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RPMs at 70mph

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Old Feb 21, 2009 | 09:43 PM
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scootr29
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RPMs at 70mph
Can someone please tell me the RPMs at 70mph on a 2006-2009 ML with the CRD. No Bluetec.

I want to compare to my Grand Cherokee with the CRD.

Thanks
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Old Feb 22, 2009 | 03:47 AM
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About 2100 rpm @ 70 mph with Michelins (255/55 R18).

Also easy to calculate: 713 revolutions per mile taken from the tire catalog times 0.73:1 top gear in the 7G-tronic, times 3.45:1 final ratio front and rear, times 70 MPH/60 MPH.

The Grand Cherokee CRD has a .83:1 top gear in the 5-speed and might turn a little higher.
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Old Feb 22, 2009 | 08:18 AM
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Yes I see 2500rpms at 70mph.

Thanks for the info.

Scott
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