2025 Mack Anthem (an) TSBs
66 Technical Service Bulletins across 13 categories
Categories
Engine
17 bulletinsParker engine-mounted hydraulic pump service bulletin.
Mack Trucks has determined that certain AN model trucks equipped with an MP8 Turbo Compound (TC) engine may experience...
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TC Double Idler Gear failure due to incorrect bearing preload. TC units within this population are suspected to be affected, which could result in failure and potential engine damage. For the affected vehicle population, please follow the instructions provided below to remove the TC unit, replace the double idler gear with a new one, and reinstall the TC unit.
Mack Trucks Equipped With A Cummins Engine - Engine Preheat Icon Does Not Illuminate In The Instrument Cluster (IC)...
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During Engine Pre-heat (Intake Air Heater) Operation - Vehicles With 2018Instrument Cluster Update, Model Year2018 And Newer
Vehicles affected by this issue will show coolant runoff on the front rights side of the engine.
CBR - 13 Liter Engines ONLY - Engine Coolant Pump Housing Leak; Coolant Found Around The Oil Cooler Duct Cover Or In...
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Between The Coolant Pump Housing And Oil Cooler Housing.
SC - Mack Trucks has determined that certain AN model trucks equipped with an MP8 Turbo Compound (TC) engine may...
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experience TC Double Idler Gear failure due to incorrect bearing preload.
Inactive Code P25AE00 Being Generated After A Hard Pull And A Momentary Drop In Engine Oil Pressure (Low Oil Pressure)...
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(Possible Related Codes - SPN4811 , SPN 100 , PID 100)
Vehicles may present with oil leak coming from the clutch/flywheel housing and observation of burned clutch smell or clutch slipping.
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These symptoms can be mistaken as a crankshaft rear main seal leak, when the actual cause is the crankshaft adaptor O-ring.
CBR - 11L Engine block compatibility and Backward Conversion Parts Requirements
CBR - 13L Engine - Rear Main Oil Seal Leak Model Year 2025
CBR - 13L Engine - Rear Main Oil Seal Leak - Model Year 2025
CBR: Automated Manual Transmission (AMT) Model D or F (mDrive and I-Shift, AMT-D, AMT-F) - Transmission Oil Leakage From...
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Transmission Input Shaft Seal Or Output Shaft Seal - US10 And Newer Emissions, Common Model Years 2010 And Newer
CBR: 11L, 13L, And 16L Engine Oil Analysis Specifications - US10 And Newer Emissions
CBR: Vehicles built with an 11 liter engine may experience a complaint of excessive fuel in the oil.
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It is possible that the source of the fuel is the rear fuel galley plug in the cylinder head. A new and improved fuel galley plug has been developed to resolve this issue.
CBR: Turbo Compound 2nd Generation - EGR And / Or DPF Diagnostic Trouble Codes (DTC), Diagnostic And Repair Information.
CBR: Turbo Compound (TC) Hot Side Noise, Diagnostic Information.
CBR: Vehicles built with an 11 liter engine may experience a complaint of excessive fuel in the oil.
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It is possible that the source of the fuel is the rear fuel galley plug in the cylinder head.
Other
12 bulletinsThe purpose of this CBR is to provide steps on how to correct a customer complaint of DTC P107B86 accompanied With...
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intermittent loss of throttle.
CBR - Mack Chassis - Through Shaft Bearing Retainer Breakage On Mack Carriers.
CBR - Mack Carrier Nut Adhesive Change.
CBR - Parker F3 Hydraulic Pump Troubleshooting.
CBR - No Start Condition After Over the Air Programing.
SC - Mack Trucks has determined that certain Mack sleeper cab assemblies were possibly manufactured with an insufficient...
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number of welds across the rear flange of the upper header
CBR - To correct the MID136 SID 66 FMI 7 fault code the latest Bendix VCP file will need to downloaded.
CBR - A significant GPS reporting issue is affecting fleet operations, with trucks maintaining back-office communication...
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but failing to transmit GPS location data.
Mack Chassis - Rear Axle Overheat
CBR - One-Box SCR Weld Leaks.
CBR: To correct the MID136 SID 66 FMI 7 fault code the latest Bendix VCP fi le will need to be downloaded.
CBR: Telematics Gateway (TGW) Connect Ability Issues
Body & Paint
6 bulletinsCBR - Mack Chassis - Dash Panel Cracking at Mounting to BIW.
CBR - Mack Chassis - AN And GR Models - Door Glass Shattering.
Remote Control Central Door Lock, Programming; Key Fob Cannot Be Programmed Or Does Not Work After Programming - Model...
