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Service bulletins for the 2018 Mack Granite

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.

300 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

Only bulletins with component: Transmission and driveline are shown. Show all

Bulletins, newest first
KC-2152022-01-06. Service bulletin. POWER TRAIN; PARKING BRAKE. Mack Chassis - Granite (GR) Models Equipped With An Allison Transmission And Split Box PTO - "Release Parking Brake" Message Present In Instrument Cluster When Parking Brake Is Released - Model Year 2018 And Newer
KC-1652021-12-07. Service bulletin. POWER TRAIN. Model Year 2018 - Equipped With An Automated Manual Transmission ( AMT-F ) ( I-Shift, mDRIVE ) - Noisy When The Vehicle Is Stationary Shifting From Neutral To Drive Or Reverse
KC-1452021-12-07. Service bulletin. POWER TRAIN. Automated Manual Transmission (AMT) (Spigot Bearing) Input Shaft Repair Kit And Shim Kit, Part Number Information, Reference Guide - US07 And Newer Emissions, Model Year 2008 And Newer
KC-1192021-12-07. Service bulletin. POWER TRAIN. Mack Chassis - Equipped With An Automated Manual Transmission (mDrive, AMT) AMT-C, AMT-D Or AMT-F - Transmission Oil Specifications - Model Years 2010 To 2020
KC-1242021-11-05. Service bulletin. POWER TRAIN. Automated Manual Transmission Gearbox Will Not Shift To High Range After Gearbox Repair; MID 130 PSID 24 FMI 1, P1072-92 Unintentional Disengagement Of High Range - US07 And Newer Emissions, Model Year 2008 And Newer
KC-1152021-11-05. Service bulletin. POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION:INTERNAL:GEARS. Automated Manual Transmission ( AMT ) ( I-Shift, mDRIVE ) Equipped Chassis, OBD13 And Newer - Light Turbo Surge ( Chuff ) During Skip Shifting
FSB 491-0322021-04-05. Service bulletin. EQUIPMENT; POWER TRAIN. Transmission Oil Cooler Hose, Replacement
FSB 491-0322020-12-01. Service bulletin. EQUIPMENT; POWER TRAIN; EQUIPMENT ADAPTIVE/MOBILITY. Transmission Oil Cooler Hose, Replacement
K742535352020-02-24. Service bulletin. POWER TRAIN; PARKING BRAKE. Mack Chassis - Granite (GR) Models Equipped With An Allison Transmission And Split Box PTO - "Release Parking Brake" Message Present In Instrument Cluster When Parking Brake Is Released - Model Year 2018 And Newer
K705703422019-12-09. Service bulletin. POWER TRAIN. Mack Chassis - Equipped With An Allison Transmission: Enable 6th Speed - All Emissions, All Model Years
K413925142019-10-28. Service bulletin. POWER TRAIN:DRIVELINE:DRIVESHAFT. Mack Chassis - Drive Axle Brake Chamber Rubbing Frame Or Brake Drum - Vehicles Built Between 7 July 2014 And 23 August 2019
K938233002019-02-19. Service bulletin. POWER TRAIN. Mack Chassis - Pinnacle (CHU,CXU), Granite (GU) With Mack Engine ONLY - Power Take Off ( PTO ) Engine Speed Control Inoperative; Engine Speed Does Not Ramp When PTO Is Activated - Model Year 2014 And Newer
K938233002018-12-17. Service bulletin. POWER TRAIN; ENGINE. Mack Chassis - Pinnacle (CHU,CXU,PI), Anthem (AN), Granite (GU,GR) With Mack Engine ONLY - Power Take Off ( PTO ) Engine Speed Control Inoperative; Engine Speed Does Not Ramp When PTO Is Activated - Model Year 2007 And Newer
K252291682018-12-17. Service bulletin. POWER TRAIN. Automated Manual Transmission Gearbox Will Not Shift To High Range After Gearbox Repair; MID 130 PSID 24 FMI 1, P1072-92 Unintentional Disengagement Of High Range - US07 And Newer Emissions, Model Year 2008 And Newer
K911211662018-10-15. Service bulletin. ENGINE; POWER TRAIN:MANUAL TRANSMISSION. Mack Chassis - Automated Manual Transmission Model F (AMT-F, mDrive) - Possible Infrequent Hiccup/Stumble During Steady Engine/Vehicle Speed; Diagnostic Trouble Code P1074-92 Logging, Appears As Inactive - Common Model Years 2018 And 2019
K486615442018-03-12. Service bulletin. POWER TRAIN:MANUAL TRANSMISSION; STEERING:GEAR BOX:SHAFT SECTOR. Chassis Equipped With An AMT-F (mDrive) - Idle Drive Function Activates When Vehicle Is Reversing/Backing Up At Low Speed; Information And Repair - Build Date Beginning Of Production 2017 To February 2018

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.