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Service bulletin TSB26-056-FTL

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 id11017555
Published by NHTSA2025-05-02
Manufacturer's numberTSB26-056-FTL
Manufacturer's date2025-04-30
NHTSA componentPOWER TRAIN

NHTSA's summary

Service Solution for DT12 Oil Plug Ports

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
FREIGHTLINER 108SD2022, 2023, 2024, 2025, 2026
FREIGHTLINER 114SD2022, 2023, 2024, 2025, 2026
FREIGHTLINER BUSINESS CLASS M22023 to 2026
FREIGHTLINER CASCADIA2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026

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

Recalls for the same vehicles and component
20211742021-03-24. Powertrain
21V2090002021-03-24. POWER TRAIN:CLUTCH ASSEMBLY
20V7420002020-11-30. POWER TRAIN:CLUTCH ASSEMBLY
20204882020-10-16. Powertrain
20V6420002020-10-16. POWER TRAIN:CLUTCH ASSEMBLY
19V1370002019-02-27. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; POWER TRAIN:AUTOMATIC TRANSMISSION:GEAR POSITION INDICATION (PRNDL)
20187142018-12-19. Powertrain
18V9030002018-12-19. POWER TRAIN:CLUTCH ASSEMBLY
20175692017-11-20. Powertrain
17V7300002017-11-17. 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
CXA 09_26_Chelsea PTO2026-10-05. Other. CX Advocate for Chelsea PTO Quality Notice (TSB 26-059 FTL, TSB-26-010 WST).
MAN 00000728682026-10-05. Other. Detroit Transmissions Manual Update for Symptom Diagnostics — DT12 C/D Box Range Shift to Neutral with Reversing Events (Aborts)
TS-0004-002026-09-02. Other. Truck Equipment Manufacturer Solution for Odometer Pause & PTO Mode Delay with Customer Installed SSPTO & Controls
FleetCom 1_TransOil Cool2026-09-02. Other. Fleet Communications for eAxle Breather Hose Relocation to Reduce Water Intrusion Risk
CXA 08_26_TransOil Cooler2026-09-02. Other. CX Advocate for Transmission Oil Cooler Lines Rubbing
TS-0013-002026-08-03. Other. Truck Equipment Manufacturer Solution for PTO Mode Delay for Driving PTO
TSB-42-080-FTL2026-08-03. Service bulletin. Revised Technical Service Bulletin for ABS Wheel Speed Fault Code Correction for MBSP Equipped Vehicles. Updated frequently asked questions.
TSB-26-059-FTL2026-07-06. Service bulletin. Technical Service Bulletin for Chelsea PTO Quality Issue
CXA 06_26_H Plate2026-07-06. Other. CX Advocate for Eliminating Retaining H-Plate; Revised to Native Voss Quick­Connect
TSB-26-057-FTL2026-06-01. Service bulletin. Revised Technical Service Bulletin for DT12 OVX Transmission Refresh