NHTSA vehicle safety data

2007 Mack CHN Recalls & Complaints

The 2007 Mack CHN has 12 NHTSA recall campaigns and 1 owner complaint on file as of November 3, 2026. Recall repairs are usually free at an authorized Mack dealer.

NHTSA recall and complaint data for the 2007 Mack CHN. Recall data is refreshed daily from NHTSA.

Pre-purchase inspection checklist → Reliability & 5-year cost forecast →

2007 Mack CHN owner complaints

Owners have filed 1 complaint with NHTSA about the 2007 Mack CHN, describing incidents dated December 20, 2010.

Most-cited components

Engine 1 complaint

Newest complaints

ODI #10382644 · Filed February 14, 2011
2007 MACK TRUCK CHN 613, 427 ASET AC ENGINE FAILURE DUE TO OIL PUMP DRIVE GEAR SPINNING LOOSE ON AUXILIARY SHAFT. WHEN THE VEHICLE BEGAN TRAVELING DOWN HILL, THE OIL PUMP DRIVE GEAR FAILED CAUSING AN IMMEDIATE LOSS OF OIL PRESSURE. THE ENGINE BECAME A CRITICAL INSTRUMENT IN CONTROLLING THE VEHICLE'S…

Read the full complaint

SAF HOLLAND SIMPLEX/ARM PIVOT BOLT

NHTSA #07V497000 · Trailer Hitches — Fifth Wheel Assembly · NHTSA notice

Reported October 23, 2007 · MACK TRUCKS, INC

Potentially affected: 950 vehicles

Mack campaign SC0331 · Owners notified January 28, 2008 · Vehicles built January 9, 2006 – June 29, 2007 (per NHTSA)

Defect description

ON CERTAIN TRUCKS EQUIPPED WITH A SAF HOLLAND SIMPLEX FIFTH WHEEL, THE LEVER ARM PIVOT BOLT MAY HAVE BEEN OVER TIGHTENED. AN OVER TIGHTENED PIVOT BOLT CAN DISTORT THE PIVOT BOLT SPACER SLEEVE, WHICH MAY PREVENT THE FIFTH WHEEL LATCH JAW FROM CLOSING AND LATCHING SECURELY AROUND THE TRAILER KING PIN.

Safety consequence

THERE IS A POSSIBILITY THAT THE PIVOT BOLT CAN BECOME LOOSE WITHOUT THE DRIVER'S KNOWLEDGE. WHEN THIS OCCURS, THE DRIVER COULD DRIVE AWAY AND THE TRAILER COULD BECOME DISENGAGED, INCREASING THE RISK OF A CRASH.

Manufacturer remedy

DEALERS WILL REPLACE THE PIVOT BOLT AND SLEEVE WITH A HEX HEAD SHOULDER BOLT AND WASHER FREE OF CHARGE. THE RECALL BEGAN ON JANUARY 28, 2008. OWNERS MAY CONTACT MACK TRUCKS AT 1-800-528-6586.

Notes

MACK TRUCKS RECALL NO. SC0331.CUSTOMERS MAY ALSO CONTACT THE NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION'S VEHICLE SAFETY HOTLINE AT 1-888-327-4236 (TTY 1-800-424-9153), OR GO TO HTTP://WWW.SAFERCAR.GOV.

AC FUEL INJECTION LINES/ASET

NHTSA #07V401000 · Fuel System, Diesel · NHTSA notice

Reported September 5, 2007 · MACK TRUCKS, INC

Potentially affected: 35,649 vehicles

Mack campaign SC0324 · Owners notified September 11, 2007 · Vehicles built January 1, 2002 – January 31, 2007 (per NHTSA)

Defect description

ON CERTAIN TRUCKS EQUIPPED WITH ASET AC MODEL ENGINES, THE ENGINE AS CONFIGURED WITH AN EXTERNAL EXHAUST GAS RECIRCULATION SYSTEM MAKES SERVICING THE FUEL INJECTION LINES DIFFICULT WHEN USING TRADITIONAL TOOLS. THEREFORE, IT IS POSSIBLE FOR FUEL LEAKS TO DEVELOP WHEN REMOVING AND INSTALLING THE FUEL INJECTION LINES.

