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RPM's at 70mph?

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Old 07-06-2016, 10:56 AM
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Default RPM's at 70mph?

Good afternoon,
My question is what are your RPM's at highway speed for all you 3:73 guys? I ordered my 16' Rubicon automatic and was very tempted to add the 4:10 option. Well I'm really glad I didn't pull the trigger because my RPMs are at 2500 at 70 miles per hour and it feels like my foot is "in it". My wife said the same thing when she drove it.

Thanks!
Old 07-06-2016, 11:07 AM
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Wow! That's higher than I would have expected, but when I look it up with 4LO's calculator it comes out to 2427. If you had 4.10s it would be 2668!!
Old 07-06-2016, 11:09 AM
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It'll be good after I increase tire size but until then, not so much
Old 07-06-2016, 12:22 PM
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Default 70 mph

I think I usually end up right around 2350. 80 is a big difference and puts me around 2500 to 2600. I have 3.73's and stock wheels and tires.
Old 07-07-2016, 09:21 AM
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Around 2300 with 33's and 3:73. Auto.
Old 07-07-2016, 09:33 AM
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Yea definitely going up on tire size assp. Thanks for the feedback
Old 07-07-2016, 10:39 AM
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My auto 2016 JKU Rubicon 4.1 dif, stock tires is doing 2550 rpm at 70 mph....I don't like that...but I understand is normal.
Old 07-07-2016, 02:20 PM
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At 70, I'm at 3K. Of course, I'm running 35s and 4.88s.
Old 07-07-2016, 02:23 PM
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Originally Posted by ShutterBug
At 70, I'm at 3K. Of course, I'm running 35s and 4.88s.
At 70, I'm at 2300... but I'm running 35s, 4.88s... oh, and a 6L80E with a second overdrive of 0.67:1
Old 07-07-2016, 04:04 PM
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2015 Willy's Unlimited manual 3.73s stock rims and tires 2250 rpm this morning at 70.


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