SSM 50138

Service Bulletin Details

Public Details for: SSM 50138

Some 2021-2022 f-250 vehicles equipped with a 6r100 transmission, four-wheel drive (4wd), 3.73 rear axle ratio, and built on or after 01-feb-2021 may exhibit a metallic grinding noise from the rear of the vehicle under light acceleration be


- 2022 - 2021 -

Models from 2022
2022 FORD F-250 SD
Models from 2021
2021 FORD F-250 SD 
SSM 50138 - 2021-2022 F-250 - 4WD - 6R100 - 3.73 Axle - Metallic Grinding
Noise Under Light Acceleration Between 23-33 MPH (37-53 Km/h) - Built On
Or After 01-Feb-2021
Some 2021-2022 F-250 vehicles equipped with a 6R100 transmission, four-wheel drive (4WD), 3.73
rear axle ratio, and built on or after 01-Feb-2021 may exhibit a metallic grinding noise from the rear
of the vehicle under light acceleration between 23-33 mph (37-53 Km/h). The noise is most prevalent
in 3rd and 4th gear when the vehicle is warm. This may be due to normal driveline noise transmitting
through the driveshaft. To correct the condition, replace the rear axle drive pinion flange using
service part number HC3Z-4851-A. Also, replace the rear pinion seal. Refer to Workshop Manual
(WSM), Section 205-02. For claiming, use causal part 4851 and applicable labor operations in
Section 04 of the Service Labor Time Standards (SLTS) Manual.
APPLICABLE VEHICLES
2021 TRUCK: FE P558N SUPER DUTY
2022 TRUCK: FE P558N SUPER DUTY

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