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Old 02-11-2011, 11:45 PM   #1
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I need 3.73

Anybody know where I can get a set of DANA 30 and 44 3.73 gears that won't break the bank? When the dealer swapped out the stock wheel and tire setup on my 2010 JK 2dr they went up from the 225/75R16 to a 265/70R17 and the turds didn't up the gears. Thats about a 3 inch difference in height, and I basically have no 6th gear, well downhill, lol.
I thought about trying to get the dealer to correct this issue considering they made the change, but I have a feeling I would have more luck stealing meat from a lion. Any thoughts or help on this would be great.

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Old 02-11-2011, 11:53 PM   #2
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ugh.. I would hassle the dealer to see what happens first but that's just me.. Problem with them is they don't think about gearing when upgrading a set of tires.. A lot of people don't think about that when they pull of the lot..

Question: Do you think you will be lifting your jeep and/or putting bigger tires on it anytime soon?

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Old 02-11-2011, 11:56 PM   #3
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Originally Posted by jeeper4life73 View Post
Anybody know where I can get a set of DANA 30 and 44 3.73 gears that won't break the bank? When the dealer swapped out the stock wheel and tire setup on my 2010 JK 2dr they went up from the 225/75R16 to a 265/70R17 and the turds didn't up the gears. Thats about a 3 inch difference in height, and I basically have no 6th gear, well downhill, lol.
I thought about trying to get the dealer to correct this issue considering they made the change, but I have a feeling I would have more luck stealing meat from a lion. Any thoughts or help on this would be great.
I take it you are rocking 3.21's right now. I would go down to 4.10's if I were you. First of all there are many floating around due to the fact that they come stock in the Rubi's & lots of those guys are scrapping them for even lower gears. Plus your next set of tires will prolly be taller than your new ones, lol. Just a thought.
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Old 02-11-2011, 11:57 PM   #4
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Question: Do you think you will be lifting your jeep and/or putting bigger tires on it anytime soon?[/QUOTE]

Plans to lift RC 2.5, going up to a 33/12.5 17. So if I can haggle the dealer to do it for me i would be good to go.
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Old 02-12-2011, 12:04 AM   #5
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Originally Posted by jeeper4life73 View Post
Question: Do you think you will be lifting your jeep and/or putting bigger tires on it anytime soon?
Plans to lift RC 2.5, going up to a 33/12.5 17. So if I can haggle the dealer to do it for me i would be good to go. [/QUOTE]

I've never heard of a dealer throwing in gears with a tire purchase. They care about looks, not drivability.
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Old 02-12-2011, 12:10 AM   #6
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Originally Posted by jeeper4life73 View Post
Question: Do you think you will be lifting your jeep and/or putting bigger tires on it anytime soon?
Plans to lift RC 2.5, going up to a 33/12.5 17. So if I can haggle the dealer to do it for me i would be good to go. [/QUOTE]

OK. Well this my opinion.. For around that size tire as in the 17in rim for the 33 you would be looking for the closest equivalant to that in a metric size tire.. Your gonna want something lower than 4.11's.. For that tire size or even if you so decide so go to 35's or the metric equivalent I would strongly suggest either 456's or 488's.. It might not be ideal for your tire size right now but regearing is expensive and unless you got deep pockets, I wouldn't recommend doing it more than once if you can avoid it..
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Old 02-12-2011, 12:21 AM   #7
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OK. Well this my opinion.. For around that size tire as in the 17in rim for the 33 you would be looking for the closest equivalant to that in a metric size tire.. Your gonna want something lower than 4.11's.. For that tire size or even if you so decide so go to 35's or the metric equivalent I would strongly suggest either 456's or 488's.. It might not be ideal for your tire size right now but regearing is expensive and unless you got deep pockets, I wouldn't recommend doing it more than once if you can avoid it..[/QUOTE]


Thanks for the input I was tossing around the idea of the 4.11s also. Wasn't sure if i wanted to go as low as 4.56 though. I ran 4.56s on my 03 TJ with 35 MT BHCs and that was way more than enough for that rig. I will have to do some more research on the specs for the JK but I have heard the 3.73 are a good balance for a daily drive with modest mods. Thanks again!
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Old 02-12-2011, 12:25 AM   #8
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Old 02-12-2011, 12:28 AM   #9
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I've never heard of a dealer throwing in gears with a tire purchase. They care about looks, not drivability.[/QUOTE]


