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#1
Posted
06-22-2005, 06:30 PM
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Deeper OD, 5600 or 47RE?
It seems I turn just a few RPM's less than my dad's 6 spd Cummins with my auto Ram.
Which tranny has a steeper ratio in OD?
__________________
'06 3500 Mega W/mods '01 2500 QC W/mods 
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#2
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The 6spd is .74 to 1 and the Auto is .69 to 1 in O/D so thats why you see a difference.
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#3
Posted
06-23-2005, 11:08 PM
in reply to DWitcher's post starting "The 6spd is .74 to 1 and the Auto is..."
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Interesting.....
So does the 6 spd version actually get any better mileage than the auto or is that a myth with today's hi tech lockup converters and such?
__________________
'06 3500 Mega W/mods '01 2500 QC W/mods
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#4
Posted
06-23-2005, 11:19 PM
in reply to RJF's Red Cummins's post starting "Interesting.....
So does the 6 spd..."
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You won't see any better fuel mileage with a Dually reguardless of what tranny you have compaired to a single wheel due to the rolling resistance.
Everything I've read states the manual will give a better return with fuel mileage because of the drivetrain coupling loss through the torque converter before converter lockup. The clutch will always be a 1:1 through all gears in the manual trans.
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#5
Posted
06-24-2005, 03:46 PM
in reply to RJF's Red Cummins's post starting "Interesting.....
So does the 6 spd..."
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like said before torque converter slippage
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#6
Posted
06-24-2005, 06:07 PM
in reply to Hintz's post starting "like said before torque converter..."
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Quote:
__________________
"My Give A Damn Is Busted" '05 Dodge CTD SLT/ Big Horn QC LB 4x4 48RE 3.73 Some people are like Slinkies ... not really good for anything, but they still bring a smile to your face when you push them down a flight of stairs.
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#7
Posted
06-24-2005, 06:22 PM
in reply to Super Trucker's post starting "Vs. rolling resistance of the Dually...."
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I'll bet the Dually is worse due to aerodynamics and weight compaired to a SRW and more so a short box.
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