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Old 02-27-2012, 01:09 AM   #1
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35" tires 3.25" lift. No rear gear??

I have a 2007 Unlimited with an automatic transmission.
I'm only going to be driving my Jeep around town and about 15 miles Monday-Friday on the interstate. Where I live it is very flat. Can I live with a 35"/3.25" setup without regearing? Please help so I can know to cancel my order or not.

Thanks!

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Old 02-27-2012, 01:17 AM   #2
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Yes on a JK(U) 35's fit with 2.5in of lift so your good there.. as to 35's and your stock gearing can you run it that way? Yes. Will it be a total dog and you may even come to hate it? Yes.. Just out of curriosity what is your stock gearing? 3.21's or 3.73's?

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Old 02-27-2012, 01:23 AM   #3
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No really sure. Don't know anyway to look it up right now. It's a 2007 Unlimited X. 4 door.
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Old 02-27-2012, 01:27 AM   #4
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the two easiest ways to do it is.. One take your vin number to a chrysler/jeep dealership and have them print up your build sheet or email chrysler/jeep here http://www.jeep.com/wccsapp/universal/J/index.jsp and request they send you a build sheet.... The other way is if you go look at your rear axle it's either to the right or left of your diff cover there will be a little plate that should say it.. Or it could even be engraved on your diff cover.. Someone will have to verify which it is on the JK for me
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Old 02-27-2012, 01:32 AM   #5
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I should also add and im sorry this sliped my mind.. With over 3in of lift on a JKU your rear (front?) drive shaft will need to be replaced as it's not long enough to handle anything over the 3in of lift..


Sorry for not being completey sure on some things tonight for ya pacer.. 230am and im just tired.. Others later this morning I hope will see this thread and verify the axle gear ratio identification thing and which shaft needs to be replaced after 3in of lift
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Old 02-27-2012, 01:34 AM   #6
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Ok. All the information I receive would be greatly appreciated. I don't want to put anymore money into it than I already have. I appreciate all of your responses.
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Old 02-27-2012, 01:59 AM   #7
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Can you get away with not re-gearing? Sure, but it will put a lot of strain on the drivetrain and the Jeep will be a total dog. Realistically, you should be running at least 4.56s for your type of driving.

Front shaft may or may not need to be replaced, depends on lift. Up to 3.5, the stock front is generally okay, especially if you are just commuting on the street. Rear doesn't need to be replaced.

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Old 02-27-2012, 05:37 AM   #8
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I have 4.10 gears with a 4in lift and 35s.
I did not re gear but I changed my drive shafts.
Drives fine to me but I bet it could drive alot better with some new gears.
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Old 02-27-2012, 07:32 AM   #9
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Definitely find out what gears you have. Some 2007s came with 4.10s, and I'm not talking about Rubis. If you are one of those lucky few, the 35s will definitely be more liveable.

As for the lift, I'm assuming you are referring to the Rough Country 3.25"? Just some food for thought, but I still hear more bad than good about the RC lifts. Their springs just seem to sag over time much worse than any other manufacturer out there. I know their kit is cheap (something like $399 or so), but I am inclined to suggest that you go with a different manufacturer.
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Old 02-27-2012, 07:59 AM   #10
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I ordered a Pro Comp 2.5'' lift kit but everyone kept telling me I would need a pitman arm, which cost an additional $100+. I then switched a 3.25'' RC lift, which comes with every thing. Their kit is not really that cheap, as I went with the "2007 - 2012 Jeep JK Wrangler 3.5'' Series II Suspension" which cost me over $500. This lift kit comes with a pitman arm.

As for the gears, I am not sure what I am running. I will find that out this morning and let you know.

Thanks!
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Old 02-27-2012, 08:13 AM   #11
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My first thought when reading this "Can I live with a 35"/3.25" setup without regearing? Please help so I can know to cancel my order or not." was actually, cancel it anyway! You're not ready to be ordering gears!!! But then I'm pretty sure you are asking about the order of the lift. If that's what you're asking about cancelling then I'd say you should be find with a 3.5" lift. But if you meant that you ordered gears, CANCEL. More research and more questions should definitely be asked before pulling the trigger on a set of gears. And for god's sake make sure you get someone to put those gears in for you. Someone that knows what they are doing. There's a process that needs to happen and I'm pretty sure by your questions that you're not ready for that.
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Old 02-27-2012, 08:15 AM   #12
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"Rear" gear?
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Old 02-27-2012, 08:19 AM   #13
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Quote:
Originally Posted by ESP
"Rear" gear?
I'm guessing he meant regear.
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Old 02-27-2012, 08:20 AM   #14
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No, I did not buy new gears. My question was do I HAVE to regear with a 35"/3.25" setup, because I don't want to spend anymore money.
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Old 02-27-2012, 08:26 AM   #15
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Quote:
Originally Posted by GoPacers
No, I did not buy new gears. My question was do I HAVE to regear with a 35"/3.25" setup, because I don't want to spend anymore money.
When it comes down to it, only you can make that decision. Some folks can live with it better than others.
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Old 02-27-2012, 08:34 AM   #16
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Someone is selling a used set of 35x17's local to me on CL for cheap.
Got me thinking "why don't people try them first before dropping $2k on new tires". ??

