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Old 03-30-2010, 01:53 PM   #1
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Upgrade to 4.56

I have a brand new Islander 2010 4dr. I want to upgrade my current 3:73 gearset to 4:56.

What do I need to purchase/install to accomplish this?

My tire size is 32.

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Old 03-30-2010, 02:15 PM   #2
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well unless your planning on running larger tires then you dont really need to regear.

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Old 03-30-2010, 02:51 PM   #3
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X2 with Cruser, especially if you have an auto. I would leave it alone.
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Old 03-30-2010, 09:24 PM   #4
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I want to regear because based on the jeep gear chart, if I have 32s I should go with a 4:56 gear to get the best performance from my new girl.
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Old 03-30-2010, 09:35 PM   #5
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In that case you need a Ring & Pinion and rebuilt kit for each axle and likely a shop to do the install ($1100-1400 bucks depending).

Unless you (or have friends) that have installed gears and set the backlash and have some specific tools, you'll want to have it done.

What tranny? Sounds like 4:11's might be a better choice but to each his own.
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Old 03-30-2010, 09:41 PM   #6
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Can you be more specific? Links? Picures? This is my first jeep. Iam a total newb.

The Islander have front Dana 30 and rear Dana 44.
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Old 03-30-2010, 09:44 PM   #7
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Sounds pretty complex to do it yourself. If you haven't done it before and can get good detailed instructions on how to do it and read up on it well before starting, it sounds doable, but it will still consume a lot of time making sure not to mess things up. If you've got the time I guess that won't matter. Worst case scenario you mess it up and have someone straighten it out.
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Old 03-30-2010, 10:15 PM   #8
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Old 03-30-2010, 10:20 PM   #9
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I wouldnt recommend diy for this mod.
Me neither. I ain't all that and a bag of donuts but I do a lot of work myself and wouldn't touch that job.

It's a job that I look at like "if I bother to learn this, how often can I make it pay off?" Not enough motivation for me to learn or buy the extra specialty tools.

If you do it, start with the front axle so if you hork something up you can still drive it (just remove the shaft if you need to).
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Old 03-30-2010, 10:46 PM   #10
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It's a job that I look at like "if I bother to learn this, how often can I make it pay off?" Not enough motivation for me to learn or buy the extra specialty tools.
Now, I like challenges but there in lies the major trade-off between diy and paying to have it done...besides the amount of time involved.
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Old 03-30-2010, 11:27 PM   #11
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Yep. I re-did my kitchen too. All of it. Electrical, plumbing etc. When the counter tops came, I was happy I paid for production and installation. How many counter tops can I possibly do in my life anyway?

Not worth my time. Glad to pay and cheaper than screwing it up myself and paying for re-work.
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Old 03-31-2010, 12:24 AM   #12
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4.56's for 32 tires is pretty low. IF you want to regear, go to 4.10's, not 4.56s unless you are doing a lot of crawling.

But I would say you don't even need to regear. Especially if you're new to this stuff you won't need gears that low. Keep stock gears and put the tires on, I'm sure you will be fine.
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Old 03-31-2010, 03:21 AM   #13
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I had 4.56s and 32s for a while with an autotrans; it was very good for towing my trailer. The 4.56s make me wish I had 4.88 now that I have 33s though.

They'll make you hop off the line like a bunny and your trans will hunt for gears less in the hills. You do have an autotrans, right?

Tell us more about where you live, how you drive/wheel, and other mods.
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Old 03-31-2010, 06:09 AM   #14
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Ok. I live in Puerto Rico. My daily drive is over town roads and not high ways. I do a lot of stops due to traffic lights.

When in highways or avenues, I would like a smooth ride.

I have autotrans.

Hilldweller, what do you mean by "they will make me hop off the line"?

I wont do it myself. So dont worry.

I have no mods, everything is factory. As I told before, this is my first jeep.

I want to start modding it in order to start enjoying what a jeep is capable of doing.
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Old 03-31-2010, 06:17 AM   #15
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I think what HD means is that nothing increases torque like regearing. Going to 4.56 will create so much torque at the low end that performance will seem like night and day.
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Old 03-31-2010, 06:42 AM   #16
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I think what HD means is that nothing increases torque like regearing. Going to 4.56 will create so much torque at the low end that performance will seem like night and day.
and that`s not good?
I mean, everyone is telling me that regearing is not necessary, but then you tell me that the performance will be like night and day...
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Old 03-31-2010, 07:12 AM   #17
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I think what HD means is that nothing increases torque like regearing. Going to 4.56 will create so much torque at the low end that performance will seem like night and day.
Si.

