bulldogger

Wpg., Manitoba.

Ours is a 2013 505 with the 46's as well with 36000kms on it now. And yes, it only happens under load, You really can't notice it with an empty trailer. Is there an easy way to test the injectors or do I have to convince them to do this in a leap of faith? Thanks. Bull

Ride height was checked and different settings were tried with no improvement.

Dealer refuses to troubleshoot it anymore. Says all Macks are that way, just deal with it. Truck is still on warranty.

Thanks for all the responses guys. Depress the clutch with no change in the throttle position and the vibration disappears. To my knowledge they have not tried removing the axles.

Suspension and drivelines have been checked by dealer. They even re-balanced some driveshafts. Don't think they went into the injectors. Driveline was 2" out where? Weird thing is, we are looking at trading off a second used truck on another 2014 Mack that is in stock on dealer's lot. We test drove it, looking for same vibration and it was there even on the brand new unit. So we thought maybe the dealer's claims of it being normal are true, except now we are re-thinking the purchase. Not sure what our next step should be.

Have a 2013 Mack pulling tandem gravel end dump that has a vibration that concerns me a little. More noticeable under load and only happens in 11th and 12th between 1400 and 1800rpm. Dealership has looked at it several times and seems to have no cure. Dash is beginning to shake a little more now with extra miles and am wondering if anyone else has come across this. Dealer now claims that this is normal for all Macks with Volvo engines and we should just accept it. Anyone? Thanks. First time poster. Bull