# Service bulletin 26\-035

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: 11035107
- Published by NHTSA: 2026\-07\-21
- Manufacturer's number: 26\-035
- Manufacturer's date: 2026\-07\-03
- NHTSA component: POWER TRAIN

## NHTSA's summary

Updated Eaton's TAIB0885EN Bulletin link.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11035107-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11035107-9999.pdf)

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

## Components

Transmission and driveline

## Vehicles listed

- 2017 to 2020 KENWORTH T680
- 2017 to 2020 KENWORTH T880
- 2018 to 2020 KENWORTH W990

## Recalls for the same vehicles and component

- [20V506000](/recalls/nhtsa/20V506000.md), 2020-08-26: POWER TRAIN:AXLE ASSEMBLY
- [19V911000](/recalls/nhtsa/19V911000.md), 2019-12-19: POWER TRAIN:AXLE ASSEMBLY:AXLE SHAFT; POWER TRAIN:DRIVELINE:DRIVESHAFT
- [2019118](/recalls/tc/2019118.md), 2019-03-07: Powertrain
- [2018739](/recalls/tc/2018739.md), 2018-12-24: Powertrain
- [18V931000](/recalls/nhtsa/18V931000.md), 2018-12-21: POWER TRAIN:CLUTCH ASSEMBLY
- [18V092000](/recalls/nhtsa/18V092000.md), 2018-02-02: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; POWER TRAIN:AUTOMATIC TRANSMISSION:GEAR POSITION INDICATION \(PRNDL\)
- [2017664](/recalls/tc/2017664.md), 2017-12-28: Powertrain
- [17V840000](/recalls/nhtsa/17V840000.md), 2017-12-22: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\)

## Other bulletins for the same vehicles and component

- [E311](/bulletins/11022496.md), 2025-09-03, Other: ENGINE; POWER TRAIN. Condition, Chassis Affected, and Warranty sections updated with the following verbiage “E311 must be flagged and open in Service Information Record \(SIR\) at the time of RO open date to qualify.” Also, “Through Standard Warranty or any applicable active Extended Warranty” verbiage was removed from Warranty section.
- [45\-065](/bulletins/10243358.md), 2023-10-03, Service bulletin: ENGINE AND ENGINE COOLING; POWER TRAIN. Certain T680 Next Gen Cummins X15 have fan hub bracket hardware that is under torqued and could become loose and/or fail. Procedures are available to replace and properly torque the hardware.
- [T012](/bulletins/10206097.md), 2022-01-06, Service bulletin: POWER TRAIN. Non\-Safety Campaign: Drivers of vehicles equipped with PACCAR TX\-12 transmissions may experience harsh shifts and gear grinding noise. Premature Main Drive Gear damage may occur due to clutch housing and main case countershaft bearing bore wear.
- [26\-038](/bulletins/10206084.md), 2022-01-06, Service bulletin: POWER TRAIN. Non\-Safety Campaign: Eaton Endurant transmissions may experience premature Main Drive Gear damage due to clutch housing and main case countershaft bearing bore wear. A Clutch Housing Front Cover Kit will be installed to address the issue.
- [27\-026](/bulletins/10186161.md), 2021-02-01, Service bulletin: POWER TRAIN; ENGINE. Eaton ultrashift plus excessive engine over\-speed lamp on.
- [26\-037](/bulletins/10185190.md), 2021-01-06, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN; EQUIPMENT ADAPTIVE/MOBILITY. Fix\-As\-Fail \- Prior versions of Eaton Endurant transmission software may be prone to setting Linear Clutch Actuator \(LCA\) fault codes leading to possible LCA hardware replacement.
- [26\-035](/bulletins/10185189.md), 2021-01-06, Service bulletin: POWER TRAIN; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. Non\-safety campaign: Vehicles equipped with an Eaton Endurant 12 speed transmission may experience transmission service lamp activation, no gear engagement from neutral, and/or DTC 511 FMI 7 or 10 is set. Resolution is to update the transmission software and calibrations.
- [T010](/bulletins/10185188.md), 2021-01-06, Service bulletin: EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN. Non\-Safety Campaign – Vehicles with PACCAR transmissions may experience transmission service lamp activation, no gear engagement from neutral, and/or DTC 511 FMI 7 or 10 is set. Transmission software and shift calibration updates are available to resolve
- [A003](/bulletins/10182207.md), 2020-11-05, Service bulletin: POWER TRAIN; STEERING. PACCAR has determined that all Set Forward Front Axle \(SFFA\) models with the PACCAR 20K front steer axle and wide\-based tires have the potential to experience a shimmy or shake in the front axle. Wide\-based tires include any series tires with widths of 385 mm or higher. This is due a lack of friction in the current axle rotating components. Replacing the thrust roller bearing with a thrust washer assembly creates enough friction to eliminate the shimmy.
- [22\-016](/bulletins/10169711.md), 2020-01-04, Service bulletin: EQUIPMENT ADAPTIVE/MOBILITY; WHEELS; POWER TRAIN; EQUIPMENT. This bulletin has been obsoleted and replaced by Safety Recall 19KWE.

JSON: [/v1/bulletins/11035107](/v1/bulletins/11035107)

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