# Service bulletin 511679

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: 10242581
- Published by NHTSA: 2023\-10\-02
- Manufacturer's number: 511679
- Manufacturer's date: 2023\-09\-21
- NHTSA component: POWER TRAIN

## NHTSA's summary

According to FCA Campaign 71A: "The transmission in your vehicle may experience an internal dislodging of a snap ring which can cause poor shift quality and not engage the lower gears. The Malfunction Indicator Lamp \(MIL\) may also illuminate on the instrument panel cluster."

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10242581-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10242581-9999.pdf)

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

## Components

Transmission and driveline

## Vehicles listed

- 2023 DYNAMAX ISATA
- 2023 FOREST RIVER ROCKPORT

## Other bulletins for the same vehicles and component

- [511762](/bulletins/11000465.md), 2024-05-28, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN. The routing of the main wiring harness might contact the drive shaft and chafe, which could result in a short circuit, loss of drive power, power steering, and brake control system. A short circuit increases the risk of a fire, and a loss of drive power, power steering, and brake system control increases the risk of a crash. This is in reference to Mercedes\-Benz Recall Campaign 24V166.
- [511702FRI\-INT](/bulletins/10245382.md), 2023-12-01, Service bulletin: POWER TRAIN; PARKING BRAKE. According to Ford Recall 23V625: "In your vehicleâ™s transmission, a casting defect in the transmission upper valve body casting may cause the main control poppet valve to get stuck in the open position. A stuck poppet valve restricts the flow of lubricant to the rear extension housing bushing, resulting in excessive heat generation in the bushing and erosion of the rear seal. This condition leads to transmission fluid leakage, noise, and vibration. The increased vibration may result in a loss of torque retention on the abutment plate bolts. Once the abutment plate bolt torque is compromised, the park actuator may be unable to engage the park pawl into the park gear, which may result in unintended vehicle movement if the parking brake is not applied, increasing the risk of a crash."

JSON: [/v1/bulletins/10242581](/v1/bulletins/10242581)

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