WenmarOpen by Wenmar Pro

Service bulletin 23PBE

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10241496
Published by NHTSA2023-09-01
Manufacturer's number23PBE
Manufacturer's date2023-08-21
NHTSA componentPOWER TRAIN

NHTSA's summary

Safety Recall Certain vehicles built with TX-8 transmissions with flange mounted yokes may not have a locking feature installed on fastener threads. This may allow the driveline fasteners to become loose, increasing the risk of a crash.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Transmission and driveline

Vehicles listed
PETERBILT 5362023, 2024
PETERBILT 5372023, 2024
PETERBILT 5482023
PETERBILT 5482024

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
20250182025-01-16. Powertrain
24V9030002024-12-02. POWER TRAIN:AXLE HUBS
24V1900002024-03-20. POWER TRAIN:AUTOMATIC TRANSMISSION:LEVER AND LINKAGE:COLUMN SHIFT
20241612024-03-08. Powertrain
20234372023-08-04. Powertrain
23V5040002023-07-21. POWER TRAIN:DRIVELINE
22V4250002022-06-15. POWER TRAIN:AUTOMATIC TRANSMISSION

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
T0172026-10-01. Service bulletin. Information has been added to identify that ECAT incorrectly identifies PS386 as the correct transmission oil for TX-8 transmission on certain vehicles.[
24PBE2025-12-05. Service campaign. The right-hand shift stalk may have an improper wire harness terminal crimp within the wire harness connector. Loss of communication between the right-hand shift stalk and the vehicle may result in the vehicle being disabled after it comes to a stop, thereby increasing the risk of crash or injury. A warning will appear on the dash display when communication is lost, including transmission or engine warnings, “!” next to DNR/DNRP indicator, “-“ in the DNR/DNRP indicator, and/or chimes, depending upon whether you are operating a diesel/gas or battery electric vehicle.
24PBJ2025-08-05. Service bulletin. "Safety Recall Parts and repair procedures are now available. Certain Meritor 10-16K and 18-23K Front Steer Drive Axles may have insufficient wheel bearing grease. Insufficient lubrication in the wheel bearing may cause the wheel hub to overheat and become damaged, which may increase the risk of a crash or thermal event . The driver may hear noise, excessive steering play, and/or smoke from the front wheel.
T020 - PB2025-04-04. Service bulletin. Fix-As-Fail Certain Model 535, 536, 537, and 548 chassis equipped with a PACCAR TX-8 transmission received transmission software with an incorrect variable. This software issue may cause DTC 521215-2 to set, the Transmission Dash Light to Illuminate, and shifting to be restricted. A software update is now available to fix the issue. Fix-as-Fail start date: 03/19/2025.
E3072024-05-04. Service bulletin. CARB Emission s Manufacturer Warranty term and/or kilometers conversion displayed in certain EMY 2022-2023 PX-7 or PX-9 Operator’s Manuals are incorrect.
24PBE2024-04-03. Service bulletin. INTERIM Safety Recall Parts are not currently available for this safety recall. This bulletin will be updated once repair parts are available. The right-hand shift stalk may have an improper wire harness terminal crimp within the wire harness connector. Loss of communication between the right-hand shift stalk and the transmission may result in the vehicle becoming disabled after it comes to a stop thereby increasing the risk of crash or injury. A transmission fault will appear on the dash display if communication is lost.