# Service bulletin K53821422

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: 10134785
- Published by NHTSA: 2018\-04\-23
- Manufacturer's number: K53821422
- Manufacturer's date: 2018\-03\-16
- NHTSA component: POWER TRAIN:MANUAL TRANSMISSION

## NHTSA's summary

Mack Chassis \- Equipped With An Automated Manual Transmission Model F \( AMT\-F, mDrive \) \- Road Speed Parameter Discrepancies \( P1ALV \) Following Software Update; Road Speed Limit Incorrect \- OBD16 And Newer Chassis

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2018/MC-10134785-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2018/MC-10134785-0001.pdf)

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

## Components

Transmission and driveline, Manual transmission

## Vehicles listed

- MACK CHU
- MACK CXU
- MACK GU

JSON: [/v1/bulletins/10134785](/v1/bulletins/10134785)

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