Safety consequence

A LEAK IN THE FUEL INJECTION LINE MAY SPRAY FUEL ON THE HOT SURFACES OF THE EXHAUST GAS RECIRCULATION SYSTEM, WHICH COULD RESULT IN AN ENGINE FIRE.

Manufacturer remedy

DEALERS WILL REPLACE THE FUEL INJECTION LINES FREE OF CHARGE. NOTE: THIS RECALL SUPERSEDES A PREVIOUS CAMPAIGN CONDUCTED IN 2006 (PLEASE SEE 06V392). THE RECALL BEGAN ON SEPTEMBER 11, 2007, WITH SUBSEQUENT MAILINGS EVERY SIX WEEKS UNTIL APRIL 2008. OWNERS MAY CONTACT MACK AT 800-528-6586.

Notes

MACK RECALL NO. SC0324.CUSTOMERS MAY ALSO CONTACT THE NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION'S VEHICLE SAFETY HOTLINE AT 1-888-327-4236 (TTY 1-800-424-9153), OR GO TO HTTP://WWW.SAFERCAR.GOV.

SR-7 SPRING BRAKE MODULATING VALVE/BENDIX

NHTSA #07V360000 · Parking Brake · NHTSA notice

Reported August 15, 2007 · MACK TRUCKS, INC

Potentially affected: 18,805 vehicles

Mack campaign SC0335 · Owners notified January 10, 2008 · Vehicles built November 4, 2005 – May 1, 2007 (per NHTSA)

Defect description

ON CERTAIN TRUCKS EQUIPPED WITH BENDIX SR-7 SPRING BRAKE MODULATING VALVES, THE INTERNAL RUBBER CHECK VALVE MAY LEAK CAUSING A DELAY IN THE APPLICATION OF THE SPRING BRAKES TO PARK THE VEHICLE AFTER THE OPERATOR PULLS THE DASH VALVE BUTTON.

Safety consequence

THIS COULD DELAY OR FAILURE IN APPLYING THE PARKING BRAKES WHICH COULD RESULT IN A VEHICLE ROLL AWAY, INCREASING THE RISK OF A CRASH.

Manufacturer remedy

MACK IS WORKING WITH BENDIX TO REPAIR THESE VEHICLES (PLEASE SEE 07E037). BENDIX WILL INSTALL A CHECK VALVE REPAIR KIT FOR THE AFFECTED SR-7 SPRING BRAKE MODULATING VALVE FREE OF CHARGE. THE RECALL BEGAN ON JANUARY 10, 2008. OWNERS MAY CONTACT BENDIX AT 1-440-329-9000 OR MACK AT 1-800-528-6586.

Notes

MACK RECALL NO. SC0335 (SC0328).CUSTOMERS MAY CONTACT THE NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION'S VEHICLE SAFETY HOTLINE AT 1-888-327-4236 (TTY: 1-800-424-9153); OR GO TO HTTP://WWW.SAFERCAR.GOV.

PARKER SINGLE CHECK VALVE/BENDIX

NHTSA #07V361000 · Service Brakes, Air — Supply — Check Valve · NHTSA notice

Reported August 15, 2007 · MACK TRUCKS, INC

Potentially affected: 21,847 vehicles

Mack campaign SC0334 · Owners notified January 9, 2008 · Vehicles built January 2, 2004 – July 26, 2007 (per NHTSA)

Defect description

ON CERTAIN TRUCKS EQUIPPED WITH PARKER SINGLE CHECK VALVES (SCV) PROVIDED BY BENDIX. THE DEFECT EXISTS IN THE PARKER SCV THAT CONNECTS WITH THE SUPPLY PORT OF THE SR-7 SPRING BRAKE MODULATING VALVE. AFTER PROLONGED USE OF THE PARKER SCV, THE VALVE BODY RETAINER MAY BECOME EXCESSIVELY WORN AND EVENTUALLY BREAK APART. PIECES OF THE PARKER SCV CAN BECOME LODGED INSIDE THE SR-7 SPRING BRAKE MODULATING VALVE, POTENTIALLY CAUSING EITHER LEAKAGE OUT OF THE SR-7 VALVE OR PREVENTING AIR FROM PROPERLY EXHAUSTING FROM THE SR-7 VALVE.

