# Service bulletin S7643

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: 10211023
- Published by NHTSA: 2022\-05\-05
- Manufacturer's number: S7643
- Manufacturer's date: 2022\-04\-27
- NHTSA component: STEERING

## NHTSA's summary

Steering Shaft at Miter Box, Inspection

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2022/MC-10211023-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2022/MC-10211023-9999.pdf)

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

## Components

Steering

## Vehicles listed

- 2020 MACK LR

## Recalls for the same vehicles and component

- [2021248](/recalls/tc/2021248.md), 2021-04-26: Steering
- [21V293000](/recalls/nhtsa/21V293000.md), 2021-04-26: STEERING

## Other bulletins for the same vehicles and component

- [CBR 2515\-1 102025](/bulletins/11024783.md), 2025-11-03, Service bulletin: STEERING. CBR \- Hard Steering Due to Steering Column Miter Box Corrosion – Inspection and Replacement Procedure
- [S7580](/bulletins/10191634.md), 2021-05-04, Service bulletin: STEERING. V Stay Apex Housing Premature Failure

JSON: [/v1/bulletins/10211023](/v1/bulletins/10211023)

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