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joelyn's avatar
joelyn
Explorer
Nov 05, 2014

RPM's when towing uphill?

have a 2012 dodge ram 1500 with a Hemi 5.7 engine crew cab 2x4.
just got a small 21 ft TT weighing loaded 3900 lbs.
going up a 6 or 7 % grade in Nv. was doing 55 to 60 MPH and the RPM's were between 3500 and 4000 RPM's.

Am I at a safe range? is 4000 RPM's in the danger zone for my engine or am I ok all around?
thanks
  • Grandpere's avatar
    Grandpere
    Explorer
    Nov 05, 2014
    Use peak horsepower RPMs (5600) rating for going as fast as you can, and use peak torque RPMs (4400) for best fuel economy but slower speed. So I would say that you are safe at running 4000 RPMs with your engine, according to Chrysler's own specs.
  • joelyn's avatar
    joelyn
    Explorer
    Nov 05, 2014
    Mandalay Parr wrote:
    Where is the red line?



    hummmmmm, not sure, don't remember seeing a red line. will have to check tomorrow and let u know.
    thanks

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