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Old 02-21-2013, 02:23 PM   #1
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3.07 Axle Ratio

Opinions on that axle ratio?

I found what I was looking for but to my surprise the build sheet says that they made a 60th anv edition without the D44.

Was hoping for a 3.73

Question is- If I don't go above 31 10.5's am I ok with the 3.07?

Thank you in advance for your feedback.

Mark

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Old 02-21-2013, 02:56 PM   #2
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So have you verified that you have 3.07's?

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Old 02-21-2013, 03:37 PM   #3
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No. I haven't purchased it yet. I just ran the build sheet off the vin.
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Old 02-21-2013, 04:15 PM   #4
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The build sheet should give you gear ratio...
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Old 02-21-2013, 04:47 PM   #5
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Depends what you want to do with it. On the highway it's fine. Dirt trails and snow covered streets, OK. Heavy rock crawling probably not.

I've got 3.07's and 31's and I'm happy. I don't do rocks though.
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Old 02-21-2013, 06:09 PM   #6
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The build sheet could be wrong too. They have been wrong before. But either way with 31's it'll be fine. With those 3.07 gears it'll be sluggish no matter what tires you have.
Are you talking about a 60th anniversary Rubicon?
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Old 02-21-2013, 06:41 PM   #7
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Also depends if its an auto or manual. But iirc, auto's came with 3.73s.
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Old 02-21-2013, 06:57 PM   #8
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I have 3.07s and 33s. With a manual 5 speed and 4L. It does fine except for mountain passes when it gets really steep. I just I have to down shift more often in that situation. But when you want to regear above 3.73s you will have to buy anew carrier. Which adds a few hundred more dollars. If you have the option I would go with a rig with 3.73s already in it, it will be cheaper in the long run!
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Old 02-21-2013, 07:03 PM   #9
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Quote:
Originally Posted by FireMike View Post
I have 3.07s and 33s. With a manual 5 speed and 4L. It does fine except for mountain passes when it gets really steep. I just I have to down shift more often in that situation. But when you want to regear above 3.73s you will have to buy anew carrier. Which adds a few hundred more dollars. If you have the option I would go with a rig with 3.73s already in it, it will be cheaper in the long run!
A few hundred more? Are you talking for the regear or for just the carrier?
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Old 02-21-2013, 07:12 PM   #10
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Just the carrier. Plus install.
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Old 02-21-2013, 07:31 PM   #11
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Quote:
Originally Posted by FireMike View Post
Just the carrier. Plus install.
I bought my carrier online for around $55.
The install does get pricey though.
My guy will do front and rear, labor only, for $500.
Cheapest other than him that I found was $800 for front and rear for labor only. About $1200 for parts and install.
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Old 02-21-2013, 07:53 PM   #12
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I think it depends on what you want to do, and where you live. I have the 5 speed and run the 3:07 gears with the 31's. I easily run 60 mph with the cruise on. Off roading in the sand and light mud is no problem.

Knowing the gear ratio is why I went with the 31s.

Rock climbing ? Here in Florida......that only happens when I hit the curb at the late night drive through!!
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Old 02-21-2013, 10:22 PM   #13
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I have the 5speed and 3.07 with 31's and have no problems on the road or doing 80+ on the interstate. Occasionally I do have to downshift on a hill.
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Old 02-21-2013, 10:28 PM   #14
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I have a 32RH tranny, 3.07 gears, 4.0L and 33x12.5 and i do just fine off road, i have to use 4lo quite often on alot of areas but i get by, i do ok on the high way

but i can tell that i am maxed out as far as tire size or i would not be able to do the speed limit, i would not mind some 3.73's at all
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Old 02-22-2013, 10:52 AM   #15
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It is an auto.
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Old 02-22-2013, 05:37 PM   #16
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Then I must have a weak motor my tj is sucking hind tit it works hard at 70mph in 5th
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Old 03-01-2013, 06:36 AM   #17
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gas mileage and 3.07 vs 373's

If you have stock tires and don't off road will the 3.07 be acceptable? Is there any appreciative difference in gas mileage if it is a 4.0 and a 32R auto tranny

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