Neither have I, but they should have considered the offset when they jumped up to such a different size from what it was set up stock. I am going to give it a shot, all they can do is tell me no. I'll post the result when i get an answer. Not getting my hopes up.
FYI IMO: 3.21 are crappy gears and should be left on a something like a go-kart lol
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Old 02-12-2011, 12:39 AM   #10
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Might try some off road shops to see if they had some JK's that lowered their gears and if there is a set laying around. Also may try E-bay. If you go to any lower you will be hard pressed to find a set that fits yours because the Rubis have 44's front and back'

If you end up going new I would go with the 4.10
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Old 02-12-2011, 07:00 AM   #11
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Quote:
Originally Posted by XJ Knight View Post
Plans to lift RC 2.5, going up to a 33/12.5 17. So if I can haggle the dealer to do it for me i would be good to go.
OK. Well this my opinion.. For around that size tire as in the 17in rim for the 33 you would be looking for the closest equivalant to that in a metric size tire.. Your gonna want something lower than 4.11's.. For that tire size or even if you so decide so go to 35's or the metric equivalent I would strongly suggest either 456's or 488's.. It might not be ideal for your tire size right now but regearing is expensive and unless you got deep pockets, I wouldn't recommend doing it more than once if you can avoid it..[/QUOTE]

xj if he has a six speed he should go a lot deeper, 5.38 and he'll be able to use 6th gear. my friend just put 5.38 in his 6 speed 2010 with 35's and turns 2200 rpm at 73 mph.. jmo
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Old 02-12-2011, 07:12 AM   #12
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I have 4.56, autotrans, and 33s. After using a Flashpaq, it's perfect.
Until I tow my trailer and I wish for 4.88s.

You'll need a different carrier up front to go from 3.21 to anything. And don't compare it to any other Wrangler; historic comparisons don't have linear results. A JK is a JK is a JK ---- until they get Pentastars; and then they shouldn't be called JKs any longer...
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Old 02-12-2011, 09:10 AM   #13
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First of all you went from a 29" tire to a 31.6" tire. Since many JK's are sold with those gears and 32" tires stock, you shouldn't be having such an issue and it certainly isn't the dealer's fault.

I would be more concerned if whether or not they calibrated your speedometer after the change. Your speed will be off by 5mph.

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Old 02-12-2011, 10:58 AM   #14
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my friend just put 5.38 in his 6 speed 2010 with 35's and turns 2200 rpm at 73 mph.. jmo

I doubt that any JK with a 6 speed manual, running 35's would see 2200 rpms at 73 mph unless he's re-geared his TC.

I'm running 35's & 5.13's & calculated my speed with a GPS. At 69 mph I'm spinning 2800 RPM's.

When I said go 4.10's or 4.11's, I was saying, "For hells sake, don't spend money on 3.73's."

Unless you're on the hiway for long periods of time, I'd go even lower than the 4.11's.

With all this conflicting data, it's hard to make the correct gear choice for your personal needs. Do your homework so you are happy when you run it through the gears the first time after gear change.

Honestly, I am so happy with my gear choice. Keeping the hiway drivability was very important for me. I drive to Moab monthly if not more, (120 miles) I just returned from a 630 mile trip. I kept it at 69 mph pretty much the whole way, checked the rear end temps 3 times.
And, the 5.13's are so much better offroad than all of the higher gears.

http://www.wranglerforum.com/f33/hiw...13s-78844.html

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Old 02-12-2011, 11:12 AM   #15
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I have 3.73 and was thinking another making the exact tire switch the OP had been given from the dealer. I really want to keep my gears and don't plan on lifts anytime soon, but was afraid my current gears would mean sluggish performance in my DD.
Any thoughts?
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Old 02-12-2011, 11:41 AM   #16
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Once again, those tires are 31.6" and are slight smaller and wider than the stock 32" tires, so you won't have any performance issues with 3.73 gears.
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Old 02-12-2011, 03:10 PM   #17
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I have the stock 31.6 tires on my JK and the 3.21 gears with the 6 spd also. I'm not an aggressive driver and while I do find the power to be lacking I dont have any issues at all with going into 6th at 55-60 mph or shifting to 5th to maintain that speed if I need some extra power or going up a hill. I do have a 2dr but I also have bumpers and armor and even with the rear seat removed I'm well heavier than it was stock. I had my computer flashed so my speedo is correct. I'm wondering if the OP is expecting the JK to perform above its capability and dont think 3.73 is going to make hardly a diffrence at all. I drove a 2dr rubi about 2 weeks ago and really didnt notice much a diffrence at all in the way it drove, granted I only went about 5 miles but while i'm sure the gearing makes a diffrence it wasnt drastic to me at all.
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Old 02-13-2011, 03:02 AM   #18
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Hummmm......

