# Service bulletin TSB 23\-2019

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10237783
- Published by NHTSA: 2023\-06\-13
- Manufacturer's number: TSB 23\-2019
- Manufacturer's date: 2023\-06\-09
- NHTSA component: POWER TRAIN; POWER TRAIN:MANUAL TRANSMISSION:INTERNAL:GEARS

## NHTSA's summary

Some 2021\-2023 Bronco vehicles equipped with a MT88 manual transmission may experience a rotational scraping noise while the transmission is in neutral, 1st or 2nd gear with the clutch pedal released and may be more noticeable in ambient temps below 10°C \(50°F\) and after a cold soak. This noise may diminish 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.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10237783-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10237783-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Transmission and driveline, Manual transmission

## Vehicles listed

- 2021 to 2023 FORD BRONCO

## Other bulletins for the same vehicles and component

- [SSM 49928](/bulletins/10199500.md), 2021-08-02, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN:MANUAL TRANSMISSION:INTERNAL:DOGS/SYNCHROS. Some 2021 Mustang Mach\-E, F\-150, Edge/Nautilus or Bronco vehicles equipped with SYNC 4 may have a customer symptom of the SYNC voice commands being activated without pushing the steering wheel switch. This may be due to the feature called Wake Word within SYNC 4. This feature allows the driver to activate the SYNC 4 system without pushing the steering wheel switch. Under the touchscreen Settings \> Voice Settings the preferred Wake Word can be changed. The feature can also be disabled if the customer does not want the SYNC voice commands being activated without touching the steering wheel switch. This feature is not a defect. Do not submit a claim for this condition.

JSON: [/v1/bulletins/10237783](/v1/bulletins/10237783)

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