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Service bulletin KC-626

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 id10213630
Published by NHTSA2022-06-07
Manufacturer's numberKC-626
Manufacturer's date2022-05-09
NHTSA componentPOWER TRAIN

NHTSA's summary

Mack Chassis - Vehicles Equipped With An Automated Manual Transmission Model F ( AMT-F, mDrive ), Premium Tech Tool ( PTT ) Gearbox Calibration Failure; Gearbox Calibration Operation Stops And Fails At 33% When Run With Transmission Removed

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
MACK ALL W MODELS1974 to 1977
MACK ALL W/FAW617 FRONT AXLE1985 to 1990
MACK ANTHEM (AN)2016 to 2017
MACK ANTHEM (AN)2018, 2019, 2020, 2021, 2022 (the catalog's model; the bulletin names a series or trim of it)
MACK ASET
MACK B1965 to 1967
MACK C1964 to 1971
MACK CF1964 to 1980
MACK CF1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992
MACK CH
MACK CH1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
MACK CH2006 to 2007
MACK CH SERIES1989
MACK CH6001989
MACK CH6001995 to 1997
MACK CH6002001
MACK CH6121996 to 1998
MACK CH6131993 to 1994
MACK CH6131996 to 1998
MACK CHK SERIES
MACK CHN2002, 2003, 2004, 2005, 2006, 2007, 2008
MACK CHR1987 to 1992
MACK CHU
MACK CHU2006 to 2018
MACK CHU6122008
MACK CHU6132008
MACK CHU6132010
MACK CHU6142010
MACK CL
MACK CL1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
MACK CL7132000
MACK CL7332000
MACK CLASS 6
MACK CLASS 7
MACK CLASS 8
MACK CLASS 81987 to 1988
MACK CM4001987 to 1988
MACK CMH2010 to 2012
MACK CMM2010 to 2013
MACK CONQUEST1996 to 1998
MACK CRD SERIES
MACK CRD112/113
MACK CRD200
MACK CRD92/93
MACK CS 2001985 to 1986
MACK CS 2001994
MACK CS 200P1985 to 1987
MACK CS 2501985 to 1986
MACK CS 2501994
MACK CS 250P1985 to 1987
MACK CS 300
MACK CS 3001985 to 1986
MACK CS 300P
MACK CS 300P1988
MACK CS 300T1988
MACK CS SERIES
MACK CT2004 to 2008
MACK CT7132008
MACK CTP2006 to 2008
MACK CV
MACK CV1998 to 2008
MACK CV5002002 to 2003
MACK CV7132006 to 2007
MACK CX
MACK CX1998 to 2007
MACK CX6132001 to 2003
MACK CXN2002 to 2008
MACK CXP2006 to 2008
MACK CXU
MACK CXU2006 to 2018
MACK CXU6122008
MACK CXU6122010 to 2011
MACK CXU6132008
MACK CXU6132010
MACK CXU613E2010
MACK CXU6142010
MACK DM
MACK DM1965 to 1979
MACK DM1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995
MACK DM1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
MACK DM SERIES
MACK DM SERIES1980 to 1981
MACK DM SERIES1983 to 1984
MACK DM SERIES1987 to 1989
MACK DM400
MACK DM4001971 to 1972
MACK DM4001975 to 1976
MACK DM61999
MACK DM62003
MACK DM600
MACK DM6001971 to 1972
MACK DM6001975 to 1976
MACK DM6002002
MACK DM6116S1972
MACK DM6856S1972
MACK DM6858S1972
MACK DM8001968 to 1969
MACK DM807
MACK DM809
MACK DM811
MACK DM8861974
MACK DMM1972 to 1980
MACK DMM1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992
MACK DMM2000, 2001
MACK DMM2003
MACK DMM SERIES (the catalog's model; the bulletin names a series or trim of it)
MACK DMM SERIES1980
MACK DMM SERIES1981 (the catalog's model; the bulletin names a series or trim of it)
MACK DMM SERIES1987, 1988 (the catalog's model; the bulletin names a series or trim of it)
MACK E6
MACK E7
MACK F1965 to 1979
MACK F SERIES
MACK F SERIES1968 to 1976
MACK F SERIES1978 to 1982
MACK F7951969 to 1972
MACK F795ST1974
MACK F7971969 to 1972
MACK FAP1968 to 1976
MACK FC1968 to 1976
MACK FCA1968 to 1976
MACK FCM71331999 to 2002
MACK FCM71332004
MACK FCS1968 to 1976
MACK FDM
MACK FDM1987, 1988, 1989, 1990, 1991, 1992, 1993
MACK FDM1996, 1997
MACK FDM7133R1996, 1997, 1998 (the catalog's model; the bulletin names a series or trim of it)
MACK FIRE TRUCK1982 to 1987
MACK FL1966 to 1977
MACK FL7951970 to 1974
MACK FL7971970 to 1974
MACK FM1979
MACK FM SERIES1978 to 1982
MACK FREEDOM
MACK FS1966 to 1977
MACK FS7951970 to 1974
MACK FS7971970 to 1974
MACK FWS1978 to 1979
MACK GRANITE (GR)2018, 2019, 2020, 2021, 2022, 2023 (the catalog's model; the bulletin names a series or trim of it)
MACK GRANITE (GU)2007 to 2016
MACK GRANITE (GU)2017 (the catalog's model; the bulletin names a series or trim of it)
MACK GU
MACK GU2006 to 2018
MACK GU72006 to 2007
MACK GU7132008
MACK GU7132010
MACK GU82006 to 2007
MACK GU812E2010
MACK GU8132008
MACK GU8132010
MACK GU813E2010
MACK GU8142010
MACK HMM1972 to 1977
MACK HMM6856S1973 to 1977
MACK J-TECH
MACK LE
MACK LE1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
MACK LEU2007 to 2017
MACK LL1968 to 1969
MACK LR
MACK LR2010 to 2014
MACK LR2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
MACK LR ELECTRIC2020 to 2023
MACK LR62011 to 2016
MACK M35AK
MACK M65BX
MACK MACK
MACK MACK1955 to 1999
MACK MACK2001
MACK MB1965 to 1979
MACK MB SERIES
MACK MB SERIES1968
MACK MB SERIES1978 to 1982
MACK MB4001969 to 1971
MACK MB6001969 to 1971
MACK MC1977 to 1979
MACK MC1987, 1988, 1989, 1990, 1991, 1992
MACK MC SERIES1978 to 1984
MACK MC400
MACK MC600
MACK MC6001979 to 1981
MACK MC6061982 to 1984
MACK MD2020, 2021, 2022, 2023
MACK MH
MACK MH1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993
MACK MHR1987 to 1992
MACK MID-LINER1983 to 1985
MACK MID-LINER1990
MACK MIDLINER
MACK MIDLINER1986 to 1989
MACK MIDLINER1998 to 1999
MACK MIDR
MACK MILITARY VEHICLE
MACK MR
MACK MR1977 to 1979
MACK MR1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
MACK MR SERIES
MACK MR SERIES1978 to 1982
MACK MR SERIES1987

