Zeuz

No the starter hasn't been replaced at all ..my driver just called and said he got no dash lights ,still no turn signal or radio no cruise control...but if he turns head lights off the rpm and speedo gauge lights up...the only thing done to that truck in the last 2 weeks is it wouldn't go over 55 and mechanic eliminated the protection mode on it couldn't find what was wrong or just being lazy...

No the starter hasn't been replaced at all ..my driver just called and said he got no dash lights ,still no turn signal or radio no cruise control...but if he turns head lights off the rpm and speedo gauge lights up...the only thing done to that truck in the last 2 weeks is it wouldn't go over 55 and mechanic eliminated the protection mode on it couldn't find what was wrong or just being lazy...

Hey ,I'm having trouble with my 2011 mack ,the turn signals won't work,radio,cb,and the dash lights don't turn on.but if I turn my headlights off the center of my dash lights light up..the control center with the amps,miles etc come on and off..the other day my batteries went dead I replaced them and put new alternator and everything worked fine ,but I'm having this problem...anyone know what can it be...my driver says all fuses are good.thanks

No ,he hardly ever test drives just the computer.....i priced that tube at mack it was 1900.00..i have no issues getting it but i wanted to double check first...thanks for the info..i just got the truck a few weeks ago for my lowboy..the gauges will work the quit it cuts on and off...does that have anything to do with it u think? Wiring or so

Ok im going to try that first...the mechanic wants me to replace the tube with the EGR control .but i wanted to see if it could be something else...thank you

I have a 2006 CHN 613 it won't go over 63 mph at 1600 rpm that's all it will do it has a 18 spped.... I took it to a mechanic he said it's reading 

Egr- mass flow-open ( flash code 5-9). Before he goes guessing and replacing parts ..i was wondering is anyone has had this code or knows anything about it...

Have a 2011 mack with a MP8. The ac was cooling while u was moving on the highway.but idling it won't cool blows hot..it just went out today doesn't cool at all..the engine fan comes on at 205 degrees but i don't hear it coming on while idle..i wired the high pressure switch straight but u hear it click at the fan but it won't engage .it's a cool logic cooling fan ..wondering if it's the ac or the cooling fan or both..thanks

15 hours ago, Onyx610 said:

I wonder why they didn’t just put a new trans in? 🤷🏼

They wanted 10,700 for a reman transmission and 2,200 for the labor..plus at the other extra...at the dealer..I'm in Florida a place in Georgia that works on transmission only quoted me 15,000 and they would come and get the truck I had to pay for fuel only 

15 minutes ago, Onyx610 said:

Good luck hope it all works out for you, post some pics when it’s done. 

I will 

10 minutes ago, Onyx610 said:

That makes a lot of sense, those transmissions are shit. What kind of work is involved in changing over to a manual trans?

I'm having a guy to do it ..he told me $2,500 for transmission with pedal,and everything needed around 4,000 to ,4,500 ...so I'm thinking I will have around 6,000 with everything..installed ready to go...I average 750 miles a day pulling 88,000 so I need it to last...

22 hours ago, Onyx610 said:

Let us know what you end up doing, I am curious. There’s just soooo many variables with your issue. 

I hooked up a loaded trailer today and it ran 55 plus mph..got to 11 th gear wouldn't got into 12 th.with the pedal all the way down the transmission started to slip a little so I'm figuring the transmission by slipping it's not letting get up in speed...Mack quoted me $32,000  for a new MDrive 12 speed,or 11,500 for reman plus 2400 labor..I'm going to pull the transmission out and put a 10 speed manual.getting away from aotomatic..too much money..

8 minutes ago, Onyx610 said:

Who knows what that “programming” is on the truck. That’s probably your issue. 

Thank you

8 minutes ago, Onyx610 said:

Who “cleared and reprogrammed” the EECU?

The same shop who deleted it programmed it.....this shop deleted the truck a year ago and it did the same thing no power at 50mph but the programmed it a got it right......now a year later doing the same thing but the can't get going ..they tried everything...so I took it to another place and they telling me they don't see anything wrong with the program..so I don't know

The mechanic put the scanner on truck and transmission..there's no codes .he hooked up a empty trailer to the semi and pulled it 80 plus miles .I brought the truck home hooked it up to a loaded trailer and get 50 mph and won't go no more...anyone know what I can do..thanks

I'm getting 34 pounds of boost in 11 th gear at 1400 rpm..but won't go past 50 to 55 mph .....someone told me it could be the torque converter..it's a MDrive transmission 12 speed that's in truck..at this point I don't know

33 minutes ago, fjh said:

Bro if your Truck is deleted we can't help Much! Could be anything!