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Year 2018 And Newer
This CBR solution provides detailed instructions for diagnosing and addressing window glass shattering issues, including...
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replacement specifications, interference checks, fastener verification, and reinforcement tab adjustments to ensure proper installation and functionality.
CBR: Mack Chassis - Day Cab Glass Breakage
CBR - Mack Chassis - Day Cab Glass Breakage
Electrical
6 bulletinsSC - Mack Trucks has determined that a select group of trucks were built with an AHI Module fuel pressure sensor which...
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does not meet our specifications.
CBR - Mack Temperature Sensor Troubleshooting Guide
CBR - When an OTA (Over-The-Air) job starts to program the VECU blocks the starter relay out, if the job ends in a...
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Critical failure, the vehicle will remain in Safe State.
Mack DEF Level (UQLS) Sensor Troubleshooting Guide - US17+OBD16 Emissions and Newer
SC - Mack Trucks has determined that certain Anthem and Granite model trucks have a mislabeled Electronic Fuse & Relay...
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Center (EFRC) Cover.
Mack Trucks has determined that a select group of trucks were built with an AHI Module fuel pressure sensor which does...
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not meet our specifications.
Fuel System
5 bulletinsSC - Electric Exhaust Heater Control Unit Update
Cummins Exhaust Aftertreatment System (EATS) catalysts may experience cracking, which may be attributed to excessive...
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vertical vibration in the exhaust stack. To mitigate this issue, a modification to the exhaust stack length is required.
If oil dilution is suspected refer to the applicable CBR solution below: CBR-659Mack Chassis - Oil Diluted With Fuel;...
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Fuel In Oil, Diagnostic Information - All Emissions, All Model Years
Mack Trucks has determined that certain Mack sleeper cab assemblies were possibly manufactured with an insufficient...
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number of welds across the rear flange of the upper header. The reduced number of welds could lower the designed cab integrity.
CBR: Overhead Wear Overview - Model Year2018 To Current (Common Rail Fuel System ONLY)
Transmission
5 bulletinsIf the vehicle door is open and the truck is in neutral, a popup message may appear on the Driver Information Display...
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(DID) instructing the operator to shift into neutral. If this message appears while the vehicle is already in neutral, the Instrument Cluster (IC)requires a software update.
CBR - Mack Chassis - Timing Gear Plate Repair
CBR: Mack chassis with an mDRIVE transmission, there have been reports of complete shift assemblies and TECUs being...
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replaced due to technicians being unable to pinpoint the source of the air leak.
CBR: ZF/TRW Steering Gear Side Cover Leak
CBR: Equipped With An Automated Manual Transmission Model D or F ( AMT-D, AMT-F, mDrive) Missing X1 Value In VDA And...
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Default Settings Guidelines, ParameterP1AOB; Fault Code P1052-54, Error 40,Or Error 18 Encountered During Clutch Or Tran.
Pre-Delivery & Maintenance
4 bulletinsCBR - Wiper Linkage Inspection.
Service Campaign: Interaxle Driveline Torque
Service Campaign: Interaxle Driveline Torque
CBR - Accelerator Pedal: Inspection Instructions
Infotainment
4 bulletinsCBR: Drivers Information Display (DID) Inoperative/Goes Blank During Vehicle Operation
CBR: Drivers Information Display (DID)Inoperative After Cluster Replacement And Programming
CBR - Drivers Information Display (DID) Inoperative/Goes Blank During Vehicle Operation
CBR - Drivers Information Display (DID) Inoperative After Cluster Replacement And Programming
Suspension
2 bulletinsCBR - Z Spring Bracket Wear.
Frame lean can be caused by several seemingly isolated possibilities.
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The two most common are suspension and frame assembly issues.
Tires & Wheels
2 bulletinsThe purpose of this CBR is outline the interim software solution for PR(4) andAN(4).
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Note that this document is subject to updates and currently covers Service Pack updates to B2_T2_1.2.
CBR: Vehicles Equipped With A Lift Axle - Wheel Speed Fault Code SPN 793, SPN 794 Set When Axle Is Up
Air Bags & Safety
1 bulletinSC - The vehicles seat belt tether may have been assembled with incorrect hardware.
Lighting
1 bulletinCBR: The procedure to eliminate the Mack Chassis "Air Restriction Light On" seen in the cluster is to confirm that the...
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parameter YYT is set to "Enable" with Premium Tech Tool.
Brakes
1 bulletinCBR: Mack Anthem (AN) And Pinnacle (PI) -Bendix ABS Fault SPN 807 FMI 13 Blink code 19-4