Technical Service Bulletins
Search 172,063 manufacturer communications covering 879 vehicle makes from 1955 to 2025.
Showing 449 bulletins for ALLISON
SIL 20-WT-01 Rev
Aug 16, 2019
350000 EQUIPMENT
Announces the release of a Filter Cover Bolt Hole Repair Kit
WATCH 543 Rev A
Aug 2, 2019
118000 ELECTRICAL SYSTEM:SOFTWARE
Announces release of new control software and its compatibility
FA8533EN
Jul 18, 2019
101000 POWER TRAIN:CLUTCH ASSEMBLY
Announces campaign to address a potential issue in the C3 clutch housing
19-TR-19EN
Jul 10, 2019
118000 ELECTRICAL SYSTEM:SOFTWARE
Service tip for the optional Preselect Optimization feature. The transmission will not initiate preselect downshifts when the engine brake is active, unless the service brake is simultaneously depressed. Correction: If closed throttle E
SIL 18-1K2K-19EN
Jun 16, 2019
100000 POWER TRAIN
Announces release of a high gain, non-NAS main valve body to replace the standard gain, non-NAS main valve body
SIL 17-WT-19EN
May 29, 2019
100000 POWER TRAIN
Outline of the service procedure for replacing the O-rings for the floating-bundle-transmission oil coolers
SIL 16-WT-19EN
May 29, 2019
060000 ENGINE AND ENGINE COOLING
Announces new configuration for bolts used to fasten flexplates that was made to facilitate ease of installation in certain OEM factories
SIL 15-1K2K-19EN
May 29, 2019
060000 ENGINE AND ENGINE COOLING
Announces release of new PTO gasket that increases the seal bead around the gasket corners and is interchangeable with the former design
SIL 11-EP-19EN
May 29, 2019
100000 POWER TRAIN
Announces release of a new connector for the internal-harness bulkhead that uses anodized aluminum to replace the composite plastic design
2015FA05 Rev C
Apr 17, 2019
100000 POWER TRAIN
Notice related to replacing torque converter backing plate bolt
10-TR-19EN
Apr 16, 2019
100000 POWER TRAIN
Announces additional trouble shooting steps for 5th Generation TCMs
WATCH 544 Rev A
Apr 15, 2019
100000 POWER TRAIN
Announces release of new torque converter housing that are backwards compatible with current and future torque converter housings.
SIL 28-WT-18 EN
Apr 14, 2019
100000 POWER TRAIN
Announces a change in the design of the torque converter's turbine-hub seal-ring
SIL 06-EP-19EN
Apr 7, 2019
110000 ELECTRICAL SYSTEM
Troubleshooting tips for DC-to-DC converter for high voltage DC power from the ESS to non-Allison components
SIL 08-TR-19
Mar 10, 2019
100000 POWER TRAIN
Announces change in the color of the transmission-wiring-harness connector
TT8484EN
Feb 28, 2019
100000 POWER TRAIN
Explains troubleshooting for unwanted shot to ground causing DTC P0658
TT8470EN
Feb 24, 2019
100000 POWER TRAIN
Offers service procedure for verifying a transmission fluid leak that originates from the torque converter
SIL 4-EP-19EN
Feb 10, 2019
350000 EQUIPMENT
Announces availability of re-freshed kit for Energy Storage System (ESS3) and includes installation instructions
4-EP-13EN Rev B
Feb 10, 2019
110000 ELECTRICAL SYSTEM
Relates to Increased Accessory Power 1 (IAP1) and IAP2 systems and serviceability information
6-WT-17 Rev A
Jan 25, 2019
110000 ELECTRICAL SYSTEM
Announces release of remanufactured WTEC II Electronic Control Unit (ECU) and instructions when replacing the ECU
27-EP-15EN Rev B
Jan 18, 2019
350000 EQUIPMENT
Instructions for using Amprobe Ohm Megger (Model AMB-45) for troubleshooting
2018FA08
Jan 15, 2019
100000 POWER TRAIN
Announces customer satisfaction campaign related to torque converter turbine and backing plate