4.10 vs 4.56
10-29-2015, 10:36 AM
#2
JK Newbie
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I have a 2014 JKUR with a manual and 4.10's, I even have 35" STT's but not the pro, I wish I had 4.56 on the highway, but I live in a hilly area.
I'm not sure of the overdrive ratio differences between the auto and manual..
I'm not sure of the overdrive ratio differences between the auto and manual..
10-29-2015, 11:16 AM
#3
JK Freak
'15 JKUR auto here with 35's and 4.10's - I've been happy with the combo. No issues on the highways, passing, gear hunting, etc... Have a friend with a '15 2dr auto, 35's, on 3.73 - and its actually also quite satisfactory (on and offroad). Both in Michigan where highways are typically flat though.
If you know 35's are what you're sticking with, I'd go 4.10; I don't think I'd consider 4.56, unless perhaps you think you might want to go 37's later on.
If you know 35's are what you're sticking with, I'd go 4.10; I don't think I'd consider 4.56, unless perhaps you think you might want to go 37's later on.
10-29-2015, 11:58 AM
#4
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'15 JKUR auto here with 35's and 4.10's - I've been happy with the combo. No issues on the highways, passing, gear hunting, etc... Have a friend with a '15 2dr auto, 35's, on 3.73 - and its actually also quite satisfactory (on and offroad). Both in Michigan where highways are typically flat though. If you know 35's are what you're sticking with, I'd go 4.10; I don't think I'd consider 4.56, unless perhaps you think you might want to go 37's later on.
Never going bigger then 35's
10-29-2015, 01:06 PM
#7
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Personally, I would go 4:88s. in fact I just went 5:13s in anticipation of 37s on a 14 JKUR auto and I love the way it runs. Night and day difference from 4:10s in an auto. I never saw overdrive with 4:10s and 35s........
Last edited by SHOELESS; 10-29-2015 at 06:46 PM.
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11-18-2015, 08:33 PM
#8
Hell I've got 4.56 on my '13 auto sport with 33's (285 70 17's) and I wouldn't want anything different, especially if I were considering bigger tires. Love the grunt with these gears
11-19-2015, 03:28 AM
#9
JK Enthusiast
Here is a handy calculator.. That will give you info on rpm and speed, based on gears and transmission.. Allows you to do side by side comparison
http://www.grimmjeeper.com/gears.html
11-19-2015, 07:27 AM
#10
I have 4.56 gears with 33's. 2014 manual... I love it. I am going up to 35's or 37's if these tires ever wear out though. 
I will say that gear ratio is great with 33's, i'm at about 2600-2700 rpm's running 65-70
I will say that gear ratio is great with 33's, i'm at about 2600-2700 rpm's running 65-70