I have a 2012 freightliner coronado with a dd15 motor. Ive noticed in the low gears 1-5, the truck has enormous power. It will really get up and go, but in the high gears 6-10, upon switching gears I hear a light roaring noise or like something is spinning and the power (speed) of the truck lags a bit. If I gradually (slowly) press the accelerator it doesn't make that noise and everything is smooth. It makes going on to the highway from the entrance ramp a real hassle. Please help me!!
Eaton fuller 10 speed light roar and slight loss of power
Discussion in 'Ask An Owner Operator' started by Jihye, Feb 21, 2020.
-
-
Trucking Jobs in 30 seconds
Every month 400 people find a job with the help of TruckersReport.
-
When you experience the problem is the tachometer rpm climbing but the speed is lagging?
If so it could be a slipping clutch.
If the tachometer and speedometer are proportionate to each other it could be a blown boot on the charge air system.
Do you have a boost gauge? -
Hulld Thanks this.
-
If the RPM is rising and is not proportional to speed rise then you definitely have a slipping clutch.
Is there any free play in the clutch pedal before it starts to engage? -
Hulld Thanks this.
-
-
Hulld Thanks this.
-
Also most of the big trucks use ceramic friction material and they don’t really smell a whole lot when slipped.
With that being said the old organic friction material had a horrific smell when they slipped.
Also If you have the friction material glazed they will slip but still have free place.
My last one I could slip it at will in high gear if I choose to and it still had free play.
I ran it that way for three months before I got to where I had the available time so I
could change itLast edited: Feb 22, 2020
Trucking Jobs in 30 seconds
Every month 400 people find a job with the help of TruckersReport.