And 144 more lines, in the JSON.

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

Recalls for the same vehicles and component
10V0690002010-03-03. POWER TRAIN:AXLE ASSEMBLY
09V2400002009-06-30. POWER TRAIN:AXLE ASSEMBLY
96V2550001996-12-23. POWER TRAIN:DRIVELINE:UNIVERSAL JOINT
94V2160001994-11-01. POWER TRAIN:DRIVELINE:CENTER SUPPORT BEARING
19931501993-11-12. Powertrain
93V1760001993-11-01. POWER TRAIN:DRIVELINE
19930251993-03-03. Powertrain
19911531991-11-19. Powertrain
91V1960001991-10-21. POWER TRAIN:MANUAL TRANSMISSION:SHIFT PATTERN INDICATOR
19880761988-06-02. Powertrain

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
CBR 2573-1 2026042026-05-05. Service bulletin. CBR - Mack Chassis - Through Shaft Bearing Retainer Breakage On Mack Carriers.
CBR 2362-3 2026042026-05-04. Service bulletin. CBR - Mack Carrier Nut Adhesive Change.
CBR-202 2024022024-03-05. Service bulletin. CBR - Automated Manual Transmission ( AMT ) Flywheel Pilot Bearing Wear On Input Shaft.
M-465-001 2023112023-12-05. Service bulletin. TSB: Mack Trucks now offer an improved HD Inter-Axle Through Shaft for the CRD 125, 150, 180, and 200 family carriers. The new HD shaft went into production on January 23rd, 2023 for 2.54 - 3.50 axle ratios and April 1st, 2023 for 3.56 - 3.98 ratios. The new HD through shaft is an upgrade over the current standard shaft and can now be used as a replacement part instead of the standard shaft. The new HD shaft has a new design to increase strength, longevity and life over the standard shaft.
KC-474-Ver52023-06-05. Service bulletin. CBR: Diagnostic Trouble Code (DTC) P215A-64, Fault Code SPN 84 FMI 19
KC-22482023-03-07. Service bulletin. Flywheel Housing Thread Repair
KC-21122022-07-05. Service bulletin. Programming Failure - Chassis With Cummins Engine And An Allison Transmission
KC-4052022-07-05. Service bulletin. Warranty Automated Manual Transmission ( AMT, I-Shift, mDrive ) Control Housing Assembly; Guidelines For Filing A Claim For Chassis Return Visit With Transmission Issues After A Repair Requiring Control Housing Removal And Reinstallation - US07 And N.
KC-7452022-07-05. Service bulletin. Automated Manual Transmission ( AMT ) I-Shift / mDRIVE - Ribbon Harness Replacement - Speed Sensor Bolts, Possible Fault Codes P1058 - 21 Or MID 130 PID 161 FMI 1
KC-6482022-06-07. Service bulletin. Mack - PTO Pump Speed Calculator