35" tires and 5.13 gears - JeepForum.com

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post #1 of 34 Old 04-09-2009, 12:10 PM Thread Starter
LovinFirstJeep
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35" tires and 5.13 gears

whats the fuel economy and speeds like on the highway/freeway? im thinkin about going this route. but i drive about 100 miles on freeway about once a month. so i was wondering how the rig would do. thanks

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post #2 of 34 Old 04-09-2009, 12:19 PM
ge2
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I've never looked at my mileage, but I have that setup, and can cruise on the freeway comfortably at 70-75 miles per hour.
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post #3 of 34 Old 04-09-2009, 12:22 PM
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Fine in an auto, not so fine with the stick.

Speed has never killed anyone - suddenly becoming stationary, that's what gets you!
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post #4 of 34 Old 04-09-2009, 12:26 PM
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I disagree. I have the 6 speed, and being able to manually control shifting points is what make this work even better.
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post #5 of 34 Old 04-09-2009, 12:27 PM
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Does this help


2009 Sahara 2dr 2.5" RC coil lift, DCl 16x8 wheels, DC FCll 285/75R16 tires, Rampage Recovery bumpers F & R
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post #6 of 34 Old 04-09-2009, 12:29 PM Thread Starter
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yeah the graph is what actaully got me thinking 5.13 but i wanted to hear some first hand feed back.
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post #7 of 34 Old 04-09-2009, 12:31 PM
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I hardly ever drive 100 miles at a time. When i do drive long distances, you can see the avg. fuel economy digits go up a pretty good bit. To be honest, i really never checked it with pen and paper. I know the meter on the dash is off because i never used a programmer. My avg meter is reading maybe 12.5 to 13 right now. I did tow a trailer the other day, so that took it down a bit. I can say one thing for certain, if your looking for good fuel economy, leave the jeeps alone. If you have driven on 35's with the 3:73, taking off and cruising on inclines is a hell of alot better with the 5"13's.

corey d
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post #8 of 34 Old 04-09-2009, 12:37 PM
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Does this help

So according to this the stock 3.73 gears are not even in the factoty range with stock tires?How f'n lame.
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post #9 of 34 Old 04-09-2009, 03:03 PM
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I have been having 35's and 5.13 gears for a long time now. I have an automatic transmission and four doors. This gear / tire combination is perfect in my opinion. I have pretty good power, can tow pretty good, take cross country trips on the interstate, cruise control works great, etc. etc. Basically, I cannot find one good reason not to run 5.13 gears with 315/70-17 tires with an automatic transmission. With my setup, I make 17 mpg. When I had the same tires and wheels but 4.10 gears, I got 12 mpg and everything sucked. When I was bone stock with my Sahara, I got 19. My performance, towing, acceleration, everything is better than stock and I only lost 2 mpg compared to running stock 18" wheels and 32" sahara street tires. My transmission even shifts better than stock. Read my numerous posts about this subject. My only regret about 5.13 gears is not doing it sooner. I ran for 4,000 miles with 35's and 4.10's and the longer I had that combination, the more annoyed I got with my Jeep. I was at the point to where I figured that I may have to go with a hemi or go back to stock tires/wheels. For $1,300, regearing solved my woes and I'm not really inclined to go for a hemi anymore. My Jeep feels like this is how it should have come from the factory, because there are no negative effects. If you have a manual transmission, most people prefer 4.88's with 35's. I have never driven a manual transmission JK, so I cannot vouch for that.

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post #10 of 34 Old 04-09-2009, 03:21 PM
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I have no idea how you are getting 17 mpg. My commute doesnt involve hills and has minimal stop and go and I am only able to average 13.6-13.8 across a tank of gas. With 4.10's and 32's I was around 19-21 depending on how many trips to the mountain I made. Granted the power is much better with the 5.13's it isnt any kind of a mpg upgrade.

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post #11 of 34 Old 04-09-2009, 03:24 PM
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I'll echo GE2. Have the same setup with 5.13 and 35" on a 4 dr 6sp, and have zero complaints. Not sure why people think this setup only works on an auto.

Drove down to the Truck and Jeep show last weekend - about 45 minutes highway drive each way from where I live, and did 70-75 with the whole family, no issues. Even used the cruise control.

Mileage on that trip was about 14-15 MPG IIRC. About 2 better than I get city.

- Bill (formerly VetteDriver)
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post #12 of 34 Old 04-09-2009, 03:53 PM Thread Starter
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Thanks for the replies guys. on a side note would a 315/75 R16 look funny on a 16X7 wheel? thanks
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post #13 of 34 Old 04-09-2009, 03:55 PM
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Quote:
Originally Posted by VetteDriver View Post
Drove down to the Truck and Jeep show last weekend
Sorry to hi-jack the thread but how was the show? Any good deals? Im kicking myself for not going.

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post #14 of 34 Old 04-09-2009, 04:06 PM
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Originally Posted by JohnBarleycorn View Post
I have no idea how you are getting 17 mpg. My commute doesnt involve hills and has minimal stop and go and I am only able to average 13.6-13.8 across a tank of gas. With 4.10's and 32's I was around 19-21 depending on how many trips to the mountain I made. Granted the power is much better with the 5.13's it isnt any kind of a mpg upgrade.

With 4.10's and 32's I got 19. With 4.10's and 35's I got 12. With 5.13's and 35's I get 17. If I am unfortunate enough to have to st

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Last edited by Prot; 04-09-2009 at 04:27 PM.
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post #15 of 34 Old 04-09-2009, 04:09 PM
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Originally Posted by JohnBarleycorn View Post
Sorry to hi-jack the thread but how was the show? Any good deals? Im kicking myself for not going.
They had some nice rigs, but it was a really small show. Great deals on rims (steelies for $50 a piece), and I could have gotten a Powerplant for $1200. But other than that, it was like walking through a catalog and getting 10% off.

If you had a stock rig, this was a great way to get started. But with only major parts/suppliers, for me it was rig watching and then a burger and just a drive home. The little guy (my 2 year old) loved it though - needed to "drive" every vehicle there.

- Bill (formerly VetteDriver)
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