Ford 2021-2022 Bronco | Transmission/Transaxle: MT88 |
Issue:
Some 2021-2022 Bronco vehicles equipped with a MT88 manual transmission may experience a rotational scraping noise in ambient temps below 10°C (50°F) and after a cold soak with the transmission in neutral, 1st, and/or 2nd gear and clutch engaged. The noise may go away as the transmission warms up. This may be due to the 5th and 6th gear synchronizer rings. To correct the condition, follow the Service Procedure to replace the 5th and 6th gear synchronizer rings.
Action:
Follow the Service Procedure to correct the condition if the vehicle meets the following criteria:
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2021-2022 Bronco
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Equipped with MT88 manual transmission
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Rotational scraping noise from the transmission in ambient temps below 10°C (50°F) and after a cold soak with the transmission in neutral, 1st, and/or 2nd gear and clutch engaged
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Noise goes away as the transmission warms up
| Service Part Number | Claim Quantity | Package Order Quantity | Number in Package | Description | | W520103-S442W520103-S442 | 2 | 1 | 4 | Exhaust Flange Nuts | | MB3Z-9450-BMB3Z-9450-B | 1 | 1 | 1 | Exhaust Flange Gasket | | W713314-S439W713314-S439 | 2 | 1 | 4 | Hanger Bracket Bolts | | W500121-S439W500121-S439 | 9 | 3 | 4 | Transfer Case To Transmission Bolts | | LB3Z-4B496-ALB3Z-4B496-A | 8 | 8 | 1 | Driveshaft Bolts And Retaining Straps | | W710624-S300W710624-S300 | 1 | 1 | 4 | Crawler/Reverse Gear Synchronizer Roll Pin | | MU7Z-7W441-AMU7Z-7W441-A | 1 | 1 | 1 | Gate Pin | | MU7Z-7107-CMU7Z-7107-C | 2 | 2 | 1 | 5th And 6th Gear Synchronizer Rings | | BR3Z-7064-ABR3Z-7064-A | 1 | 1 | 1 | Input Shaft Circlip | | MU7Z-7048-AMU7Z-7048-A | 1 | 1 | 1 | Input Shaft Seal | | MU7Z-7P497-AMU7Z-7P497-A | 1 | 1 | 1 | Counter Shaft Bore Plug | | BR3Z-7052-ABR3Z-7052-A | 1 | 1 | 1 | Output Shaft Seal | | MU7Z-3K050-AMU7Z-3K050-A | 2 | 2 | 1 | Circlip | | MU7Z-3K050-BMU7Z-3K050-B | 1 | 1 | 1 | Circlip | | MU7Z-3K050-CMU7Z-3K050-C | 1 | 1 | 1 | Circlip | | TA-357TA-357 | | As Needed | | Motorcraft® High Performance Engine RTV Silicone | | XT-11-QDCXT-11-QDC | | As Needed | | Motorcraft® Dual Clutch Transmission Fluid | | ZC-30-AZC-30-A | | As Needed | | Motorcraft® Silicone Gasket Remover | | ZC-31-BZC-31-B | | As Needed | | Motorcraft® Metal Surface Prep Wipes | | ZC-20ZC-20 | | As Needed | | Motorcraft® Engine
Shampoo and Degreaser (All Markets Except Canada) | | CXC-66-ACXC-66-A | | As Needed | | Motorcraft® Engine Shampoo (Canada Only) | | PM-4-APM-4-A | | As Needed | | Motorcraft® Metal Brake Parts Cleaner (Compliant With Low Volatile Organic Compound Requirements As Required In Some USA States) | | PM-4-BPM-4-B | | As Needed | | Motorcraft® Metal Brake Parts Cleaner (Not Compliant With Volatile Organic Compound Requirements) | | PM-20PM-20 | | As Needed | | Motorcraft® DOT 4 LV High Performance Motor Vehicle Brake Fluid | | Obtain LocallyObtain Locally | | As Needed | | Plastic Scraper / Plastic Razer Blades | | Obtain LocallyObtain Locally | | As Needed | | Nylon Bristle Brush | | Obtain LocallyObtain Locally | | As Needed | | Lint Free Towel | | Obtain LocallyObtain Locally | | As Needed | | Isopropyl Alcohol (Minimum 90%) | | Obtain LocallyObtain Locally | | As Needed | | Large Zip Ties |
Quantity refers to the amount of the service part number required to repair the vehicle. Unit of Issue refers to the number of individual pieces included in a service part number package. Piece Quantity refers to the total number of individual pieces required to repair the vehicle. As Needed indicates the amount of the part may vary and/or is not a whole number. Parts can be billed out as non-whole numbers, including less than 1. Warranty Status: Eligible under provisions of New Vehicle Limited Warranty (NVLW)/Service Part Warranty (SPW)/Service Part New Vehicle (SPNV)/Extended Service Plan (ESP) coverage. Limits/policies/prior approvals are not altered by a TSB. NVLW/SPW/SPNV/ESP coverage limits are determined by the identified causal part and verified using the OASIS part coverage tool. | Description | Operation No. | Time | | 2021-2022 Bronco Manual Transmission: Replace The 5th And 6th Gear Synchronizer Rings, Includes Time To Remove And Install The Transmission (Do Not Use With Any Other Labor Operations) | 222371A | 10.1 Hrs. |
| Causal Part: | 7107 | | Condition Code: | 42 |
1. Remove the transmission from the vehicle, Refer to Workshop Manual (WSM), Section 308-03.
2. Disassemble the sub-assemblies to access the 5th and 6th gear synchronizer rings. Refer to WSM, Section 308-03.
3. Replace the 5th and 6th gear synchronizer rings.
4. Assemble the transmission per WSM, Section 308-03.
(1). The reverse/crawl gear synchronizer assembly must be assembled on the transmission. Refer to Figures 1-2 for an exploded view of the reverse/crawl gear synchronizer assembly.
Figure 1
Figure 2
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