And what you gain in the bottom with the gears, you lose in the top. Claro?
If you're going to buzz around town, hit some of those muddy mountain trails, and not do much highway, you'll enjoy the 4.56s, same as I did. If you plan to add larger tires later, you might want something spinnier.
Do you think that 32s are it? Not considering 33s or 35s?
And maybe add a locker while you're regearing? It's the best time to do it.
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Old 03-31-2010, 07:14 AM   #18
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There are plusses and minuses to everything. Most people regear to be able to crawl better for rock crawling especially after increasing tire size from stock. It is expensive to regear. A side benefit is better low end torque. If the jeep is going to see a lot of highway use, then regearing lower (bigger number) will reduce economy over the life of the vehicle and also increase wear and tare on the engine (it has to turn more over the same distance). For towing the extra torque can come in handy. Getting off of the stop is also a side benefit. There are so many things that can be done to the jeep that choosing with limited funds can be difficult. Which to do first, etc. So, changes have to be prioritized and planned carefully. For instance, regearing, and then changing one's mind about tire size only to put yourself into another regearing situation can be expensive so plan carefully. Bottom line is everybody has to determine what is most important to them in their ride and then figure out how to get there. I consider it one of the joys of owning a jeep.
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Old 03-31-2010, 11:05 AM   #19
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There are plusses and minuses to everything. Most people regear to be able to crawl better for rock crawling especially after increasing tire size from stock. It is expensive to regear. A side benefit is better low end torque. If the jeep is going to see a lot of highway use, then regearing lower (bigger number) will reduce economy over the life of the vehicle and also increase wear and tare on the engine (it has to turn more over the same distance). For towing the extra torque can come in handy. Getting off of the stop is also a side benefit. There are so many things that can be done to the jeep that choosing with limited funds can be difficult. Which to do first, etc. So, changes have to be prioritized and planned carefully. For instance, regearing, and then changing one's mind about tire size only to put yourself into another regearing situation can be expensive so plan carefully. Bottom line is everybody has to determine what is most important to them in their ride and then figure out how to get there. I consider it one of the joys of owning a jeep.
Thanks jk'n.

I will create a new thread in order to get advized on what is the best mod to start with.

But I will like to continue this one with the correct advize on what do someone (with my same specs) need to upgrade from 3:73 to 4:56.

Your comments are of much help.
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Old 04-01-2010, 09:33 PM   #20
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Old 04-02-2010, 08:30 AM   #21
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Ok- to do the re-gear, here's what you'll need:
4.56 R&P kits (Dana 30, JK SPECIFIC!!!), (Dana 44 JK SPECIFIC!!!) Yes- our R&P's are thicker than those of even the TJ, so you NEED JK specific kits- don't let anyone tell you otherwise- same for the overhaul kits. And while I'm on the topic...
Front (Dana 30) and rear (Dana 44) JK-specific overhaul kits (again, JK specific is a MUST
That's it. Well, that, and a shop that knows what the hell they're doing. May cost from $500 for both up to $1200. $600-900 is what I'd call the "reasonable" range. And having the dealership do it does NOT un-void the warranty on the axles. If they say they will, get it in writing, and have a lawyer read it over. Seriously. That'd be great. Otherwise, consider your warranty on your axles void. MAYBE on the housings it will still be honored, but you need to talk to your service manager about this.
And before some jackass asks, NO this SHOULD* not void your warranty on anything but SOME axle parts. (* This is always a gray area, but as the LAW states, if the mod causes the problem, you're SOL. Re-gearing should NOT cause any problems, but SOME service managers are jerks. Thus, why I recommend talking to them beforehand to see what they say).


Also, when you have your carriers apart, I would HIGHLY recommend adding any lockers you may ever want to add. It may cost a lot now, but you will save the expense of new overhaul kits and re-paying the same labor cost again later ($1k plus, in other words- I want 5% ). Lockers are a wonderfully helpful mod. I would recommend an ARB/OX-type up front (open when off, locked at the push of a button/pull of a knob [giggity!]), so as to keep your driving experience the same. If you can't afford lockers, I would at LEAST recommend a Detroit Truetrac in the rear. It's a darn good substitute, and will help in daily driving duties if you see rain or snow. Also, for the rear, do NOT let ANYONE sell you a carrier for 3.92 and up for the JK- they WILL NOT FIT! See my threads about my Quadratec nightmare. Talk to the guys at 4ws.com They have done JK's personally, and know what they're doing. Plus, their prices are much lower than Q-tec or 4WD.com- Mark W.
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Old 04-02-2010, 10:21 AM   #22
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I was considering the move from 3.73 to 4.56, and went to 4.88 after talking to Hilldweller. I have 295/75/16s (33.6 inches), tires and am turning 2400rpm at 70 mph in overdirive, I get 15.5 mpg in the city, 16.5 highway. It's very drivable and I'm set for 35s at my next tire change. And I agree with Mark on upgrading the Diffs if they are open and you plan on using the jeep in the mud, rocks or snow. I went with the Detroit TrueTracs front and rear and don't even know they are there until I get on the trail. Randy's Ring and Pinion had the best prices when I went looking, and they know what they are doing as far as geting you the right parts.
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Old 04-02-2010, 11:44 AM   #23
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Ok.