Safety consequence

THIS CONDITION CAN CAUSE A DELAY IN THE APPLICATION OF THE SPRING BRAKES TO PARK THE VEHICLE AFTER THE OPERATOR PULLS THE DASH VALVE BUTTON. THESE CONDITIONS CAN OCCUR WITHOUT WARNING, LEADING TO UNINTENDED VEHICLE ROLLAWAY, BRAKE DRAG, OR IN THE CASE OF LOSS OF PRIMARY CIRCUIT, INABILITY TO MODULATE THE SPRING BRAKES.

Manufacturer remedy

MACK IS WORKING WITH BENDIX TO REPLACE THE PARKER SINGLE CHECK VALVE. THE RECALL BEGAN ON JANUARY 9, 2008. OWNERS MAY CONTACT BENDIX AT 1-440-329-9000 OR MACK AT 1-800-528-6586.

Notes

MACK RECALL NO. SC0334 (SC0327).CUSTOMERS MAY CONTACT THE NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION'S VEHICLE SAFETY HOTLINE AT 1-888-327-4236 (TTY: 1-800-424-9153); OR GO TO HTTP://WWW.SAFERCAR.GOV.

ASET AC FUEL INJECTION LINES

NHTSA #07V159000 · Fuel System, Diesel · NHTSA notice

Reported April 13, 2007 · MACK TRUCKS, INC

Potentially affected: 9,102 vehicles

Mack campaign SC0323 · Owners notified April 19, 2007 · Vehicles built October 1, 2006 – January 31, 2007 (per NHTSA)

Defect description

CERTAIN TRUCKS WERE RECALLED FOR THE INSTALLATION OF SLEEVES ON THE FUEL INJECTION LINE AS REQUIRED BY SAFETY RECALL SC0317 (NHTSA RECALL NO. 06V392). THERE IS A POSSIBILITY THAT THE NEW SLEEVES MAY CHAFE THE FUEL INJECTION LINE.

Safety consequence

THIS COULD COMPROMISE THE FUEL INJECTION LINE OVER TIME WHICH COULD POSSIBLY RESULT IN AN ENGINE FIRE.

Manufacturer remedy

DEALERS WILL REMOVE THE PROTECTIVE SLEEVES ON ALL FUEL INJECTION LINES FREE OF CHARGE. THIS RECALL BEGAN ON APRIL 19, 2007. OWNERS MAY CONTACT MACK TRUCKS AT 1-800-528-6586.

Notes

MACK TRUCKS RECALL NO.SC0323.CUSTOMERS CAN ALSO CONTACT THE NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION?S VEHICLE SAFETY HOTLINE AT 1-888-327-4236 (TTY 1-800-424-9153), OR GO TO HTTP://WWW.SAFERCAR.GOV.

AXLE HOUSING/DANA

NHTSA #07V123000 · Power Train — Axle Assembly · NHTSA notice

Reported March 21, 2007 · MACK TRUCKS, INC

Potentially affected: 51 vehicles

Mack campaign SC0322 · Owners notified April 9, 2007 · Vehicles built November 1, 2006 – January 31, 2007 (per NHTSA)

Defect description

ON CERTAIN TRUCKS, THE AXLE HOUSINGS MAY HAVE BEEN MANUFACTURED WITH STEEL THAT WAS OUT OF SPECIFICATION WHICH COULD RESULT IN A FATIGUE FAILURE OVER TIME.

Safety consequence

IF A FATIGUE FAILURE OCCURS AND IS LEFT UNATTENDED, THE AXLE MAY LOCK UP OR THE END OF THE AXLE COULD COME OFF, WHICH COULD RESULT IN A VEHICLE CRASH.

Manufacturer remedy

DEALERS WILL INSPECT AND REPLACE THE AXLES FREE OF CHARGE. THE RECALL IS EXPECTED TO BEGIN ON OR ABOUT APRIL 9, 2007. OWNERS MAY CONTACT MACK TRUCKS AT 1-800-528-6586.

Notes

MACK TRUCKS RECALL NO. SC0322.CUSTOMERS MAY CONTACT THE NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION'S VEHICLE SAFETY HOTLINE AT 1-888-327-4236 (TTY: 1-800-424-9153); OR GO TO HTTP://WWW.SAFERCAR.GOV.

