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Hello:

I'm about to regear from 3.21 to 4.56 and am wondering what kind of rpm's I would sit at doing 65MPH in 6th gear. I'm trying to find a happy compromise between highway and offroad. I have 33 x 12.5 x R17LT Cooper Discoverer STT
tires.

2013 Wrangler Unlimited Sport 3.8 liter v6
6 speed manual
Next Gen Dana 30 front axle
Dama 44 HD rear with non-slip rear differential

I'm hoping 4:56's will work and not make me start off in 2nd gear on the street and wish I had a 7th gear on the highway.
 

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Yes, I meant 3.6 liter motor. According to the chart, I will sit around 2500 and still have a good gear ratio if I choose to upgrade to 35's down the road..


It appears the 3.6 motor labors if it is below 3300 rpm's on even a slight hill, and starts to lose speed until you downshift and get that tach up to 3300-3500 to accelerate again.



Thanks
 

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Yes, I meant 3.6 liter motor. According to the chart, I will sit around 2500 and still have a good gear ratio if I choose to upgrade to 35's down the road..


It appears the 3.6 motor labors if it is below 3300 rpm's on even a slight hill, and starts to lose speed until you downshift and get that tach up to 3300-3500 to accelerate again.



Thanks
I can't speak to 33's but when I upgraded to 4:56 in my '13 2-door 6-speed with measured 30.5" tires it made 1st into creeper and 2nd perfect for taking off on the street, which is exactly what I was aiming for. The couple times I've had it on the highway 70 mph is right at 2800 rpm. I find anywhere in the 2000-3000 range to have good acceleration.
 

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I have 321` gears and 33's and it's a turd on the freeway, lol auto though no OD to shut off either, I think 410's would make pull 33's pretty good.
 

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You probably will find yourself wanting to start out in 2nd with 4.56s. I have 33s and 4.10s and I couldn't be happier.

I see you don't have a Rubi so you don't have the 4.1 transfer case. So you might want the lower gears for slow off road work, but for highway with the 33s, 4.1 is an excellent ratio because the Pentastar gets into serious torque at about 2,100 RPM and that is right at 60 MPH. I live at 5,000 ft and can pull grades in 6th if they are not too steep. On flat ground it is not struggling in 6th. And first is definitely useable in town. Drive a Rubi before you decide.
 
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