# Service bulletin S7669

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: 10228635
- Published by NHTSA: 2023\-01\-04
- Manufacturer's number: S7669
- Manufacturer's date: 2022\-12\-15
- NHTSA component: POWER TRAIN

## NHTSA's summary

MMD Fan Hub Bolt Torque

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2022/MC-10228635-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2022/MC-10228635-9999.pdf)

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

## Components

Transmission and driveline

## Vehicles listed

- 2023 MACK MD

## Other bulletins for the same vehicles and component

- [CBR 2573\-1 202604](/bulletins/11032092.md), 2026-05-05, Service bulletin: POWER TRAIN. CBR \- Mack Chassis \- Through Shaft Bearing Retainer Breakage On Mack Carriers.
- [CBR 2362\-3 202604](/bulletins/11032086.md), 2026-05-04, Service bulletin: POWER TRAIN. CBR \- Mack Carrier Nut Adhesive Change.
- [TSB M\-432\-002A 032026](/bulletins/11030591.md), 2026-04-02, Service bulletin: POWER TRAIN. TSB \- Cable, Gear Selector, Replacement
- [CBR\-1008 202404](/bulletins/10253804.md), 2024-05-01, Service bulletin: POWER TRAIN. CBR: Equipped With An Automated Manual Transmission Model D or F \( AMT\-D, AMT\-F, mDrive\) Missing X1 Value In VDA And Default Settings Guidelines, ParameterP1AOB; Fault Code P1052\-54, Error 40,Or Error 18 Encountered During Clutch Or Tran.
- [CBR\-2258 202402](/bulletins/10251330.md), 2024-03-05, Service bulletin: POWER TRAIN. CBR \- Diagnostic Trouble Code \(DTC\) P107471 \- AMT\-F
- [M\-465\-001 202311](/bulletins/10246086.md), 2023-12-05, Service bulletin: POWER TRAIN. TSB: Mack Trucks now offer an improved HD Inter\-Axle Through Shaft for the CRD 125, 150, 180, and 200 family carriers. The new HD shaft went into production on January 23rd, 2023 for 2.54 \- 3.50 axle ratios and April 1st, 2023 for 3.56 \- 3.98 ratios. The new HD through shaft is an upgrade over the current standard shaft and can now be used as a replacement part instead of the standard shaft. The new HD shaft has a new design to increase strength, longevity and life over the standard shaft.
- [CBR\-2112 202307](/bulletins/10240231.md), 2023-08-02, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN; ENGINE AND ENGINE COOLING. CBR: Programming Failure \- Chassis With Cummins Engine And An Allison Transmission
- [KC\-474\-Ver5](/bulletins/10237342.md), 2023-06-05, Service bulletin: POWER TRAIN. CBR: Diagnostic Trouble Code \(DTC\) P215A\-64, Fault Code SPN 84 FMI 19
- [KC\-2112](/bulletins/10215315.md), 2022-07-05, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN; ENGINE AND ENGINE COOLING. Programming Failure \- Chassis With Cummins Engine And An Allison Transmission
- [KC\-405](/bulletins/10215295.md), 2022-07-05, Service bulletin: POWER TRAIN. Warranty Automated Manual Transmission \( AMT, I\-Shift, mDrive \) Control Housing Assembly; Guidelines For Filing A Claim For Chassis Return Visit With Transmission Issues After A Repair Requiring Control Housing Removal And Reinstallation \- US07 And N.

JSON: [/v1/bulletins/10228635](/v1/bulletins/10228635)

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