# Service bulletin 27\-026

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: 10186161
- Published by NHTSA: 2021\-02\-01
- Manufacturer's number: 27\-026
- Manufacturer's date: 2016\-07\-28
- NHTSA component: POWER TRAIN; ENGINE

## NHTSA's summary

Eaton ultrashift plus excessive engine over\-speed lamp on.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2016/MC-10186161-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2016/MC-10186161-9999.pdf)

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

## Components

Engine, Transmission and driveline

## Vehicles listed

- 2011 to 2012 KENWORTH T2000
- 2011 to 2017 KENWORTH T660
- 2013 to 2017 KENWORTH T680
- 2011 to 2014 KENWORTH T700
- 2011 to 2017 KENWORTH T800
- 2013 to 2017 KENWORTH T880
- 2011 to 2017 KENWORTH W900

## Recalls for the same vehicles and component

- [18V657000](/recalls/nhtsa/18V657000.md), 2018-09-21: ENGINE AND ENGINE COOLING:ENGINE:DIESEL
- [18V092000](/recalls/nhtsa/18V092000.md), 2018-02-02: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; POWER TRAIN:AUTOMATIC TRANSMISSION:GEAR POSITION INDICATION \(PRNDL\)
- [2016289](/recalls/tc/2016289.md), 2016-06-08: Engine
- [15V639000](/recalls/nhtsa/15V639000.md), 2015-10-09: POWER TRAIN:MANUAL TRANSMISSION
- [15V597000](/recalls/nhtsa/15V597000.md), 2015-09-24: ELECTRICAL SYSTEM:IGNITION:MODULE; ENGINE AND ENGINE COOLING:ENGINE
- [2015418](/recalls/tc/2015418.md), 2015-09-23: Engine
- [15V310000](/recalls/nhtsa/15V310000.md), 2015-05-26: POWER TRAIN:DRIVELINE:DRIVESHAFT
- [15V196000](/recalls/nhtsa/15V196000.md), 2015-04-03: POWER TRAIN:AXLE ASSEMBLY

## Other bulletins for the same vehicles and component

- [P001](/bulletins/11037541.md), 2026-09-29, Service bulletin: ENGINE. "Kenworth: Dealers should check the chassis list and SIR weekly for VIN changes. 2 chassis added to the chassis list. Peterbilt: Dealers should check the chassis list and SIR weekly for VIN changes. 10 chassis added to the chassis list."
- [E343](/bulletins/11037451.md), 2026-09-23, Service bulletin: ENGINE. An exhaust manifold slip joint seal kit is now available for EPA 2017\-2024 PACCAR MX\-13 engines.
- [E311](/bulletins/11035111.md), 2026-07-21, Service bulletin: ENGINE. The Condition, Chassis Affected, Service Action, Warranty, and Procedure sections have been updated to include the latest prognostics bulletin verbiage.
- [26\-035](/bulletins/11035107.md), 2026-07-21, Service bulletin: POWER TRAIN. Updated Eaton's TAIB0885EN Bulletin link.
- [45\-070](/bulletins/11032293.md), 2026-05-06, Service bulletin: ENGINE. The attached procedures document has been updated with more detail and explanations. This is not a stand\-alone procedure. Cummins Quickserve troubleshooting will specify the use of these procedures while troubleshooting specific fault codes.
- [E326](/bulletins/11032284.md), 2026-05-06, Emissions: ENGINE; ELECTRICAL SYSTEM. EPA17\-24 MX Fuel Injector Connector \- This bulletin has been revised to include all EPA17\-24 and CARB24 PACCAR MX engines.
- [E326](/bulletins/11030922.md), 2026-04-07, Emissions: ENGINE. EPA17\-24 MX\-13 Fuel Injector Connector \- This bulletin has been revised to include EPA24 PACCAR MX\-13 engines.
- [45\-070](/bulletins/11028314.md), 2026-02-05, Service bulletin: ENGINE. Procedure pictures updated for clarity. When troubleshooting Cummins X15 fault codes 555 or 556, follow this additional testing, inspection, and documentation procedure to help identify the root cause of dusted engines. This is not a stand\-alone process but must be used alongside Cummins troubleshooting steps. Cummins Quickserve will reference this bulletin for fault codes 555 or 556.
- [E304](/bulletins/10244494.md), 2023-11-10, Service bulletin: ENGINE AND ENGINE COOLING. E304: PACCAR MX\-11 and MX\-13 EMY2016 NOx and N2O Exceedance Emissions Recall Certain vehicles with PACCAR MX\-11 and MX\-13 EMY2016 engines with less than 300,000 miles \(482,803 km\) have been shown, in testing, to exceed regulatory limits for NOx and N2O emissions. This bulletin now applies to both Canadian and U.S.\-registered vehicles. Software is now available to remedy this emissions non\-compliance. NOTE California\-registered vehicles that received a letter must have the software updated AND California documentation completed regardless of vehicle mileage.
- [E293](/bulletins/10238385.md), 2023-07-05, Service bulletin: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; ENGINE AND ENGINE COOLING. Emissions Recall Certain Vehicle Model Year 2017\-2019 chassis equipped with EPA2017 compliant PACCAR MX\-13 engines have an EGR flex pipe that can develop cracks and leak untreated exhaust. The EGR Flex pipe will be replaced if it has a suspect part number.

JSON: [/v1/bulletins/10186161](/v1/bulletins/10186161)

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