I know..we drove it today and can get to 11th gear at 1300 rpm 56 mph and won't go anymore...                                    Thanks 

I Have a 2016 Mack with a MDrive.

The truck recently wouldnt start..then when it started it wouldn't idle it would shut off..I had the computer taken off I took it and got cleared.and programmed .I test drove it and it won't ride no more then 50 miles loaded..the mechanic said it was the crankcase filter housing ..I spent 900 dollars and replaced it..still doing the se thing doesn't have power to go over 50..it just stays there with the pedal to the floor..I don't know what else to do..it does have the def eliminated I bought truck like that..anyone knows what I should do..bobtail it will run 70 plus but with a trailer falls on it's face ..need help thank you

11 hours ago, 67RModel said:

I know a lead mechanic at a mostly Mack fleet runnning a lot of MDrives and a lot of the failures they were seeing were from from one of the wiring harnesses (I think on the left side of the unit) were getting corroded somehow and causing all sorts of weird symptoms. This was several years back now but I know they had they exact same thing happen on a few of their trucks. It could possibly be a technical service bulletin by now. These are rebadged Volvo I Shift transmissions with different software programming to match the programming and characteristics of the Mack MP engines. Maybe check some of the Volvo forums (if they have one) to see if there is any information there? 

Thanks for the info .. appreciate it

5 hours ago, 67RModel said:

Most likely so it would save a an extra thimble full of fuel every week and so they could say it gets up to 3% better fuel economy than the previous iteration.

I have driven these and the Detroit DT12 transmission and from a drivability standpoint they really are less than desirable. Yes they make going down the road a little "easier" since you don't physically have to go up and down through the gears but once you get into any type of tight quarters that requires a lot of slow speed backing or maneuvering they absolutely suck. I've had several instances where getting a 53' trailer into a super congested terminal that was designed for 32' trailers the air actuated clutch was working so much the low air alarm came on. I personally have no use for these Volvo I shift (I mean Mack M drive) transmissions. Plus you guys say they have poor longevity.....Its amazing to me what people will give up for convenience.

My MDrive still doing the same slipping in and out on highway cruising..it does it a little more with 90,000 or more..it's still going ..but I'm taking it in to Mack next week..I talked to them of course they said it can be anything..

2 hours ago, Joey Mack said:

since it's deleted,,,  well....  who know's..  you playing with fire by having it deleted...  jojo

I know I bought it deleted....the truck had a strap get stuck around the drive shaft on highway and locked the wheels on highway when I bought it..it snatched all the wires and every airline hose from the carriage bearing on back to tail lights ..I replaced everything..but when it was replaced the grade gripper came up on the dash then it disappeared after awhile..the only thing I noticed they did was the put a airline hose from the wet tank to the other tank which I seen other mack's don't have..so both tanks fill up at the same time....also there's a air valve on the side of the first rear axle on driver's side that has the grade gripper valve ..there's a air line hose missing on that valve ..the truck runs and everything works ..but they couldn't figure out what airline hose went there...do you think that could be the problem?

Well since I last posted about my issue with the MDrive slipping in and out of gear .I still can't find anyone here in south Florida who works on them..the Mack dealer will buy the DEF is deleted..it still does the same thing I been having it on the road every day..it sometimes takes long to shift and now when u press the brakes it won't go into neutral it stays in drive unless u press like hell..hope 

12 hours ago, Vmac3 said:

It may also be the clutch actuator that is acting up. I hope you have warranty on this transmission. More failures to come.

V

I hope it ain't much of a issue ..I'm waiting for the truck to get back from the road..and I sure ain't got no warranty ..the driver said it hasn't done it all day ..thanks 

I seen that tank under the driver's side I'm going to also double check the lines and clean it...thanks

I'm going to check it ..I know sometimes it won't go in gear when ur stoped or rev up .I took the negative off the batteries and it was fine but still does it ..and the slipping in and out of gear I definate will check  for that module thanks