I have prepare my parts list, and here it goes:

Dana 30 4.56 Ring and Pinion - JK ONLY
http://www.quadratec.com/products/52419_95X_A_PG.htm

Dana 44 4.56 Ring and Pinion - JK ONLY
http://www.quadratec.com/products/52419_95X_C_PG.htm

Dana 44 JK Ring & Pinion Install Kit
http://www.quadratec.com/products/52419_807.htm

Dana 30 JK Ring & Pinion Install Kit
http://www.quadratec.com/products/52419_805.htm

Dana 44 Detroit Locker (3.92 & UP)
TracTech Dana 44 Detroit Locker (3.92 & UP)

Dana 30 Detroit Locker (3.73 & UP)
TracTech Dana 30 Detroit Locker (3.73 & UP)


What do you think? Comments? Recommendations? Anything else that I need?
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Old 04-02-2010, 01:17 PM   #24
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A Detroit locker, and a Detroit TrueTrac are two different things. A Detroit locker isn't a good DD diff. Wth a new jeep your pinion bearings should be good, but you will want to replace the carrier bearings for the TrueTracs.
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Old 04-02-2010, 02:44 PM   #25
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NO! NO Detroit lockers on a DD! Not fun- TRUE TRAC! Big difference. Also cheaper and as I said, DO NOT GET A 3.92 AND UP REAR DIFF! IT WILL NOT FIT! Yeesh Mark W.
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Old 04-02-2010, 05:31 PM   #26
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So I should discard the Detroit lockers and choose a Detroit TrueTrac like this?

Detroit Trutrac Limited Slip Differential for 07-10 Jeep® Wrangler & Wrangler Unlimited JK with Dana 44 Rear Axle - Quadratec

I couldnt find a TruTrac for my front Dana 30.
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Old 04-04-2010, 04:56 PM   #27
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They definitely have them for the front and rear at Q-tec, BUT- order from ringpinion.com MUCH better company. Q-tec is pure garbage.

Again, MAKE SURE IT'S 3.73 AND DOWN FOR THE REAR. Regardless of gearing, the JK will ONLY take the smaller carrier. Do NOT let anyone tell you different. I had a huge headache (see the post "F Quadratec") over this because of Q-tec- Mark W.
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Old 04-05-2010, 09:58 AM   #28
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Ok. New parts list:

USA Standard Ring & Pinion gear set for Dana Spicer 44 in a 4.56 ratio
ZG D44-456T - CROWN,DANA,DANA SPICER,DANA SPICER,PINION,RING,RING PINION,CROWN PINION,CROWN WHEEL,SPICER,WRANGLER,DANA 44,DIFFERENTIAL,SPICER 44,TJ,GEAR,JEEP - USA Standard Ring & Pinion gear set for Dana Spicer 44 in a 4.56 ratio. USA Standard Gear

Detroit Locker for Dana Spicer 44 differential with 30 spline axles. For 3.73 and down
DET187S-16D - DETROIT,DETROIT LOCKER,LOCKER,DANA 44,DIFFERENTIAL,SPICER 44,TJ - Detroit Locker for Dana Spicer 44 differential with 30 spline axles. For 3.73 and down. The Detroit Locker provides maximum traction for off-road or racing use. The heavy

Dana 44 JK 2007 & NEWER REAR PINION KIT , NON-RUBICON ONLY
PK D44JK-STD - INSTALL,INSTALL KIT,INSTALLATION KIT,KIT,JK,TIMKEN,TIMKEN BEARINGS,DANA,DANA SPICER,DANA SPICER,PINION,YUKON,SPICER,WRANGLER,DIFFERENTIAL,S PICER 44,JEEP,SHIM - Dana 44 JK 2007 & NEWER REAR PINION KIT , NON-RUBICON ONLY .

