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Old 03-11-2012, 11:02 PM   #1
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4:10s 3.8 and 35s

who is running this set up and how bad is the loss of power? Do I need to regear? if so to what 5:13S it is an auto 08 jk unlimited with some heavy bumpers winch etc.

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Old 03-11-2012, 11:08 PM   #2
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What are your axles? I wouldn't recommend the swap to 35's unless you have a Rubicon. Power loss is pretty noticeable also, at least with a straight 6 motor. If you did do the regear, I would have to say go with 4.88's for 35's.

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Old 03-11-2012, 11:33 PM   #3
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With the Auto you will notice a big loss in power. I'm guessing you have a rubi since you have 4.10's?

If so I would get 5.32's With the auto I wouldn't use any other gear. If you have a sport, get the 5.13's
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Old 03-12-2012, 12:36 AM   #4
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I like the 5.38s with my 2 door.
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Old 03-12-2012, 12:49 AM   #5
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The general consensus in my 4x4 group is to go with 5.13's. With that it will be, feel wise, like it was stock again. Everyone I know personally who got a 4.88 ended up regearing later, to 5.13, as the "feel" they wanted wasn't quite dead on anymore.

When are you looking to regear?
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Old 03-12-2012, 01:05 AM   #6
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Quote:
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What are your axles? I wouldn't recommend the swap to 35's unless you have a Rubicon. Power loss is pretty noticeable also, at least with a straight 6 motor. If you did do the regear, I would have to say go with 4.88's for 35's.
Toolman he's got a JK.. Different situation
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I like the 5.38s with my 2 door.
yep 5.13's or ^this^ 5.38's.. Both will be good..
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Old 03-12-2012, 03:22 AM   #7
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I was having the same setup and it was fine. except mine is 2 doors with softtop & without winch... Now i have regeared to 4.88 and its great
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Old 03-12-2012, 03:33 AM   #8
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I wouldn't recommend the swap to 35's unless you have a Rubicon.

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Old 03-12-2012, 03:51 AM   #9
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I wouldn't recommend the swap to 35's unless you have a Rubicon.


Your pics are showing up as little red x's... and he's got a JK.. He's fine running 35's.. Perhaps the only thing he would need to do axle wise is want to look into sleeving and trussing or what ever to his D30 if he is gonna be going hard on it..


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Old 03-12-2012, 09:21 AM   #10
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Agree with what XJ Knight has been saying here. He'll be fine with 35's on his D30 but you may want to weld on some inner c-gussets and you can do the weld less inner sleeves from Nitro. I have 35's too on an '08 2 door X, I have stock 3.73 and am gearing to 5.13

Here's the gussets I got Poly Performance JEEP/TRUCK & BUGGY*::*Suspension*::*Suspension & Lift Kits*::*Jeep Suspension Systems*::*2007-Current Jeep JK Wrangler Suspension Systems*::*Synergy Suspension*::*Synergy Suspension Jeep JK Front D30/44 Inner C Gusset Kit - 4X4 Off-R

Here's a thread on the Nitro sleeves over at jkowners

Nitro dana 30 sleeve install - JKowners.com : Jeep Wrangler JK Forum

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Old 03-12-2012, 09:54 AM   #11
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lol i ran 37s with 373s and an auto tranny.

it was bearable/tolerable.

its all subjective.
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Old 03-12-2012, 09:57 AM   #12
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lol i ran 37s with 373s and an auto tranny.

it was bearable/tolerable.

its all subjective.
I like to be able to get to the grocery store and back all in one day.
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Old 03-12-2012, 11:25 PM   #13
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Quote:
Originally Posted by XJ Knight
Toolman he's got a JK.. Different situation

yep 5.13's or ^this^ 5.38's.. Both will be good..
Ah, got ya, just trying to help.

I will agree with 5:13 & up on the gears with an auto though
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Old 03-13-2012, 08:57 AM   #14
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The OP hasn't answered back, but

If he has the Rubi--5.38s--hands down !

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Old 03-15-2012, 07:29 PM   #15
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its a rubi

o8 4 door rubcicon
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Old 03-15-2012, 08:08 PM   #16
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It seems to me it would depend where you live. My jeep is a 2011 JKUR, 6 spd. with 35's. Down here in Florida it does ok. But if you in the hills you might need to regear.
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Old 03-15-2012, 08:50 PM   #17
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Manual 4.56 or 4.88
Auto 5.13 or 5.38

That is all...
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Old 03-16-2012, 01:33 AM   #18
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6 speed running 35s w/ 4:10 just fine, pull boat with little trouble. Buddy has 4:88 w/ 35s, 6 speed and hardly ever uses 1st gear.
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Old 03-17-2012, 08:37 AM   #19
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Quote:
Originally Posted by pluke the 2
lol i ran 37s with 373s and an auto tranny.

