NHTSA ID Number: 10156677
Manufacturer Communication Number: TT7399EN
TSB/Document Date: 2019-04-08
Summary
Tech Tip concerning Transmission Control Module (TCM) Recalibration for Kenworth
TC551
E017592
G018817
21926
TC561
393097
T800
6610366828
E017742
G018818
21927
TC551
E017592
G018817
21926
TC561
393098
T800
6610366827
E017742
G018818
21927
TC551
E017592
G018817
21926
TC561
393099
T800
6610366869
E017742
G018818
21927
TC551
E017592
G018817
21926
TC561
393100
T800
6610366870
E017742
G018818
21927
TC551
E017592
G018817
21926
TC561
393375
T800
6610366863
E017581
G018837
21927
TC551
E017481
G018816
21926
TC561
393398
T800
6610366864
E017581
G018837
21927
TC551
E017481
G018816
21926
TC561
394083
T800
6610368453
E017578
G019084
21928
TC541
E017544
G020240
21926
TC561
394294
T800
6610369821
E018264
G019277
21927
TC551
E018356
G019789
21926
TC561
396282
T800
6610368081
E017581
G018837
21927
TC551
E017481
G018816
21926
TC561
396443
T800
6610367742
E017581
G018837
21927
TC551
E017481
G018816
21926
TC561
397331
T800
6610368857
E017581
G018837
21927
TC551
E017481
G018816
21926
TC561
401853
T800
6610375421
E017481
G018816
21926
TC561
No torque converter parts change
necessary. Confirm TC561 in
TCM calibration.
No torque converter parts change
necessary. Confirm TC561 in
TCM calibration.
Copyright © 2013 Allison Transmission, Inc. All Rights Reserved.
TT7399EN
October, 2013
Page 3 of 7
Service Procedure:
Engine torque management features require that the torque converter type is properly set in the TCM calibration;
therefore, a calibration update is required. A new calibration must be reflashed into the TCM with the torque
converter type set to TC561.
Kenworth orders base model calibrations from Allison Transmission and customizes calibration settings using a
Vehicle Electronic Programming Station (VEPS) in their manufacturing operations. Therefore, no fully calibrated
Allison TCM part number is available. Refer to the following procedure to obtain a replacement TCM calibration
part number to enter into Allison TCM ReflashTM and load into the TCM.
1. Log onto the Allison Extranet.
2. Launch the Allison Calibration Configuration Tool (ACCT) for Allison 5th Generation Controls. Refer to
Figure 1.
Figure 1. Launching ACCT
3. From the MANAGE REQUESTS screen, click on the “New Request” button.
Figure 2. New Request
Copyright © 2013 Allison Transmission, Inc. All Rights Reserved.
TT7399EN
October, 2013
Page 4 of 7
4. In the NEW REQUEST screen, click on the “Retrieve PAR” button. Refer to Figure 3.
Figure 3. Retrieve PAR
5. Enter either the Vehicle Identification Number (VIN) or TCM serial number into the appropriate parameter
search field and the click “Retrieve“ button.
Figure 4. Retrieving PAR File
a. If the following message is displayed (refer to Figure 5), perform the actions in step 5b; otherwise,
proceed to Step 6.
Copyright © 2013 Allison Transmission, Inc. All Rights Reserved.
TT7399EN
October, 2013
Page 5 of 7
Figure 5. PAR File Not Found
b. Connect Universal Allison DOC® to the vehicle and make a Customer Modifiable Constant (CMC)
change using the DOC reprogramming menu. Then, reconnect the laptop to the Internet and launch
Allison DOC® to return the TCM calibration settings to the Allison server. Allow approximately 15
minutes then repeat steps 1 through 5. If this continues to be unsuccessful, contact the Allison
Technical Assistance Center (TAC) at (800) 2525283. Provide the Vehicle Identification Number
(VIN) and TCM serial number.
6. Enter distributor code, product family, release, vocational model, TCM type, and Service for PAR file type in
the REQUEST DETAILS screen. Click on the Create button.
Figure 6. Request Details – Create
Copyright © 2013 Allison Transmission, Inc. All Rights Reserved.
TT7399EN
October, 2013
Page 6 of 7
7. Select Marketing Region in the drop down list. Click “Basic” tab on left side of page.
Figure 7. Select Marketing Region – Basic Tab
8. Change Torque Converter selection to TC561 in drop down list. Click “Submit” button at the top of the
page. Refer to Figure 8.
Copyright © 2013 Allison Transmission, Inc. All Rights Reserved.
TT7399EN
October, 2013
Page 7 of 7
Figure 8. Torque Converter Selection
a. Verify Engine Governed Speed is set to 1800 RPM. If Engine Governed Speed is not set to 1800 RPM,
save the request. Contact Allison TAC at (800) 2525283 before submitting the service calibration
request in ACCT.
