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4:11s with an auto, fuel milage?

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Old 10-18-2009, 05:07 AM
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4:11s with an auto, fuel milage?

I have been thinkin about changing my 3:55s out for something a with a little more oompph, 4:11s seem like a possibility cause my old man has a 02 HO truck with em and that thing will haul *****, in stock trim. Do any of yall have 411s with an auto? if so what kind of milage are you getting? im getting around 17-18 with mostly city driving. does anybody know the over all ratio on a 6 speed 4:11 and the ratios on a auto 3:55 and a auto 4:11?

another quick question, does anybody else with an auto have premature overdrive sensation? lol it seems like mine hits o/d before it needs to.
Old 10-18-2009, 07:49 AM
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i have a auto and 4.11. i was getting about 14-16mpg with mixed back road and highway
Old 10-18-2009, 08:39 AM
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If I stay at 60mph or less I can (if I'm mindfull) hit 20mpg-empty. With mixed about 15ish. I do feel that most of my mpg's are from my narrow hwy tires.

The od on mine allways kicks in at 30mph-and converter lockup at 40.
Old 10-18-2009, 11:19 AM
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With my NV5600 and 4:10's i average about 15-17. My boss has the NV5600 and 3.55's he gets about 18 unless he is towing his 46 foot toy hauler.
Old 10-18-2009, 01:56 PM
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I have no idea of mileage. Still got a lead foot.
You have to learn to drive using the OD off button. Keep it locked out until 40ish mph.
Old 10-18-2009, 02:06 PM
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with 285 16's the best i have seen empty driving easy was 19.26 with out correction for tire size hand calcualted
Old 10-19-2009, 02:25 AM
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I have an extra 2000 dodge with 4.10 which I am thinking of putting in my 98.5 dodge with 3.50 gears and I am running 35in tires. i figure that will bring me back to stock gearing. whats your thoughts ED

I have 275 injectors and edge ez
Old 10-20-2009, 09:25 PM
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Originally Posted by jay_d
I have been thinkin about changing my 3:55s out for something a with a little more oompph, 4:11s seem like a possibility cause my old man has a 02 HO truck with em and that thing will haul *****, in stock trim. Do any of yall have 411s with an auto? if so what kind of milage are you getting? im getting around 17-18 with mostly city driving. does anybody know the over all ratio on a 6 speed 4:11 and the ratios on a auto 3:55 and a auto 4:11?

another quick question, does anybody else with an auto have premature overdrive sensation? lol it seems like mine hits o/d before it needs to.
Send me an e-mail to CoastalDav@Bellsouth.net and I'll sent the info you requested on the ratios etc.

Dave
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