NHTSA ID Number: 10245773
Manufacturer Communication Number: 120421001B
TSB/Document Date: 2023-12-04
Summary
Transfer Case Identification First Design vs. Second Design
6
Thrust Washer-No tab
design - Front
19132995
NQF/NQGF/NQH
Page 12
April, 2013
Bulletin No.: 12-04-21-001B
Magna Heavy Duty NQF/NQG/NQH – First Design
Callout
Description
GM PN
Service Usage
7
Input Shaft Assembly w/pilot
bearing
19132979
07-10MY NQF/NQG w/MYD
and MW7
7
Input Shaft Assembly-w/pilot
bearing
19257419
2007-13 NQF/NQG w/MYD
7
Input Shaft Assembly-w/pilot
bearing
19259039
2011-13 NQF/NQG w/MW7
8
Pilot Bearing
19259040
2011-13MY NQF/NQG
w/MW7
NQH w/MYD
2007-10MY NQF/NQG/NQH w/ MW7 / MYD
8
Pilot Bearing
19132984
2007-13 NQH w/MYD
2011-13 NQF/NQG w/ MYD
9
Thrust Washer-No tab
design-Rear
19132995
10
High/Low Planetary Carrier
Assembly-Five pinion design
19132987
11
High/Low Clutch
19260067
NQG/NQH
2011-13 NQF
NQG/NQH
2011-13 NQF
NQG/NQH
2011-13 NQF
3218121
Bulletin No.: 12-04-21-001B
April, 2013
Page 13
Magna Heavy Duty NQF/NQG/NQH – Second Design
Callout
Description
GM PN
Service Usage
1
Front Case Half Assembly
w/gear (2) and ring (3)
19299079
2011-13 NQF
1
Front Case Half Assembly
w/gear (2) and ring (3)
19299078
2007-10 NQG
1
Front Case Half Assembly
w/gear (2) and ring (3)
19299080
2011-13 NQG
1
Front Case Half Assembly
w/gear (2) and ring (3)
19299077
2007-13 NQH
2
High/Low Internal Gear-Not
serviceable-part of case
assembly
NO/PN
NQF/NQG/NQH
3
High/Low Internal Gear
Retaining Ring
14037953
NQF/NQG/NQH
4
High/Low Planetary Carrier
Retaining Ring
15547397
NQF/NQG/NQH
5
High/Low Locking Plate-Two
tab design
15664905
NQF/NQG/NQH
6
Thrust Washer-No tab
design - Front
12470959
NQF/NQGF/NQH
7
Input Shaft Assembly-w/pilot
bearing
19299086
07-10MY NQG w/MYD
and MW7
7
Input Shaft Assembly-w/pilot
bearing
19299087
2011-13 NQF/NQG w/MYD
7
Input Shaft Assembly-w/pilot
bearing
19299089
2011-13 NQF/NQG w/MW7
8
Pilot Bearing
19259040
2011-13MY NQF/NQG
w/MW7
NQH w/MYD
2007-10MY NQF/NQG/NQH w/ MW7 / MYD
8
Pilot Bearing
19132984
2007-13 NQH w/MYD
2011-13 NQF/NQG w/ MYD
9
Thrust Washer-Two tab
design-Rear
15547390
10
High/Low Planetary Carrier
Assembly-Six pinion design
19299091
11
High/Low Clutch
19299093
NQG/NQH
2011-13 NQF
NQG/NQH
2011-13 NQF
NQG/NQH
2011-13 NQF
Page 14
April, 2013
Bulletin No.: 12-04-21-001B
Front Case Half Identification
2778675
The first design front case half assembly can be
identified as having an internal gear that is a 94 tooth
design with an inside diameter (a) of
148.5 mm (5.85 in).
The second design front case half assembly can be
identified as having an internal gear that is a 91 tooth
design with an inside diameter (a) of 142 mm (5.59 in).
Bulletin No.: 12-04-21-001B
April, 2013
Page 15
Input Shaft Identification
2778674
The first design input shaft can be identified as a
56 tooth design with an outside diameter (a) of
91.4 mm (3.60 in).
The second design input shaft can be identified as a
53 tooth design with an outside diameter (a) of
87.50 mm (3.44 in).
Page 16
April, 2013
Bulletin No.: 12-04-21-001B
High/Low Planetary Carrier Assembly Identification
3216481
The first-design light-duty 3-pinion high/low planetary
carrier (1) can be identified as having a 30 tooth design
with an inside diameter (a) of 61.3 mm (2.41 in). In
addition, the first-design carrier can also be identified
by the presence of a recessed washer pocket (3) at the
rear thrust washer location.
The second-design light-duty 3-pinion high/low
planetary carrier (2) can be identified as having a
29 tooth design with an inside diameter (b) of
60.2 mm (2.37 in). In addition, the second-design carrier
can also be identified by the lack of a recessed washer
pocket (4) at the rear thrust washer location.
Bulletin No.: 12-04-21-001B
April, 2013
Page 17
3216478
The first-design heavy-duty 5-pinion high/low planetary
carrier (1) can be identified as having 5 pinions and a
30 tooth design with an inside diameter (a) of
61.3 mm (2.41 in).
The second-design heavy-duty 6-pinion high/low
planetary carrier (2) can be identified as having 6
pinions and a 29 tooth design with an inside diameter
(b) of 60.2 mm (2.37 in).
Page 18
April, 2013
Bulletin No.: 12-04-21-001B
High/Low Clutch
2778672
The first design high/low clutch can be identified as
having a 30 tooth design with a gear tooth outside
diameter (a) of 65.50 mm (2.58 in).
The second design high/low clutch can be identified as
having a 29 tooth design with a gear tooth outside
diameter (a) of 63.25 mm (2.49 in).
Bulletin No.: 12-04-21-001B
April, 2013
Page 19
Component Replacement – Conversion from First Design to Second Design
2787432
It is possible to repair a first-design assembly using
second-design components. Refer to the parts catalog
and the tables above for component part number
clarification.
Note: First-design LD components are shown in the
view above.
When servicing a first-design assembly with
second-design components, the following components
MUST be replaced as a group:
1. Front Case Half Assembly – with internal gear and
retaining ring
2. Locking Plate
3.
4.
5.
6.
7.
8.
Thrust Washer (front)
Input Shaft
Pilot Bearing
Thrust Washer (rear)
Planetary Carrier Assembly
High/Low Clutch
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these
technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper
service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a
job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your
vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the
information.
WE SUPPORT VOLUNTARY
TECHNICIAN
CERTIFICATION
- 💯【Conta.ct us for Support Directly】If you met any...
- 🔥🔥🔥【2026 AUTEL FLAGSHIP MK900BT MK900-BT, NEW...
- 🚗【3000+ ACTIVE TESTS (50➡3000+), SAME AS MS...
- 🚗【40+ HOT SERVICES FOR 150 MAKES (28+➡40+)】Full...
- 🚗【OE ALL SYSTEM DIAGNOSE, AUTO SCAN 2.0: SCAN LICENSE...
- 【TURN OFF CEL】 This AL319 car scanner diagnostic tool...
- 【EXTENSIVE APPLICATION】 Autel AL319 Compatible with...
- 【FOR END USER & DIYERS】 This error code reader AL319 is...
- 【USER-FRIENDLY DESIGN】 This OBD2 scanner and check...
- 【HIGH-QUALITY SERVICES】 12 months war.ranty from the...
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: 120421001B
Replacement Service Bulletin Number:
MFR Communication Date: 2013-04-01
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: STRUCTURE
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.