9. Monitor your email for the approved Allison calibration part number.
10. Use Allison TCM ReflashTM to load calibration part number provided in step 9.
11. Notify Allison TAC at (800) 2525283 of the transmission serial number, VIN, and TCM serial number
associated with this repair.
12. The Allison warranty department will update Unit History to reflect the transmission’s new torque converter
type, TC561.
NOTE: The issue outlined in this document is not an Allison Transmission defect in material or
workmanship. Invoice for repairs are to be presented to the Kenworth dealer, not to the customer/driver.
For further information regarding this issue, please reference Kenworth TIB 27002: Allison Transmission Has
Incorrect Torque Converter for the Application.
Copyright © 2013 Allison Transmission, Inc. All Rights Reserved.
- CUTTING EDGE TECHNOLOGY - Shockproof technology designed to...
- QUIET SMOOTH SHIFTING - V-Twin Transmission oil dampens...
- IMPROVES PERFORMANCE - Transmission fluid that dramatically...
- POPULAR POWESPORTS OIL FOR - UTVs & Side by Sides, ATVs...
- WHY RED LINE - Established in 1979, Red Line Products...
- CUTTING EDGE TECHNOLOGY - Shockproof technology designed to...
- QUIET SMOOTH SHIFTING - V-Twin Transmission oil dampens...
- IMPROVES PERFORMANCE - Transmission fluid that dramatically...
- POPULAR POWESPORTS OIL FOR - UTVs & Side by Sides, ATVs...
- WHY RED LINE - Established in 1979, Red Line Products...
If the PDF is very large, it may not load in the preview below.
Some older TSBs had multiple PDFs — visit the NHTSA Website to view all PDFs.
If the TSB PDF does not show, download or view it on the NHTSA Website.
Click on the (+) Plus Sign
Then Click on Associated Document(s)
Search NHTSA Database for Recalls
Search NHTSA Database for Vehicle Investigations
View Latest Vehicle Investigations
Search NHTSA Database for Vehicle Complaints
View Latest Vehicle Complaints
TSB/Document ID: TT7399EN
Replacement Service Bulletin Number:
MFR Communication Date: 2013-10-02
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
- [Notice] When you receive a used device, it may be a customer return resold by Amazon without inspection. You can exchange it for a new one through Amazon. As this situation is unavoidable, we sincerely apologize. For any issues, contacting us via Amazon's "Messages" is the best way. THINKSCAN 689BT Bidirectional Scan Tool Can Be Used Immediately After It is Turned On, Without Complicated Registration Process, Which is More Convenient & Quick.
- Full Bi-Directional Control & 3000+ Active Tests: Take control and test components like actuators, fuel injectors, relays, and cooling fans in real time. You’ll quickly see if the problem is in the part itself or the control module — saving you hours of guesswork and frustrating trial-and-error.
- Advanced ECU Coding Capabilities: Handle module matching and hidden feature activation with confidence. When you replace an ECU or want to customize settings, this obd2 scanner diagnostic bi directional tool gives you the professional-level capabilities you need without the dealership price tag.
- 34+ Useful Reset and Maintenance Functions: Complete everyday service tasks smoothly with a wide range of helpful reset and maintenance functions. Whether you’re keeping up with regular upkeep or tackling a specific job, this scanner makes maintenance simpler and less stressful for both DIYers and pros.
- Comprehensive Full System Diagnostics: Diagnose every major system — Engine, Transmission, ABS, SRS, TPMS, and more — all in one place. Finally stop wondering if you’re missing something important; get the full picture and clear codes with ease.