USA Standard Ring & Pinion gear set for Dana Spicer 30 in a 4.56 ratio
ZG D30-456 - CROWN,DANA,DANA SPICER,DANA SPICER,PINION,RING,RING PINION,CROWN PINION,CROWN WHEEL,SPICER,CJ,DANA 30,DIFFERENTIAL,SPICER 30,GEAR,JEEP - USA Standard Ring & Pinion gear set for Dana Spicer 30 in a 4.56 ratio. USA Standard Gear offers a l

Detroit Locker for Dana Spicer 30 differential. For 3.73 and up
DET162S-60B - DETROIT,DETROIT LOCKER,LOCKER,YJ,DANA 30,DIFFERENTIAL,SPICER 30,TJ,JEEP - Detroit Locker for Dana Spicer 30 differential. For 3.73 and up. The Detroit Locker provides maximum traction for off-road or racing use. The heavy-duty case and

USA Standard Master Overhaul Kit for the Dana Spicer 30 front differential without C-sleeve
ZK D30-F - MASTER KIT,MASTER OVERHAUL KIT,INSTALL,INSTALL KIT,INSTALLATION KIT,KOYO,KIT,DANA,DANA SPICER,DANA SPICER,OVERHAUL KIT,SPICER,XJ,YJ,WRANGLER,CJ,DANA 30,DIFFERENTIAL,SPICER 30,JEEP - USA Standard Master Overhaul Kit for the Dana Spicer 30 f
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Old 04-05-2010, 10:07 AM   #29
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Quote:
Originally Posted by melo1705 View Post
Ok. New parts list:

USA Standard Ring & Pinion gear set for Dana Spicer 44 in a 4.56 ratio
ZG D44-456T - CROWN,DANA,DANA SPICER,DANA SPICER,PINION,RING,RING PINION,CROWN PINION,CROWN WHEEL,SPICER,WRANGLER,DANA 44,DIFFERENTIAL,SPICER 44,TJ,GEAR,JEEP - USA Standard Ring & Pinion gear set for Dana Spicer 44 in a 4.56 ratio. USA Standard Gear

Detroit Locker for Dana Spicer 44 differential with 30 spline axles. For 3.73 and down
DET187S-16D - DETROIT,DETROIT LOCKER,LOCKER,DANA 44,DIFFERENTIAL,SPICER 44,TJ - Detroit Locker for Dana Spicer 44 differential with 30 spline axles. For 3.73 and down. The Detroit Locker provides maximum traction for off-road or racing use. The heavy

Dana 44 JK 2007 & NEWER REAR PINION KIT , NON-RUBICON ONLY
PK D44JK-STD - INSTALL,INSTALL KIT,INSTALLATION KIT,KIT,JK,TIMKEN,TIMKEN BEARINGS,DANA,DANA SPICER,DANA SPICER,PINION,YUKON,SPICER,WRANGLER,DIFFERENTIAL,S PICER 44,JEEP,SHIM - Dana 44 JK 2007 & NEWER REAR PINION KIT , NON-RUBICON ONLY .

USA Standard Ring & Pinion gear set for Dana Spicer 30 in a 4.56 ratio
ZG D30-456 - CROWN,DANA,DANA SPICER,DANA SPICER,PINION,RING,RING PINION,CROWN PINION,CROWN WHEEL,SPICER,CJ,DANA 30,DIFFERENTIAL,SPICER 30,GEAR,JEEP - USA Standard Ring & Pinion gear set for Dana Spicer 30 in a 4.56 ratio. USA Standard Gear offers a l

Detroit Locker for Dana Spicer 30 differential. For 3.73 and up
DET162S-60B - DETROIT,DETROIT LOCKER,LOCKER,YJ,DANA 30,DIFFERENTIAL,SPICER 30,TJ,JEEP - Detroit Locker for Dana Spicer 30 differential. For 3.73 and up. The Detroit Locker provides maximum traction for off-road or racing use. The heavy-duty case and

USA Standard Master Overhaul Kit for the Dana Spicer 30 front differential without C-sleeve
ZK D30-F - MASTER KIT,MASTER OVERHAUL KIT,INSTALL,INSTALL KIT,INSTALLATION KIT,KOYO,KIT,DANA,DANA SPICER,DANA SPICER,OVERHAUL KIT,SPICER,XJ,YJ,WRANGLER,CJ,DANA 30,DIFFERENTIAL,SPICER 30,JEEP - USA Standard Master Overhaul Kit for the Dana Spicer 30 f
might want to check that one, it wont fit the gears you want
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Old 04-05-2010, 10:09 AM   #30
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ignore what i said, just read the post above it from thaduke2003

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