Skip to content
Transmission and drivetrainPart report

2021 Freightliner M2 Transmission and drivetrain Problems

Complaints
2about this part
Share
25%of 8 total for the year
Median mileage
—not reported
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 2 complaints about the transmission and drivetrain of the 2021 Freightliner M2, 25% of the 8 complaints for this model year.

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.

“We have had close to 30 failures of the Meritor Transfer Case in both International and Freightliner chassis. This case specifically and of which I will add photos, is a 2021 Freightliner. The internal coating is flaking off and clogging the oil pump pick up screen which in turn starves the pump and eventually leads to bearing failure. This is a safety concern because the T-Case is the central connecting point for the drive line. …”

NHTSA complaint #11506369, filed 2023-02

“Meritor Transfer case has failed due to the internal coating coming off and clogging the oil pump pick up tube screen which starves the oil pump and eventually leads to bearing failure. This is a safety concern because the T-Case is the central connecting point for the drive line. When the bearings fail or seize the torque from the input shaft can cause the connecting components (u-joints, drive shafts) to shake violently and potentially fail, leaving debris in the roadway for other motorists to deal with and also having the potential to damage the trucks brake air system. …”

NHTSA complaint #11507018, filed 2023-02

Related service bulletins

Transmission and drivetrain: other model years

YearComplaintsShare of year
2021225%

Other parts of the 2021 Freightliner M2

Electrical system
3 complaints
Engine
2 complaints
Other or unknown
1 complaints
Tires
1 complaints
Vehicle speed control
1 complaints

← All problems reported for the 2021 Freightliner M2

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 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