Mack engine brake/ power leash

Discussion in 'Mack Forum' started by DrtyDiesel, Sep 23, 2012.

  1. larry2903

    larry2903 Medium Load Member

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    Oct 18, 2009
    On the trails
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    I've got a 2011 Mack with the MP8, power leash works very good. I run western states quite a bit, no problems holding loads close to gross on steep grades. I don't have anything against Volvo's, But the MP8 does have a different head, engine brake, and yes ecm programing is different.
     

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    Last edited: May 26, 2013
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  2. jonboy29

    jonboy29 Light Load Member

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    Jul 9, 2010
    Home Sweet Home... SW Ont.
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    I just started driving a mack MP8 with a power leash with a 13 speed, and I like it. Lots of power, and forget about using it empty...... it will almost lock the drives.
    I have hi and low, so that helps over the single stage.
    I was pulling quad axle trailers with only Michigan weight, so around 100,000 gross. Nothing serious, and no steep hills, but the performance was good.
    This week I get to try Tn hills and only 80,000 gross. Can't wait!
     
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  3. Mack427

    Mack427 Medium Load Member

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    Jan 22, 2009
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    camelback is the same suspension since the 40's and 50's the M ride is nothing but Volvo's T ride. That being said its not a bad suspension its actually the best part on a VHD
     
  4. Pumpkin Oval Head

    Pumpkin Oval Head Road Train Member

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    Jun 24, 2010
    Scranton PA
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    I just started driving a day cab Mack Pinnacle this week, pulling tankers. It is one year old. My boss does not use the engine brake, but I think there are times it would be helpful to use it. Can you tell me which buttons activate the engine brake? I tried using the two buttons on the right side of the double row of buttons on the dash, but could not tell if I had activated the engine brake. There are engine symbols on the two buttons, but not much hint which one is the ON/Off button. Thanks.
     
  5. larry2903

    larry2903 Medium Load Member

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    Oct 18, 2009
    On the trails
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    Hey Pumpkin, sorry haven't gotten back to ya sooner, not on here much lately. My Dog has two switches for the engine brake, the one with the engine is a two way switch, up = on, down = off. Next switch is a three way, up is latch = engine brake on as soon as I take my foot off of gas pedal or shut the cruise off, middle is auto, when speed gets to four mph over set speed engine brake comes on.Bottom is a set switch to set the power leash speed. Hope this helps if you haven't already figured it out.
     
  6. Ezeebig

    Ezeebig Bobtail Member

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    Nov 24, 2019
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    Powerleash message stays on screen while engine brake is turned on. It's a 2018 mack gu713 mp7 with allison auto.
     
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