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  #1  
Old October 7th, 2008, 12:22 AM
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Dana Hammersley
1997 Arles Blue #162
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Regearing

What kind of RPM's is everyone with the 4.11 gears at 70 mph in the 97 automatics? I am currently running 285-75-16 at 70 mph I get around 23-2400 rpms with factory 3.54 gears. Should I go withthe 4.11 or the 3.80 that Great Basin has?
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  #2  
Old October 7th, 2008, 07:49 AM
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Paul Davis
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I run around 24 or 2500. That is with 35's and a supercharger.
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  #3  
Old October 7th, 2008, 08:52 AM
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Jim C.
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Plug in tire size, gear choices, transmission and transfer case ratios and Bob's yer uncle....

http://www.grimmjeeper.com/gears.html
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  #4  
Old October 9th, 2008, 05:21 PM
Monkeyboy

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Or go out on a limb and do the math....

2,300 / 3.54 * 4.11 = 2,670

Wait...indicated 70mph or real 70mph?

Either way, your rpm at given speed - in a given gear - should be ~ 17% higher with the 4.11's
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  #5  
Old October 9th, 2008, 06:56 PM
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Todd Kendrick
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I am real surprised that MonkeyBoy has time to do long math right now. It was great to meet you in Moab MonkeyBoy! I am ready for the 15th.........
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  #6  
Old October 9th, 2008, 07:02 PM
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You'll notice that I'm still at the office Wheeeee!!!!!

Good to see you Todd,

KAA
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