NHTSA ID Number: 10245773
Manufacturer Communication Number: 120421001B
TSB/Document Date: 2023-12-04
Summary
Transfer Case Identification First Design vs. Second Design
19132998
NQH
1
Front Case Half Assembly w/gear (2) and ring (3)
19133000
NQG
1
Front Case Half Assembly w/o gear (2) and ring (3)
19255999
NP0
2
High/Low Internal Gear-Not
serviceable-part of case
assembly
NO/PN
NQG/NQH
3
High/Low Internal Gear
Retaining Ring
19133009
NQG/NQH
4
High/Low Planetary Carrier
Retaining Ring
19132997
NQG/NQH
5
High/Low Locking
Plate-Single tab design
19132996
NQG/NQH
6
Thrust Washer-Front-No tab
design
19132995
NQG/NQH
7
Input Shaft Assembly - w/pilot
bearing
19132977
NQG/NQH-w/M30
7
Input Shaft Assembly-w/pilot
bearing
19132978
NQH-w/M99
NQG/ NQH-w/MYC
Bulletin No.: 12-04-21-001B
April, 2013
Page 9
Magna Light Duty NQG/NQH/NP0 – First Design
Callout
Description
GM PN
Service Usage
7
Input Shaft Assembly-w/pilot
bearing
19255997
NP0-w/MYC
8
Pilot Bearing
19132983
NQG/NQH/NP0
9
Thrust Washer-Rear-No tab
design
19132995
NQG/NQH
10
High/Low Planetary Carrier
Assembly- Three pinion
design
19132986
NQG/NQH
11
High/Low Clutch
19260068
NQG/NQH - w/M30
19260067
NQG/NQH w/MYC and NQH
w/M99
11
High/Low Clutch
3218120
Magna Light Duty NQG/NQH/NP0 – Second Design
Callout
Description
GM PN
Service Usage
1
Front Case Half Assembly w/gear (2) and ring (3)
19299077
NQH
1
Front Case Half Assembly w/gear (2) and ring (3)
19299078
NQG
19299076
NP0
Note: The second design
NP0 front case half assembly
is interchangeable with first
design
1
Front Case Half Assembly –
w/o gear (2) and ring (3)
Page 10
April, 2013
Bulletin No.: 12-04-21-001B
Magna Light Duty NQG/NQH/NP0 – Second Design
Callout
Description
GM PN
Service Usage
2
High/Low Internal Gear-Not
serviceable-part of case
assembly
NO/PN
NQG/NQH
3
High/Low Internal Gear
Retaining Ring
14037953
NQG/NQH
4
High/Low Planetary Carrier
Retaining Ring
15547397
NQG/NQH
5
High/Low Locking Plate- three
tab design
19300745
NQG/NQH
6
Thrust Washer-Front - No tab
design
12470959
NQG/NQH
7
Input Shaft Assembly- w/pilot
bearing
19299085
NQG/NQH-w/M30
7
Input Shaft Assembly - w/pilot
bearing
19299088
7
Input Shaft Assembly-w/pilot
bearing
19255997
NP0-w/MYC
8
Pilot Bearing
19132983
NQG/NQH/NP0
9
Thrust Washer-Rear- Three
tab design
19300746
NQG/NQH
10
High/Low Planetary Carrier
Assembly- Three pinion
design
19299090
NQG/NQH
11
High/Low Clutch
19299092
NQG/NQH - w/M30
11
High/Low Clutch
19299093
NQG/NQH w/MYC and NQH
w/M99
NQH-w/M99
NQG/NQH-w/MYC
Bulletin No.: 12-04-21-001B
April, 2013
Page 11
3216484
Note: 2007-2010 MY Heavy Duty NQF transfer case
assemblies were only produced with first-design
content. Service 2007-2010 MY Heavy Duty NQG
transfer case service assemblies may contain either
first or second design content.
Magna Heavy Duty NQF/NQG/NQH – First Design
Callout
Description
GM PN
Service Usage
1
Front Case Half Assembly
w/gear (2) and ring (3)
19257420
2011-13 NQF
1
Front Case Half Assembly
w/gear (2) and ring (3)
19133000
2007-10 NQG
1
Front Case Half Assembly
w/gear (2) and ring (3)
19259038
2011-13 NQG
1
Front Case Half Assembly
w/gear (2) and ring (3)
19132998
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
19133009
NQF/NQG/NQH
4
High/Low Planetary Carrier
Retaining Ring
19132997
NQF/NQG/NQH
5
High/Low Locking
Plate-Single tab design
19132996
NQF/NQG/NQH
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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:
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