STEERING WHEEL RETAINING NUT

NHTSA #07V023000 · Steering · NHTSA notice

Reported February 1, 2007 · MACK TRUCKS, INC

Potentially affected: 2,085 vehicles

Mack campaign SC0319 · Owners notified February 12, 2007 · Vehicles built October 2, 2006 – December 7, 2006 (per NHTSA)

Defect description

ON CERTAIN TRUCKS, THE NUT THAT RETAINS THE STEERING WHEEL MAY NOT HAVE BEEN INSTALLED.

Safety consequence

IF THE RETAINING NUT WAS NOT INSTALLED, THE STEERING WHEEL MAY COME OFF, WHICH COULD RESULT IN A VEHICLE CRASH.

Manufacturer remedy

DEALERS WILL REMOVE THE HORN BUTTON TO CONFIRM THAT THE RETAINING NUT WAS INSTALLED. A RETAINING NUT WILL BE ADDED IF THE NUT IS MISSING. THE RECALL BEGAN ON FEBRUARY 12, 2007. OWNERS MAY CONTACT MACK TRUCKS AT 800-866-1177.

Notes

MACK RECALL NO. SC0319.CUSTOMERS MAY ALSO CONTACT THE NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION'S VEHICLE SAFETY HOTLINE AT 1-888-327-4236 (TTY 1-800-424-9153), OR GO TO HTTP://WWW.SAFERCAR.GOV.

ASET AC FUEL INJECTION LINES

NHTSA #06V392000 · Fuel System, Diesel · NHTSA notice

Reported October 13, 2006 · MACK TRUCKS, INC

Potentially affected: 40,204 vehicles

Mack campaign SC0317 · Vehicles built January 1, 2002 – October 31, 2006 (per NHTSA)

Defect description

ON CERTAIN TRUCKS, A LEAK IN THE ASET AC FUEL INJECTION LINE MAY SPRAY FUEL ON THE EXHAUST GAS RECIRCULATION PIPES THAT CARRY HOT EXHAUST GASES .

Safety consequence

THIS COULD POTENTIALLY RESULT IN AN ENGINE FIRE.

Manufacturer remedy

MACK HAS ISSUED A STOP WORK ON THIS CAMPAIGN UNDER FURTHER NOTICE (2-22-2007). THE REMEDY DOES NOT ADEQUATELY ADDRESS THE ISSUE ON ALL VEHICLES. MACK WILL RE-RELEASE THE RECALL IN THE NEAR FUTURE. (PLEASE SEE NHTSA NO. 07V159/MACK RECALL NO. SCO323 FOR VEHICLES THAT HAVE HAD THIS REPAIR ALREADY PERFORMED.) THIS RECALL HAS BEEN SUPERSEDED (PLEASE SEE 07V401/SC0324).

Notes

MACK TRUCKS RECALL NO. SC0317.CUSTOMERS CAN ALSO CONTACT THE NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION?S VEHICLE SAFETY HOTLINE AT 1-888-327-4236 (TTY 1-800-424-9153), OR GO TO HTTP://WWW.SAFERCAR.GOV.

BRAKE CAM LUBE

NHTSA #06V367000 · Service Brakes, Air · NHTSA notice

Reported September 26, 2006 · MACK TRUCKS, INC

Potentially affected: 1,102 vehicles

Mack campaign SC0316 · Owners notified September 25, 2006 · Vehicles built May 8, 2006 – June 7, 2006 (per NHTSA)

Defect description

ON CERTAIN TRUCKS, THE BRAKE CAM TUBES ON THE STEER AND DRIVE AXLES MAY NOT HAVE BEEN GREASED.

Safety consequence

THE BRAKE CAM JOURNALS MAY CORRODE WHICH MAY LEAD TO THE BRAKES DRAGGING WHICH COULD RESULT IN A VEHICLE FIRE.

Manufacturer remedy

DEALERS WILL ADD GREASE TO THE BRAKE CAM TUBES FREE OF CHARGE. THE RECALL BEGAN ON SEPTEMBER 29, 2006. OWNERS MAY CONTACT MACK AT 1-800-866-1177.

Notes

CUSTOMERS MAY ALSO CONTACT THE NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION'S VEHICLE SAFETY HOTLINE AT 1-888-327-4236 (TTY 1-800-424-9153), OR GO TO HTTP://WWW.SAFERCAR.GOV.