I will be going with 35's and I do still have plans on regearing come spring.

Just an idea
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Old 02-27-2012, 12:41 PM   #17
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Thanks for your help guys. My gear ratio is 4.10. Thoughts now?
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Old 02-27-2012, 12:49 PM   #18
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Quote:
Originally Posted by GoPacers
Thanks for your help guys. My gear ratio is 4.10. Thoughts now?
On an 07 with an auto you will be wishing you had more power. If you regear, a 5.38 will put you back to just above stock power
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Old 02-27-2012, 01:08 PM   #19
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Thanks for your help guys. My gear ratio is 4.10. Thoughts now?
I agree that you still may want to regear. But with 4.10s, it will definitely be a bit more bearable than with 3.73s. Only one way to find out!
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Old 02-27-2012, 01:26 PM   #20
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You'll be OK with 4.10 gears, but

You will have to correct your speedo and you'll never be able to use you O/D--allways in 3rd gear on the hiways !!

If you stay in towns--your OK !

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Old 02-27-2012, 01:31 PM   #21
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Hard to imagine being stuck in 3rd gear for your cruising hwy speed.
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Old 02-27-2012, 01:32 PM   #22
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Not sure exactly what overdrive is. You gotta understand, I don't really know much other than how to drive my Jeep, so thats why I'm coming to you guys.

Since regearing isnt really necessary, what could I buy that would help the longevity of my Jeep? I've read places where a new spare tire mount would help because the 35'' tire is too much weight?
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Old 02-27-2012, 01:34 PM   #23
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My Jeep is an automatic. It's not a manual.
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Old 02-27-2012, 01:48 PM   #24
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Quote:
Originally Posted by GoPacers View Post
Not sure exactly what overdrive is. You gotta understand, I don't really know much other than how to drive my Jeep, so thats why I'm coming to you guys.

Since regearing isnt really necessary, what could I buy that would help the longevity of my Jeep? I've read places where a new spare tire mount would help because the 35'' tire is too much weight?
You'll need a new spare tire mount, or the weight of the 35 will trash the welds in your tailgate. You can go with something like this:

OR-FAB Part 85208BB - Swing Away Tire Carrier by Or-Fab for Jeep

Or you can get a bumper that comes with a tire carrier...but those cost even more than the OR-FAB, above.

I should add...your goal of putting 35's on your Jeep with a 3"+ lift, without spending any more $$, are pretty unrealistic. You'd be much better off with 33" tires and a 2.5" lift (which will still give you the option of running 35's sometime down the road, should you choose to).

I'd advise you to look at some of the Jeeps here running that kinda combo. They look awesome.

Up to you.
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Old 02-27-2012, 01:50 PM   #25
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I'd advise you to look at some of the Jeeps here running that kinda combo. They look awesome.

Up to you.
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Old 02-27-2012, 01:56 PM   #26
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Quote:
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Yes, I did have guys like ESP and MTH in mind.

Some good examples in here, as well:

Show Us Your 33's!
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Old 02-27-2012, 02:37 PM   #27
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If you have a pre-2012 auto transmission that is not a Rubicon, then it's very likely you have 3.73 gears. Since it's a 2007, there's a slim chance you've got 4.10s. Are you sure it's 4.10s?

If so, that's good, though I still think you'll be pretty disappointed with the performance of a pre-2012 auto trans on 35s without a regear. But ultimately, that's a matter of taste and budget. Should be livable with modest commuting.

Speaking of budget though, talk of doing over 3" of lift with 35s with a tight budget and not spending any more money always makes me nervous. At that height and with those tires, you're starting to get into drive shaft issues, ball joint issues, potential deep desire for a regear, etc. You should be alright for a little while, but this is reasonably likely to lead to more expenses down the road. Just sayin'.
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Old 02-27-2012, 05:23 PM   #28
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i drove my 08 jku with 35's and a 3.5 lift for almost a year with stock 3.73 .very bad on hills and with the whole family in the jeep just regeared to 4.88 much more power and fun to drive
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Old 02-27-2012, 05:30 PM   #29
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Well I've got a 4.10 gear ratio with a slightly smaller lift (3.25") with no hills in sight. It's nothing but flat ground in Indy. I should be just fine, then.
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Old 02-27-2012, 05:31 PM   #30
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Do you have an automatic or manual, War?

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