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Old 05-18-2011, 09:33 PM   #1
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What Are Your RPM's?

At 55 to 60 mph with the o/d off (like the owners manual says), I am showing any where from 2500 to 2800 rpm on a flat. How about you all?
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Old 05-18-2011, 10:02 PM   #2
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My 6.0L/4.10, loaded at 14,700lbs, at 60 MPH in 3rd gear will turn 2,700 RPM. I can save about 500 RPM and at least 10 degrees in tranny temp if conditions allow me to tow in "D" (overdrive).

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Old 05-18-2011, 11:32 PM   #3
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Our liberty in "tow/haul" at 60mph is about 2800. Sometimes I can take it out of that mode and drop it down around 2400.
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Old 05-19-2011, 05:20 AM   #4
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With a gross of 21,800 an towing at 55 mph my rpm is 1500. I got 12.8 mpg on my last 250 mile trip. This is consistent with other trips (hand calculated).
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Old 05-19-2011, 06:46 AM   #5
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At 60 I usually run about 1800 and I got 12.5 last trip to Hershey.
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Old 05-19-2011, 06:50 AM   #6
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Quote:
Originally Posted by Zombied View Post
Our liberty in "tow/haul" at 60mph is about 2800. Sometimes I can take it out of that mode and drop it down around 2400.
Interesting....., I use Tow/Haul mode when towing with my GM TV, but when in use it only raises my shift point RPM's, not my high end positioned drive gear RPM (3rd or "D"). The end RPM remains the same Tow/Haul on or off when positioned in 3rd or "D".

Bob
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Old 05-19-2011, 08:26 AM   #7
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2250 at 60 mph but I have to switch the tow haul off for a min till it shifts into OD then reengage tow haul.
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Old 06-21-2011, 09:04 PM   #8
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At 60 mph in 3rd gear, rpm's about 2200. Seldom will it hold overdrive for long, but when it does, then about 1800 rpm at 60 mph. With this GM, tow-haul mode only raises the rpm shift points.
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Old 06-21-2011, 09:23 PM   #9
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At 65 MPH, in 6th gear with tow/haul engaged the truck is at 1700 RPM
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Old 06-21-2011, 09:44 PM   #10
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1750 RPM = 64MPH = 11.44 MPG Towing 9,500 lb 5th.
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