# Service bulletin 24KWC/24PBC

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: 11036296
- Published by NHTSA: 2026\-08\-20
- Manufacturer's number: 24KWC/24PBC
- Manufacturer's date: 2026\-08\-13
- NHTSA component: STEERING

## NHTSA's summary

Updated Sheppard Steering Gear Classification Tool link in Inspection Procedure

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11036296-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11036296-9999.pdf)

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

## Components

Steering

## Vehicles listed

- 2025 to 2026 KENWORTH L770
- 2025 to 2026 KENWORTH T280
- 2025 to 2026 KENWORTH T380
- 2025 to 2026 KENWORTH T480
- 2025 to 2026 KENWORTH T680
- 2025 to 2026 KENWORTH T880
- 2025 to 2026 KENWORTH W990
- 2025 PETERBILT 389
- 2025 to 2026 PETERBILT 520
- 2025 PETERBILT 535
- 2025 to 2026 PETERBILT 536
- 2025 to 2026 PETERBILT 537
- 2025 to 2026 PETERBILT 548
- 2025 to 2026 PETERBILT 567
- 2025 to 2026 PETERBILT 579
- 2025 to 2026 PETERBILT 589

## Recalls for the same vehicles and component

- [2026014](/recalls/tc/2026014.md), 2026-01-19: Steering
- [26V022000](/recalls/nhtsa/26V022000.md), 2026-01-19: STEERING
- [2024732](/recalls/tc/2024732.md), 2024-12-03: Steering
- [24V908000](/recalls/nhtsa/24V908000.md), 2024-12-03: STEERING:LINKAGES:KNUCKLE:SPINDLE:ARM; STEERING:LINKAGES:TIE ROD ASSEMBLY
- [2024335](/recalls/tc/2024335.md), 2024-06-12: Steering
- [24V433000](/recalls/nhtsa/24V433000.md), 2024-06-12: STEERING:LINKAGES:TIE ROD ASSEMBLY; STEERING:LINKAGES:DRAG:LINK:CONNECTION
- [2024197](/recalls/tc/2024197.md), 2024-03-27: Steering
- [24V233000](/recalls/nhtsa/24V233000.md), 2024-03-27: STEERING:GEAR BOX:SHAFT SECTOR
- [2024036](/recalls/tc/2024036.md), 2024-01-25: Steering
- [24V044000](/recalls/nhtsa/24V044000.md), 2024-01-25: STEERING

## Other bulletins for the same vehicles and component

- [26PACA](/bulletins/11033376.md), 2026-06-03, Service bulletin: STEERING. Updated cross shaft and bearing installation steps have been added to the repair procedures.
- [46\-028](/bulletins/11033352.md), 2026-06-03, Service campaign: STEERING. Certain Peterbilt Model 520 BEV chassis with an Accelera Power Control and Accessory System \(PCAS\) were manufactured without a check valve in the power steering system.
- [24KWF/PBF](/bulletins/11030937.md), 2026-04-07, Service bulletin: STEERING. Sheppard Recall Update March 2026 \- The Parts section has been updated with revised steps for opening a TCS365 Order Support – Order Inquiry case.
- [24KWC/PBC](/bulletins/11030936.md), 2026-04-07, Service bulletin: STEERING. Sheppard Recall Update March 2026 \- The Parts section has been updated with revised steps for opening a TCS365 Order Support – Order Inquiry case.
- [15\-034](/bulletins/11029729.md), 2026-03-05, Service campaign: STEERING. Battery Electric Vehicle \(BEV\) de\-energizing and re\-energizing procedures have been added to the bulletin for Peterbilt Model 520 BEV.
- [26PACA](/bulletins/11028852.md), 2026-02-18, Service campaign: STEERING. KW: Certain Kenworth L770 chassis may have Right\-Hand \(RH\) steering cross shaft bearing mounting holes that are misaligned, resulting in increased stress on the steering cross shaft on the Right\-Hand Stand\-Up \(RHSU\) controls configuration. Failure of the RH steering cross shaft could result in the loss of RH steering control which may increase the risk of a crash. PB: Certain Peterbilt Model 520 / 520 BEV chassis may have Right\-Hand \(RH\) steering cross shaft bearing mounting holes that are misaligned, resulting in increased stress on the steering cross shaft on the Right\-Hand Stand\-Up \(RHSU\) controls configuration. Failure of the RH steering cross shaft could result in the loss of RH steering control which may increase the risk of a crash.
- [15\-034](/bulletins/11027059.md), 2026-01-06, Service bulletin: STEERING. Certain Kenworth L770 and Peterbilt Model 520 chassis may encounter a slight increase in effort in the right\-hand steering shaft when turning the wheel.
- [24PBK](/bulletins/11013796.md), 2025-02-05, Service bulletin: STEERING. Safety Recall Specific 2024 Peterbilt Model 367, 389, 548, and 2024\-2025 520 and 567 chassis equipped with a PACCAR 20k Steer Axle have been identified as having steering arm and/or tie rod arm fasteners that may be improperly torqued and can be at risk of failing. If both fasteners in either steering arm or tie rod arm fail, there may be a loss of steering control, which could increase the risk of a crash. Affected chassis will have all steering arm and tie rod arm bolts removed, replaced with new bolts, and torqued properly.
- [24KWK](/bulletins/11013790.md), 2025-02-05, Service bulletin: STEERING. Safety Recall Parts and procedures are now available. Certain Kenworth model T480, T800, T880, and W990 equipped with a PACCAR 20k Steer Axle have been identified as having steering arm and/or tie rod arm fasteners that may be improperly torqued and can be at risk of failing. If either steering arm or tie rod arm fasteners fail, there may be a loss of steering control, which could increase the risk of a crash. Affected chassis will have all steering arm and tie rod arm bolts removed, replaced with new bolts, and torqued properly.
- [24PBK](/bulletins/11012374.md), 2025-01-07, Service bulletin: STEERING. Interim Safety Recall Specific 2024 Peterbilt model 367, 389, 548, and 2024\-2025 Peterbilt 520 and 567 chassis equipped with a PACCAR 20k Steer Axle have been identified as having steer arm and/or tie rod arm fasteners that may be improperly torqued and can be at risk of failing. If both fasteners in either steering arm or tie rod arm fail, there may be a loss of steering control, which could increase the risk of a crash. At this time, parts are not available to complete the necessary repairs. This bulletin will be updated when parts become available.

JSON: [/v1/bulletins/11036296](/v1/bulletins/11036296)

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