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
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
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
- Widely compatible with a huge range of vehicles and specifications including: Dexron ULV, Mercon ULV, Nissan Matic P, JATCO 9 Speed, BMW 83-22-2-413-477 ATF 7 and many other ULV applications.
- EXTENDED DRAIN: Long drain intervals of up to 150,000 miles for standard driving and 70,000 miles for heavy-duty applications
- COLD WEATHER READY: Engineered for extreme conditions with a pour point down to -50°F, ensuring top fuel economy and performance in freezing temperatures
- OEM REPLACEMENT: 100% synthetic ATF Compatible with Mercon ULV, Dexron ULV, WSS-M2C949-A or MB 2236.17, and other ULV applications in European and US cars, trucks, and SUVs
- ADVANCED COMPATIBILITY: Compatible with GM 10L80/10L90, Escalade (2021+ with 10L80), CT6 3.0TT and 4.2TT (2019+ with 10L80), Silverado 1500 (2019+ with 10L80), Camaro SS / ZL1 (2017+ with 10L80/90), Tahoe and Suburban (2021+ with 10-speed), Sierra 1500 (2019+ with 10L80), and Yukon and Yukon XL with 10 speed transmissions
Last update on 2026-05-31 / Affiliate links / Images from Amazon Product Advertising API
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