complaints
Engine
4 complaints
Visibility (wipers, defrost, mirrors)
4 complaints
Steering
3 complaints
Seat belts
2 complaints
Air bags
1 complaints
Brakes
1 complaints
Lane departure
1 complaints
Seats
1 complaints

← All problems reported for the 2020 Ram Promaster

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 29, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology