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-   -   Gears!!! (http://www.wranglerforum.com/f274/gears-266209.html)

Chx beach 79 08-29-2013 11:28 AM

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So I am waiting for my new gears to be installed (it is on the lift now). I am going from a 3.21 to a 5.13. I am running 37's on a 2013 JKU automatic... How much will I notice? What are others experiences with regearing? Any advice? How much difference did you notice with regearing?


Attachment 292114

spieg 08-29-2013 11:42 AM

I'm interested to get your impressions of the setup. :popcorn:

I'm leaning more toward 4.56 or 4.88 at most when I jump to 37's mainly because I put quite a few highway miles on my rig.

Chx beach 79 08-29-2013 11:51 AM

Quote:

Originally Posted by spieg (Post 4134164)
I'm interested to get your impressions of the setup. :popcorn:

I'm leaning more toward 4.56 or 4.88 at most when I jump to 37's mainly because I put quite a few highway miles on my rig.

I'm no expert but from my research online and with the mopar techs at my jeep dealership. A 5.13 and 37's would be similar to a 4.10 with stock tires... Running a 4.88 with 37's would be similar to running a 3.73 with stock tires... Running a 4.56 with 37's would be similar to running a 3.21 with stock tires... I hope that helps. This is how they explained it to me.

A 5.13 and 37's will put me at 2700 rpm's at 70 mph. I do very little driving over 55 mph, that's why I went with the 5.13

l2abbit 08-29-2013 12:07 PM

Yeah that's pretty much the way I've been told also. I will be going 456 or 488 with my 35's

CrazyT 08-29-2013 01:01 PM

Did you have 37s on before the regear? If so, it's going to be a huge improvement. You'll drive more like stock. The extra weight of the wheels and tires are still going to be there, but the transmission will be able to shift to maintain in the power band, not the "screaming high RPMs to lugging the engine" shifting you had.

I put 4.56 in my '12 auto with 35' and absolutely love it. It's a fun to drive vehicle again.

Chx beach 79 08-29-2013 01:05 PM

Quote:

Originally Posted by CrazyT (Post 4134436)
Did you have 37s on before the regear? If so, it's going to be a huge improvement. You'll drive more like stock. The extra weight of the wheels and tires are still going to be there, but the transmission will be able to shift to maintain in the power band, not the "screaming high RPMs to lugging the engine" shifting you had.

I put 4.56 in my '12 auto with 35' and absolutely love it. It's a fun to drive vehicle again.

Yes I have been driving the last couple of weeks with the 37's... It is a dog with the 3.21!!!

HillbillyJeeper 08-29-2013 01:08 PM

Will be an enormous if your running 3:21's on 37 now. Be like a different jeep.

Chx beach 79 08-29-2013 01:12 PM

Quote:

Originally Posted by HillbillyJeeper (Post 4134462)
Will be an enormous if your running 3:21's on 37 now. Be like a different jeep.

I can't wait! I am just sitting by the phone waiting for the call to go and pick her up... It should be anytime now!!!

Gunner 08-29-2013 01:17 PM

I've been leaning towards the 5.13's and 37's just because I crawl a lot. And if I decide to go bigger I won't have to regear.

PJM86 08-29-2013 01:21 PM

How about the 4.11 with 35s? Will I notice a huge difference from the 32s that were on it?

Chx beach 79 08-29-2013 01:26 PM

Quote:

Originally Posted by PJM86 (Post 4134504)
How about the 4.11 with 35s? Will I notice a huge difference from the 32s that were on it?

You will definitely notice a difference.

Moonrider 08-29-2013 03:05 PM

Could you guys tell me how much should i expect paying for new gear 4:56 or 4:88 from 2013 auto 3:21 on 35". I'm fine with current set up, but if most people say it will be a big difference then i would consider it once i have a budget.

BB1857 08-29-2013 03:16 PM

Ordering my gears today...going from 3.21 to 4.56 on my 2012 JK with 35s...was bouncing between 4.56 and 4.88 and decided 4.56 would be best because we do a lot of highway driving...cant wait!

Chx beach 79 08-29-2013 03:19 PM

Quote:

Originally Posted by Moonrider (Post 4134838)
Could you guys tell me how much should i expect paying for new gear 4:56 or 4:88 from 2013 auto 3:21 on 35". I'm fine with current set up, but if most people say it will be a big difference then i would consider it once i have a budget.

I'll be out around $1600 after it is all over with but you could probably find better deals around... I have heard of people paying $1200-1300.

Gunner 08-29-2013 03:23 PM

Quote:

Originally Posted by Moonrider (Post 4134838)
Could you guys tell me how much should i expect paying for new gear 4:56 or 4:88 from 2013 auto 3:21 on 35". I'm fine with current set up, but if most people say it will be a big difference then i would consider it once i have a budget.

What size tire did you start with?

BB1857 08-29-2013 03:26 PM

Quote:

Originally Posted by Moonrider (Post 4134838)
Could you guys tell me how much should i expect paying for new gear 4:56 or 4:88 from 2013 auto 3:21 on 35". I'm fine with current set up, but if most people say it will be a big difference then i would consider it once i have a budget.

Thats a tough question to answer because its varies so greatly by the area youre in down to the shop you call...i am buying my gears and install kits from Rockridge 4wd for a tick over $700 and a friend who is a mechanic and has the tools is going to help me to do the install. In calling around some places in my area i was quoted $250 per axle at one place who does tons of drivetrain work all the way up to $500 per axle!! Yikes! My advice is find a local Jeep group in your area and start pinging the members for info...that will probably help you the most.

Chx beach 79 08-29-2013 06:34 PM

Got a call tonight from my mechanic saying they won't be done with my jeep until mid morning tomorrow!!!!

Still excited about the gears though!!!

Rightside 08-29-2013 08:23 PM

Is the Jeep dealer doing your regear? Curious if they spoke about how it will affect warranty, etc.

HAFICON 08-29-2013 08:25 PM

Congrats.. I just got mine back went from 3.73 to 4.88 with 35's. I have to say I am pretty disappointed. No real noticeable gain but I have been taking it pretty easy only got about 200 miles on it since the break in. Another 300 miles on it and I much see what it has.

foxsat71 08-29-2013 08:42 PM

I hope this isn't considered hijacking a thread, but would anyone here be interested in a certificate good for a set of Motive Gears with Master Rebuild Kits for both front and rear. Cert is a $650.00 value. They come directly from the manufacturer. You choose the ratio you want.

Moonrider 08-29-2013 08:58 PM

Quote:

Originally Posted by Gunner (Post 4134921)

What size tire did you start with?

I had the most basic tires/wheels size 29" ST

PieFace 08-29-2013 09:32 PM

Quote:

Originally Posted by Chx beach 79 (Post 4134196)
I'm no expert but from my research online and with the mopar techs at my jeep dealership. A 5.13 and 37's would be similar to a 4.10 with stock tires... Running a 4.88 with 37's would be similar to running a 3.73 with stock tires... Running a 4.56 with 37's would be similar to running a 3.21 with stock tires... I hope that helps. This is how they explained it to me.

A 5.13 and 37's will put me at 2700 rpm's at 70 mph. I do very little driving over 55 mph, that's why I went with the 5.13

measure your tires with a tape measure, your 37s may not really be 37s, especially if your rims are wider than 8.5.

Ive been studying this at length for about a year. If you have 4.10s, dont regear until you get to 37s. Then I suggest 4.88. (manual) if you have 3.21s and go to 35s, 4.10s or 4.56.

4.88 is a lot of gear for the pentastar if your not turning 37s.

as far as brand, you want Yukons. If i was looking to buy a truck on the secondary market, and it was geared, anything but Yukons would turn me away. Other gears make noise. spend a little more when it comes to this part of your truck. Cheaping out here could cost you on the trail, and will cost you in resale.

ps. yukons are not really that much more expensive check randy's ring and pinion.

foxsat71 08-29-2013 10:47 PM

Could point PieFace. Since you mentioned brands, what have you heard about Motive Gears?

Dmactampa 08-30-2013 12:27 AM

Quote:

Originally Posted by HAFICON (Post 4135981)
Congrats.. I just got mine back went from 3.73 to 4.88 with 35's. I have to say I am pretty disappointed. No real noticeable gain but I have been taking it pretty easy only got about 200 miles on it since the break in. Another 300 miles on it and I much see what it has.

I'm with you. Just got mine back with 4.56 and could barely tell a difference. Could have kept them stock and gone 37s and just kept it in 4th on the highway. It's exactly what I feared. Time to supercharge...

PieFace 08-30-2013 05:24 AM

Quote:

Originally Posted by foxsat71 (Post 4136611)
Could point PieFace. Since you mentioned brands, what have you heard about Motive Gears?

I feel like I have, my brain thinks the big brands are Yukon, USA, Nitro. Feel fee to add to the list

My point is if I'm reading a description on eBay, to buy a used jeep, Yukon I think is the brand you'd want to advertise.

4Jeepn 08-30-2013 05:58 AM

while the 5.13 might work math wise for the 37's the pinon size, gets very small.. so keep that in mind as a possible weak link in the system.

JK dana 30 5.13 vs. 3.73

http://i24.photobucket.com/albums/c1...51232284_n.jpg

photo from:Ford 8.8 Rear, 5.13's - Page 2 - Ford Explorer & Ranger Resource "Serious Explorations"

Chx beach 79 08-30-2013 06:10 AM

3 Attachment(s)
Quote:

Originally Posted by PieFace (Post 4136309)

measure your tires with a tape measure, your 37s may not really be 37s, especially if your rims are wider than 8.5.

Ive been studying this at length for about a year. If you have 4.10s, dont regear until you get to 37s. Then I suggest 4.88. (manual) if you have 3.21s and go to 35s, 4.10s or 4.56.

4.88 is a lot of gear for the pentastar if your not turning 37s.

as far as brand, you want Yukons. If i was looking to buy a truck on the secondary market, and it was geared, anything but Yukons would turn me away. Other gears make noise. spend a little more when it comes to this part of your truck. Cheaping out here could cost you on the trail, and will cost you in resale.

ps. yukons are not really that much more expensive check randy's ring and pinion.

Thanks! I got my Yukon Gears and carriers from Randy's... I have a automatic, and rarely drive over 60 mph. I will know in a few hours if I can tell a big difference from a 3.21 to a 5.13. from my research the difference should be noticeable especially since i am running 37's.

I will keep you guys posted...

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ave8er 08-30-2013 06:43 AM

3:21 TO 5:13... Yeah, there will be a little difference.

Jeep757 08-30-2013 06:52 AM

Ive got 3.21 gears on my 08 6spd jku. Currently running 33's (measured at 32"with vehicle weight, came with 245/75/16's. From what ive seen online going to 3.73 should put me back to "stock" but thinking of goin 4.10's for alittle extra power when I regear. Possibly 4.56's at the most.

mallaki 08-30-2013 08:56 AM

I have 2012 JKU Auto with 35s” and 3.21. In a week I have my gears replaced with Yukons 4.88.
I do a lot of highway driving as I live in NYC, but go off-road few times a year.

More and more people says here on the forum that 4.88 may be too much. Some people said that they even got disappointed after going from 3.21 to 4.88 on 2012 and up with 35s”.
I honestly, don’t feel the urge to re-gear, but all the experts tells me that I should. I am ok with my 3.21 gears as my jeep runs, accelerate and off-road nicely.

For the last time, someone experienced please,
1. do I need to re-gear?
2. Would it be wise to re-gear?
3. Why should I re-gear?

And we all have seen the gears chart, I have seen it too, so don’t send me there, but that still doesn’t convince me that I need to re-gear.

Thank you all..


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