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NHTSA ID Number: 10202797
Manufacturer Communication Number: SSM 50238
Summary
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 4001 and applicable labor operations in Section 04 of the Service Labor Time Standards (SLTS) Manual.
2 Affected Products
Vehicle
| MAKE | MODEL | YEAR |
FORD | F-250 SD | 2021-2022 |
APPLICABLE VEHICLES
2021 TRUCK: FE P558N SUPER DUTY
2022 TRUCK: FE P558N SUPER DUTY
NHTSA ID Number: 10201598
Manufacturer Communication Number: SSM 50138
Summary
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.
1 Associated Document
Manufacturer Communications
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
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1 Associated Document
Manufacturer Communications
SSM 50238 – 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
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NHTSA ID Number: 10200999
Manufacturer Communication Number: SSM 50032
Summary
Some 2021 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.
1 Associated Document
Manufacturer Communications
SSM 50032 – 2021 F-250 – 4WD – 6R100 – 3.73 Axle Ratio – Metallic Grinding Noise Under Light Acceleration Between 23-33 MPH (37-53 Km/h) – Built On Or After 01-Feb-2021
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- Prevents shudder, gear wear, sticking, and vibration; maintains optimal frictional stability for the full duration of its life; exceptionally smooth shifting and efficient torque transfer, even under severe loads such a towing or hauling
Last update on 2025-04-20 / Affiliate links / Images from Amazon Product Advertising API
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