- Top Reasons to Choose the D7S OBD2 Scanner: XTOOL D7S car scan tool, an upgrade of XTOOL D7, offers comprehensive features for automotive technicians, workshops, and DIY enthusiasts 1. Upgraded Hardware: 2+64GB memory, rear camera, intuitive interface, foldable bracket 2. Complete Diagnostics: FCA
Autoauth, OE-level all system scan, 39+ maintenance services, 4K+ bidirectional, CANFD/DoIP protocol 3. Advanced Capabilities: ECU c0ding, PMI functions 4. Wide Compatibility: Support 10,000+ models, covering 99% vehicle brands 5. Multi-language: Available in 22+ languages, No IP Restrictions 6. 3-Year Updates: Save 300 bucks on software updates for the latest features and optimizations - 2026 Upgraded D7S Car Scanner Features: The newly 2026 D7S V2.0 scanner for car brings exciting features for advanced vehicle diagnostics and enhanced user experience 1. FCA AutoAuth: Now supports FCA SGW module for Chrysler, for Jeep, for Dodge (2018+), for Fiat (2017+), enabling faster vehicle communication without gateway restrictions 2. PMI (Offline ECU Pr0gramming): Allows for Ford, for Lincoln, and for Mazda ECU pr0gramming for new modules 3. Optimized Diagnostic Report 2.0: Personalized reports with logos and customer info for auto shops. Note: Compatibility varies by cars, please check before order
- 39+ Services/Resets/Adaptations/Relearns/Calibrations: XTOOL D7S full system car scanner diagnostic tool tackles 99% of common car issues through its 36+ special functions, including Oil Reset, EPB, SAS, BMS, Throttle Reset, Injector C0ding, ABS Bleed, TPMS Reset, Power Balance, etc and also covers specific-vehicle functions like Crank Sensor Relearn, ABS Initialization, Cylinder Power Balance, Fuel Trim Reset, Idle Relearn etc. This car diagnostic scanner enhances efficiency, making repairs and maintenance hassle-free. Tip: DO NOT for All vehicles, please check compatibility first
- Cost-effective ECU C0ding Scan Tool for Specific Brands: Enhance your vehicle's performance with XTOOL D7S! This obd2 scanner all systems bidirectional offers advanced capabilities at an affordable price, supports online for BMW, for Benz and offline for BENZ, for MIT, along with PMI functions for Ford, for Mazda, and for Lincoln. Ideal for technicians and DIY enthusiasts, this automotive scanner diagnostic tool optimizes vehicle performance and enhances the driving experience. Note: Not for all cars and modules, please send car VIN to check the compatibility before purchase
- OE All System Diagnostic & 8 Pids Graphing: XTOOL D7S is a comprehensive all system bi directional obd2 scanner that delivers dealer-level diagnostics, completely controlling over your vehicle’s performance and health. This automotive scan tool can read and clear DTCs, view live data and ECU information, retrieve freeze frames, and perform active tests and full obd2 functions. This bi-directional scan tool can can identify your vehicle's make, model, and year information with just one click and show up to 8 PIDs live data with options for CSV viewing, playback, and recording for in-depth analysis. It is easy-to-use for both professionals and beginners, helping pinpoint issues efficiently
- 【✅Compared to BOSSCOMM IF742, IF745 Offers Full-System Diagnostics】The BOSSCOMM IF745 car diagnostic scanner is an upgraded model of IF742. In addition to supporting all OBD2 Code Reader functions and 6 reset options (ABS/EPB/SAS/BMS/Oil/Throttle), it expands diagnostics from 4 systems (Check Engine/ABS/SRS/Transmission) to vehicle All systems, including Steering, Suspension, and Body Electronics. This provides deeper, more comprehensive diagnostic capabilities.
- 【✨10 OBD2 Functions】The BOSSCOMM IF745 scan tool’s DTC Lookup instantly translates fault codes into user-friendly explanations, its I/M Readiness feature streamlines emissions testing with a single tap, and Freeze Frame lets you pinpoint the exact moment of a fault for in-depth root-cause diagnosis. Combined with a live data dashboard and advanced diagnostics (O2S, OBMon, EVAP), it delivers comprehensive insights for confident troubleshooting.
- 【✨Deep Diagnostics for All Vehicle System Modules】Beyond code reading/clearing and ECU information retrieval, our all-in-one data stream feature lets you inspect all current fault codes and their locations across the vehicle’s systems. This vehicle code reader helps you turn off dashboard warning lights and perform a comprehensive self-check of your car at home—no more back-and-forth trips to the repair shop or hefty inspection fees.
- 【✨6 Essential Resets: ABS Bleeding, Oil, EPB, SAS, Throttle, BMS】The BOSSCOMM IF745 obd2 scanner diagnostic tool swiftly purges air from brake lines to restore braking sensitivity, fine-tunes maintenance cycles to eliminate false alerts, resolves parking brake issues with one-click control, recalibrates steering sensors for stability, optimizes engine idling/acceleration for smoother performance, and deeply resets battery systems to extend lifespan and range via precise parameter adjustments.❗NOTE: Does NOT support bidirectional control, coding, or programming.
- 【✨10,000+ Car Models, AutoVIN, 13 Languages】The BOSSCOMM IF745 vehicle scanner diagnostic tool covers 73+ global car brands and offers support in 13 languages, making it perfect for DIYers, auto mechanics, or as a thoughtful gift. With a single-click AutoVIN feature, it instantly retrieves vehicle serial numbers, streamlining diagnostics for users globally. This adaptable tool balances user-friendliness with precision, catering to both personal and professional requirements.✅Unsure about compatibility? Compatibility will vary on vehicles' model and year, pls reach us via 📧 [email protected] 📧 before purchase.
This product presentation was made with AAWP plugin.