FUEL TANK CROSSOVER BRACKET

NHTSA #06V290000 · Fuel System, Diesel · NHTSA notice

Reported August 3, 2006 · MACK TRUCKS, INC

Potentially affected: 342 vehicles

Mack campaign SC0311 · Owners notified August 20, 2006 · Vehicles built February 4, 2004 – April 3, 2006 (per NHTSA)

Defect description

ON CERTAIN TRUCKS, THE FUEL LINE CROSSOVER BRACKET MAY PREMATURELY FAIL AND UNEXPECTEDLY FALL TO THE ROAD. THE LOCATION AND SIZE OF THE BRACKET DRAWS A CONCERN TO THE BRACKET BEING PICKED UP AND THROWN BY THE DRIVE AXLE WHEELS.

Safety consequence

IF THE CROSSOVER BRACKET FALLS A CRASH MAY OCCUR WITHOUT PRIOR NOTICE.

Manufacturer remedy

DEALERS WILL REPLACE THE BRACKETS FREE OF CHARGE. THE RECALL BEGAN ON AUGUST 20, 2006. OWNERS MAY CONTACT MACK TRUCKS AT 1-800-528-6586.

Notes

CUSTOMERS MAY ALSO CONTACT THE NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION'S VEHICLE SAFETY HOTLINE AT 1-888-327-4236 (TTY 1-800-424-9153), OR GO TO HTTP://WWW.SAFERCAR.GOV.

LEGRIS AIR MANIFOLD

NHTSA #06V271000 · Service Brakes, Air · NHTSA notice

Reported July 26, 2006 · MACK TRUCKS, INC

Potentially affected: 7,447 vehicles

Mack campaign SC0312 · Owners notified September 27, 2006 · Vehicles built February 1, 2006 – May 15, 2006 (per NHTSA)

Defect description

ON CERTAIN TRUCKS EQUIPPED WITH A LEGRIS AIR MANIFOLD, THE BRASS PUSH-TO-CONNECT CARTRIDGE MAY UNEXPECTEDLY SEPARATE FROM THE PLASTIC HOUSING.

Safety consequence

IF THE PUSH-TO-CONNECT CARTRIDGE THAT SUPPLIES THE AIR TO THE PARK BRAKE CHAMBERS WERE TO SEPARATE, THEN THE BRAKES COULD UNEXPECTEDLY APPLY INCREASING THE RISK OF A CRASH.

Manufacturer remedy

DEALERS WILL REPLACE THE AIR MANIFOLD FREE OF CHARGE. THE RECALL BEGAN ON SEPTEMBER 27, 2006. OWNERS MAY CONTACT MACK TRUCKS AT 1-800-528-6586.

Notes

MACK RECALL NO. SC0312.CUSTOMERS MAY ALSO CONTACT THE NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION'S VEHICLE SAFETY HOTLINE AT 1-888-327-4236 (TTY 1-800-424-9153), OR GO TO HTTP://WWW.SAFERCAR.GOV.

SPRING BRAKE MODULATING VALVES/BENDIX

NHTSA #06V232000 · Parking Brake — Conventional — Air · NHTSA notice

Reported June 28, 2006 · MACK TRUCKS, INC

Potentially affected: 2,587 vehicles

Mack campaign SC0336 · Owners notified August 14, 2006 · Vehicles built April 5, 2006 – June 1, 2006 (per NHTSA)

Defect description

ON CERTAIN TRUCKS EQUIPPED WITH SR-7 BENDIX BRAKE VALVES, THE CHECK VALVE INSIDE THE VALVE CAVITY MAY NOT PROPERLY SET, CAUSING INTERNAL AIR LEAKAGE. IF THE CHECK VALVE DOES NOT PROPERLY SEAT, THE RESULTING LEAKAGE CAN CAUSE A DELAY IN THE APPLICATION OF THE SPRING BRAKES TO PARK THE VEHICLE AFTER OPERATOR PULLS THE DASH VALVE BUTTON.

Safety consequence

THE DELAYED PARKING BRAKE APPLICATION CAN OCCUR WITHOUT WARNING, LEADING TO UNINTENDED VEHICLE ROLLAWAY INCREASING THE RISK OF A CRASH.

