Medium and Heavy Trucks

Have truck repair questions? Ask an Expert

Connect one-on-one with {0} who will answer your question

Related Medium and Heavy Trucks Questions
Clutch issues. Its all stock oem. 2017 mack pinnacle cxu 613
Sure! I was also trying to know if i can put another brand clutch… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,765 satisfied customers
I have a 2014 Mack CXU and when the truck is run on the
I have a 2014 Mack CXU and when the truck is run on the highway, it displays a message that the oil temperature is too high and needs to cool down. It had previous codes that led me to replace the oil… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,765 satisfied customers
I have 2013 mack cxu. It's in derate 5mph i've been having
mike I have 2013 mack cxu. It's in derate 5mph i've been having emissions problems. Replaced nox sensors dpf filter dosing valve and few other things. The truck is 250 miles from my hometown. I tried … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,765 satisfied customers
Speedometer quits working and the truck loses power. 2013
speedometer quits working and the truck loses power. 2013 mack mp8 … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,765 satisfied customers
My 2012 mack cxutransmission going in 1 an 2 an going
My 2012 mack cxu*****transmission going in 1 an 2 an going straight to 12 gear its saying sum bout lock up clutch pressure indicator an it saying transmission shift console primary … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,765 satisfied customers
I have a 2007 Mack MR truck Keep hearing a bird - tweeting
I have a 2007 Mack MR truck Keep hearing a bird - tweeting sound user acceleration, can't duplicate at park raising engine speed. Check exhaust side of turbo no play spins good no hitting walls, no sm… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,765 satisfied customers
2001 Mack ch 613 427. Engine fan will not come on when
2001 Mack ch 613 427. Engine fan will not come on when engine gets hot on a long hard pull. actuator is working, has constant power to it. When I unplug it is engages but not full power, I can actuall… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
214 satisfied customers
2009 Mack 613.....All of a sudden speedometer quit and rpm
2009 Mack 613.....All of a sudden speedometer quit and rpm limited to about 1600..Replaced speed sensor at rear of trans and adjusted one full turn out...ran ohms check on sensor 164 ohms..Inspected h… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,765 satisfied customers
Speedometer quicks working and engine rev limits to 1400
speedometer quicks working and engine rev limits to 1400 rpm … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,765 satisfied customers
I have a 2005 mack chn 613 it cant get over 50 mph, it just
i have a 2005 mack chn 613 it cant get over 50 mph, it just has no power in the upper end. It pulls fine in lower gears but when i gt up to 6th high and low it just wont go up a hill on the highway, i… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,765 satisfied customers
I have a Mack 2011 with mp8 it shakes badly when it reach
I have a Mack 2011 with mp8 it shakes badly when it reach above 50 I have change the fuel filter housing and still the same I have to gear down from 10 to 9 speed because the vibration is really bad what can be the possible problwm … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,765 satisfied customers
Have Mp8 engine with delted Def. It starts and runs well but
Have Mp8 engine with delted Def. It starts and runs well but boggs down every 10 seconds on start up. … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,765 satisfied customers
My name es Nestor. Mack/Cxn613/2006/5G0724. I need the vecu
hi JA: Hi. How can I help? Customer: my name es Nestor JA: What's the make/model/year of your truck? Engine type? Customer: Mack/Cxn613/2006/5G0724 JA: Are you fixing your truck yourself? What have yo… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,765 satisfied customers
Having problems with a 2014 mack MP8. Truck seems to buck or
Having problems with a 2014 mack MP8. Truck seems to buck or shudder around 1400 rpm. Seems to be more of an issue when cool in the morning. Truck is starting fine. Injectors were updated with stainle… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,765 satisfied customers
1993 mack truck ch-613 with a 400 hp .timing go to [email protected] full
1993 mack truck ch-613 with a 400 hp .timing go to [email protected] full load and i being told it needs to be 16… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
5,115 satisfied customers
Have a 2012 Mack with a mp7 had a code for fan clutch had it
Have a 2012 Mack with a mp7 had a code for fan clutch had it in a shop they verified I replaced the fan clutch no codes now but still have no manifold pressure are boost pressure … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
I just bought a 2015 Mack CXU-613 heavy haul truck. During
I just bought a 2015 Mack CXU-613 heavy haul truck. During the first week of operation (2,700 highway miles), the oil temperature has always stayed around 240-244F, while oil pressure gauge shows 45-5… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
5,115 satisfied customers
Hi, we have a mack truck ch 613 e7 engine with the following
Hi, we have a mack truck ch 613 e7 engine with the following problem. While driving the truck after an hour the electrical mal function light goes on and the engine loses power suddenly. we just turn … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
5,115 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here.

DianeDallas, TX

< Previous | Next >

Meet the Experts:

Daniel Wilson

Daniel Wilson

6,062 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

5,353 satisfied customers

I am ASE Master Truck Certified.

Wayne

Wayne

Journeyman

5,115 satisfied customers

worked on, Gmc, Macks, Freight liner,Mercedes Benz,,Ford, sterling

Jeremy

Jeremy

Certified Truck/Bus Technician

2,756 satisfied customers

ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, Network Engineer specializing in CAN faults, Aftertertreatment, and vehicle communications

Curtis B.

Curtis B.

Technician

1,947 satisfied customers

Technician turned service manager on multiple lines of trucks and engines, used in industry.

cumminsdr

cumminsdr

Mechanic

1,886 satisfied customers

All types of Cummins applications

Chris (aka-Moose)

Chris (aka-Moose)

Technician

641 satisfied customers

24 years of experience diagnosing & repairing

< Previous | Next >

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x