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NHTSA ID Number: 10201637
Manufacturer Communication Number: TSB 21-2330
Summary
Some 2020 Mustang GT350 – 2020-2021 Mustang Mach 1/Shelby GT500 vehicles may exhibit a rear differential fluid leak at the differential cooler line fittings. This may be due to a seal within the fittings. To correct the condition, follow the service procedure to replace both rear differential cooler line fittings.
Model:
2020-2021 Mustang Mach 1
2020 Mustang Shelby GT350
2020-2021 Mustang Shelby GT500
Issue: Some 2020 Mustang Shelby GT350, 2020-2021 Mustang Mach 1/Shelby GT500 vehicles may exhibit a rear differential fluid leak at the differential cooler line fittings. This may be due to a seal within the fittings. To correct the condition, follow the service procedure to replace both rear differential cooler line fittings.
Action: Follow the Service Procedure steps to correct the condition on vehicles that meet the following criteria:
- One of the following vehicles:
- 2020 Mustang Shelby GT350
- 2020-2021 Mustang Mach 1
- 2020-2021 Mustang Shelby GT500
- Rear differential fluid Leak at the cooler line fittings located on the rear axle assembly
NOTE: Part quantity refers to the number of that service part number required, which may be different than the number of individual pieces. Service part numbers contain 1 piece unless otherwise stated. “As Needed” indicates the part is required but the number may vary or is not a whole number; parts can be billed out as non-whole numbers, including less than 1.
Parts
Service Part Number | Quantity | Description | |
MR3Z-6K741-A | 2 | Oil Cooler Adapter | Package Contains 1 Piece, 2 Pieces Required |
XY-75W85-QL | As Needed | Motorcraft® SAE 75W-85 Premium Synthetic Hypoid Gear Lubricant | – |
XL-3 | As Needed | Motorcraft® Additive Friction Modifier | – |
Service Procedure
1. Disconnect the cooler lines from the rear axle housing. Refer to Workshop Manual (WSM), Section 205-02 Rear Drive Axle/Differential > Removal and Installation > Axle Assembly > Removal Steps 8-9. The differential fluid will drain out of the axle assembly during this step.
2. Remove and discard both fittings from the axle housing.
3. Install the new fittings. Tighten both fittings to 23 Nm (17 lb-ft).
4. Reinstall the cooler lines. Refer to WSM, Section 205-02 Rear Drive Axle/Differential > Removal and Installation > Axle Assembly > Installation Steps 4-6.
5. Refill the axle to the proper fill level. Refer to WSM Section 205-02 Rear Drive Axle/Differential > General Procedures > Differential Fluid Level Check.
2 Affected Products
Vehicle
MAKE | MODEL | YEAR |
FORD | MUSTANG | 2020-2021 |
1 Associated Document
Manufacturer Communications
21-2330
23 September 2021
https://www.nhtsa.gov/recalls?nhtsaId=10201637
- Compatible with/in many late model BMW, Dodge, Ford, GM, Jeep, Lexus, Mercedes-Benz, Ram, Toyota
- Applications include differential oil, final drive oil, gear oil and transfer case fluid
- Contains additional friction modifiers for suitability with clutch-type limited slip differentials - for most LSDs, no additional friction modifiers are required
- This product is not designed for use in most manual transmissions or transaxles with synchronizers, as extreme slipperiness may cause shifting problems
- Known formerly as LightWeight Gear Oil
- Two quarts of SAE 75W-85 Synthetic Axle Lubricant.
- Item Package Dimension: 10.39L x 4.45W x 2.72H inches
- Item Package Weight - 1.96 Pounds
- Item Package Quantity - 1
- Product Type - MACHINE LUBRICANT
- Motorcraft Rear Axle Oil - XY75W85QL
- Works in tight spaces and makes gear oil easier to use
- Full Synthetic formula for exceptional high and low temperature protection
- Contains an extreme pressure additive for better load carrying capacity and wear protection
- Excellent thermal stability designed to protect oil from high temperature breakdown
- Mobil 1 Synthetic Gear Lube LS is a supreme performance, synthetic, multipurpose, automotive gear lubricant
- Meet or exceed the highest level of performance requirements of many modern passenger vehicles – including limited slip applications
- Helps protect against thermal and oxidative degradation, wear and corrosion, and viscosity loss associated with premature shearing
- Promotes outstanding power transfer performance - even in some of the most severe driving conditions
- Sold as 6 pack
- genuine oem factory part
- exact fit
- durable
- best in quality
- this is not an aftermarket part
- Full synthetic formulation with no compromises; Equal or better performance than OEM fluids; Wide Compatibility Range Across Many European, Asian and Us OEMs
- Exceptionally smooth gear operation and frictional stability and gear functionality; Designed to prevent shudder, sticking, and slipping
- Protects brass, copper, and aluminum alloys; Excellent wear protection even in severe service conditions; Excellent gear protection in high horsepower / high speed conditions and sustained mechanical / thermal loads; High Load Capacity for Excellent Off-Road Performance and Significant Wear Reduction
- Excellent Heat Transfer and Low Operational Temperature; Excellent Cold Temperature Performance Down to -50°F; LIFETIME FILL Once Changed Unless OEM Recommends Drain Interval
- superior oxidation resistance
- promotes a longer seal life
- for use: rear axle 2014 silverado and sierra
- quantity: 1 quart
- Fit type: Vehicle Specific
- Specially recommended for ZF limited slip differentials with carbon linings
- High quality full synthetic SAE 75W-85 final drive lubricant
- High viscosity lubricant to better protect axle’s moving components
- Fit Type: Vehicle Specific
- Package Dimensions: 31.75 H x 15.24 L x 15.24 W (centimeters)
- Country of Origin : United States
- Package Weight: 3.447 kilograms
Last update on 2024-04-09 / Affiliate links / Images from Amazon Product Advertising API
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Warranty Status: Eligible under provisions of New Vehicle Limited Warranty (NVLW)/Service Part Warranty (SPW)/Special Service Part (SSP)/Extended Service Plan (ESP) coverage. Limits/policies/prior approvals are not altered by a TSB. NVLW/SPW/SSP/ESP coverage limits are determined by the identified causal part and verified using the OASIS part coverage tool. Labor Times Description Operation No. Time 2020 Mustang Shelby GT350, 2020-2021 Mustang Mach 1/Shelby GT500: Inspect And Replace The Cooler Line Fittings On The Rear Axle Includes Time To Check And Adjust Differential Fluid (Do Not Use With Any Other Labor Operations) 212330A 0.6 Hrs. Repair/Claim Coding Causal Part: 6K741 Condition Code: D8
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