Manufacturer remedy

DEALERS WILL INSPECT THE VALVES AND REPLACE IT FREE OF CHARGE. THE RECALL BEGAN ON AUGUST 14, 2006. OWNERS MAY CONTACT MACK TRUCKS AT 1-800-528-6586.

Notes

MACK TRUCKS RECALL NO. SC0336 (SC0313).CUSTOMERS CAN ALSO CONTACT THE NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION'S VEHICLE SAFETY HOTLINE AT 1-888-327-4236 (TTY 1-800-424-9153), OR GO TO HTTP://WWW.SAFERCAR.GOV.

try.vin has no NCAP crash-test rating on file for the 2007 Mack CHN. NHTSA rates some vehicles by body style — pickups by cab, vans by roof height — so check nhtsa.gov/ratings.

1 owner complaint has been filed with NHTSA for the 2007 Mack CHN.

Engine and Engine Cooling

ODI #10382644

Incident: December 20, 2010 · Filed: February 14, 2011

2007 MACK TRUCK CHN 613, 427 ASET AC ENGINE FAILURE DUE TO OIL PUMP DRIVE GEAR SPINNING LOOSE ON AUXILIARY SHAFT. WHEN THE VEHICLE BEGAN TRAVELING DOWN HILL, THE OIL PUMP DRIVE GEAR FAILED CAUSING AN IMMEDIATE LOSS OF OIL PRESSURE. THE ENGINE BECAME A CRITICAL INSTRUMENT IN CONTROLLING THE VEHICLE'S DOWN HILL SPEED PARTICULARLY THE ENGINE BRAKE FEATURE AKA THE "JAKE BRAKE". THE ENGINE BRAKE USES ENGINE OIL FLOW TO OPERATE. SINCE THERE WAS NO MORE OIL FLOW, THE ENGINE BRAKE WAS RENDERED UNUSABLE. AT THIS POINT, THE CHOICE WAS TO CONTINUE DOWN HILL AND RELY SOLELY ON THE VEHICLE BRAKES TO CONTROL THE VEHICLE SPEED, OR CONTINUE TO USE THE ENGINE WITHOUT THE ADDED BRAKING POWER OF THE ENGINE BRAKE KNOWING THAT THE ENGINE WOULD BE DESTROYED. THE DRIVER CHOSE TO DESTROY THE ENGINE AND NOT RISK HIS LIFE OR THE LIVES OF OTHERS. THE DEALER REFUSED TO REPAIR THE VEHICLE UNDER WARRANTY BECAUSE THE EECM INDICATED THE ENGINE'S MAXIMUM ALLOWED SPEED WAS EXCEEDED. FURTHER INVESTIGATION REVEALED THE PROBLEM IS INHERENT TO ALL ASET ENGINES BECAUSE THE OIL PUMP GEAR HELIX WAS CHANGED FOR THE NEW DESIGN ENGINE. THE AUXILIARY SHAFT DIRECTION OF ROTATION WAS REVERSED AND THE DIRECTION OF THRUST ON THE DRIVE GEAR FORCES THE DRIVE GEAR AWAY FROM THE REAR BEARING JOURNAL WHICH IT IS NESTED AGAINST. OLDER ENGINE DESIGN HAD THE DIRECTION OF THRUST TOWARD THE BEARING JOURNAL WHICH HELD THE GEAR IN PLACE. ANY CONDITION, (LIKE AN ENGINE OVERSPEED) THAT WOULD INCREASE OIL PRESSURE COULD DISLODGE THE GEAR. ACCORDING TO THE DEALER, AN ENGINE OVERSPEED CONDITION CAN ONLY OCCUR WHILE GOING DOWN HILL AND USING THE ENGINE TO CONTROL VEHICLE SPEED. IF THE HILL WOULD HAVE BEEN HIGHER, THE ENGINE MAY NOT HAVE BEEN ABLE TO CONTINUE TO SLOW THE VEHICLE AND A CRASH WOULD MOST LIKELY HAVE OCCURRED. THIS HAPPENED IN SOUTHEAST LOUISIANA WHERE HIGH HILLS ARE NON EXISTENT. HAD THIS HAPPENED IN A MOUNTAINOUS AREA, IT COULD HAVE BEEN DISASTROUS. MACK TRUCKS REFUSES TO DISCUSS THIS ANY FURTHER. *TR

Other Mack CHN model years

Check your 2007 Mack CHN VIN

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