It was bearable/tolerable.

Its all subjective.
x2
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Old 03-17-2012, 02:19 PM   #20
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I've got a 09 2Dr Rubicon AT with 255-80/17 BFG KM2's that are only 33.5 tall and are narrow so they are much lighter than most 33's and roll easier because they're narrow and even with these 33's I noticed alot of power loss and I can hardly ever use OD.

Would you all recommend going to 4.88's or 5.13's??? I will never go bigger than these narrow 33's and it's my daily driver.

I'm sure there is and even more noticable loss of power if you had 35's...
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Old 03-17-2012, 02:24 PM   #21
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Quote:
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I've got a 09 2Dr Rubicon AT with 255-80/17 BFG KM2's that are only 33.5 tall and are narrow so they are much lighter than most 33's and roll easier because they're narrow and even with these 33's I noticed alot of power loss and I can hardly ever use OD.

Would you all recommend going to 4.88's or 5.13's??? I will never go bigger than these narrow 33's and it's my daily driver.

I'm sure there is and even more noticable loss of power if you had 35's...
I'm a YJ guy, but have experience with gearing in quite a few older Jeeps, 4x4 trucks, & race cars.

If you are going to stick with the 33's, I would recommend 4:10 gears with a standard or 4:56 with an automatic. That's just my opinion, if you look at a gearing chart, 4:10 gears & 33's are a pretty good match.
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Old 03-17-2012, 02:28 PM   #22
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Quote:
Originally Posted by The Toolman

I'm a YJ guy, but have experience with gearing in quite a few older Jeeps, 4x4 trucks, & race cars.

If you are going to stick with the 33's, I would recommend 4:10 gears with a standard or 4:56 with an automatic. That's just my opinion, if you look at a gearing chart, 4:10 gears & 33's are a pretty good match.
Why would anybody want to spend $2000 on "stock" gears
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Old 03-17-2012, 02:40 PM   #23
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I've already got 4.10's and if I was going to spend the money to do it I can't imagine not going to atleast 4.88's
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Old 03-17-2012, 03:03 PM   #24
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Quote:
Originally Posted by kjeeper10

Why would anybody want to spend $2000 on "stock" gears
Again, think outside the box here, it depends on the setup, I was referring to the post above that actually. Also, $2,000 for gears is way too steep unless they are forged. Sounds like someone got ripped off in the past.

For 33" tires - 4:10's or 4:56's
For 35" tires - 4:88's or 5:13's

But that is not set in stone, just common where I come from
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Old 03-17-2012, 03:05 PM   #25
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Quote:
Originally Posted by B11
I've already got 4.10's and if I was going to spend the money to do it I can't imagine not going to atleast 4.88's
Just depends on your motor, transmission, & what size tires you plan to go with. Also depends if it is a daily driver or a weekend warrior
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Old 03-17-2012, 03:16 PM   #26
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Again, think outside the box here, it depends on the setup, I was referring to the post above that actually. Also, $2,000 for gears is way too steep unless they are forged. Sounds like someone got ripped off in the past.

For 33" tires - 4:10's or 4:56's
For 35" tires - 4:88's or 5:13's

But that is not set in stone, just common where I come from

Toolman is right.

you want to do 513s with an automatic non rubicon

and you want to do 488s with an manual non rubicon

rubicon automatic you want 538s

rubicon manual you want 513s

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if your spending 2,000 dollars on a regear, your not only getting ripped off but your also getting raped.
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Old 03-17-2012, 03:19 PM   #27
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I like the narrow 33 KM2's I run and it's my daily driver as well as weekend rover. I probably don't put 50 miles a month, on average, at highway speeds.
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Old 03-17-2012, 03:19 PM   #28
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ask me how we know....

Sold our 2010 sport white

we got a 2010 sport silver

Sold 2011 rubicon silver

Got 2012 rubicon silver
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Old 03-17-2012, 03:33 PM   #29
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$1500-$2000 is what I've seen depending where you live. $2000 is high and a number I just blabbered out.

I got quoted $1700 yesterday.

Non Rubi guys - good time throw locker(s) in there while you at it
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Old 03-18-2012, 12:04 AM   #30
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Quote:
Originally Posted by B11
I've got a 09 2Dr Rubicon AT with 255-80/17 BFG KM2's that are only 33.5 tall and are narrow so they are much lighter than most 33's and roll easier because they're narrow and even with these 33's I noticed alot of power loss and I can hardly ever use OD.

Would you all recommend going to 4.88's or 5.13's??? I will never go bigger than these narrow 33's and it's my daily driver.

I'm sure there is and even more noticable loss of power if you had 35's...
Based on the gearing in the 4 speed auto I would get 5.13's if its a sport or 5.38's if its a rubi.

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