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Originally Posted by daggo66 View Post
First of all you went from a 29" tire to a 31.6" tire. Since many JK's are sold with those gears and 32" tires stock, you shouldn't be having such an issue and it certainly isn't the dealer's fault.

I would be more concerned if whether or not they calibrated your speedometer after the change. Your speed will be off by 5mph.

Car / SUV / Van / Light Truck Tire Calculations
The dealer is the one that made the upgrade bro, I bought it brand new with the options already installed. I assumed they would have done it right, my ignorance, its a dealership and yes its their fault and my oversight. Whether I should be having this issue or not, doesn't change the fact that I am. Most of the documentation I have read from CJD states that the Jeeps that come "from the factory" with 17 wheels typically have 3.73 gears standard because most of them also have the tow pkg. Mine had 16 in wheels and no tow pkg. I was told today by the dealership that a base model JK 2dr, which mine started out as, will have 16s and 3.21 standard but when you build your own from the factory upgraded gears are an option. Another thing to consider is that these are not Jeep wheels, they are aftermarket, Incubus Alloy Crusher Chrome 17X9in wheels, and alot heavier than the stock 16s.

And no they didn't reset the speedo either, I had to go back and get that done after I was pulled over for running 11 miles over on a government installation. Not a pretty ticket, and I was sure I was doing 40 in a 35. They usually wont get you for 5 over. Military Police don't mess around with speeding.
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Old 02-13-2011, 07:39 AM   #19
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The dealer is the one that made the upgrade bro, I bought it brand new with the options already installed. I assumed they would have done it right, my ignorance, its a dealership and yes its their fault and my oversight. Whether I should be having this issue or not, doesn't change the fact that I am. Most of the documentation I have read from CJD states that the Jeeps that come "from the factory" with 17 wheels typically have 3.73 gears standard because most of them also have the tow pkg. Mine had 16 in wheels and no tow pkg. I was told today by the dealership that a base model JK 2dr, which mine started out as, will have 16s and 3.21 standard but when you build your own from the factory upgraded gears are an option. Another thing to consider is that these are not Jeep wheels, they are aftermarket, Incubus Alloy Crusher Chrome 17X9in wheels, and alot heavier than the stock 16s.

And no they didn't reset the speedo either, I had to go back and get that done after I was pulled over for running 11 miles over on a government installation. Not a pretty ticket, and I was sure I was doing 40 in a 35. They usually wont get you for 5 over. Military Police don't mess around with speeding.
Go to the JAG (what base? I work in a support capacity for military forensics) and explain that your Jeep was delivered with an inaccurate speedo/odo and that the dealership remedied it.
It is actually a felony (third degree, I believe) for the dealer to modify a new vehicle in a way that alters the speedo/odo to read pessimistic without correcting it.
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Old 02-13-2011, 08:28 AM   #20
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I also have the 6/sp and 3.21. It works well for my style of driving. I know i never use 6th. unless i get on the super slab and wanna go over 70mph...which i don't do very often...unless i'm going on a road trip, then again i'd rather take hyways! I was always leary about passing vehicles, didn't think i had enough power. It took me awhile to get used to the higher rpm/powerband on this rig. I thought i might blow the engine if i got above 2800rpm...actually it's just gettin ready to go. Now i know its nothing like my V8, just takes awhile to get used to is all. The joy of owning a stick, you can always drop down another gear or two. Good luck buddy!
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Old 02-13-2011, 09:07 AM   #21
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I'm in the same boat with the 3.21 gears and 31" tires. I plan to move up to 33 inch tires then possibly 35 inch with a small lift. I imagine it might be worth it just to move up to 4.88 gears right? Do I stand to lose anything with 4.88 gears and 31 inch tires(for the rest of the life of the tire)? Will gas mileage drop if I up the gears without increasing tire size?
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Old 02-13-2011, 09:12 AM   #22
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I had 3.21 in my 6 spd when I got it. I put some 315/70r17 on it and found the 3.21 to be very poor performers. I found out that to change gears to lower than a 3.68 that I would also need to change carriers. So to go to the 3.73, you would also need carriers. I ran across a deal on eBay for a set of 4.10 ring and pinion with carriers that were low mileage take outs.
Also, to Daggo's point, you will want to recal your speedo, which the dealer can do up to 32" tire. Anything bigger, look to an after market tuner, I used AEV procal.
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Old 02-13-2011, 11:13 AM   #23
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I also have the 6/sp and 3.21. It works well for my style of driving. I know i never use 6th. unless i get on the super slab and wanna go over 70mph...which i don't do very often...unless i'm going on a road trip, then again i'd rather take hyways! I was always leary about passing vehicles, didn't think i had enough power. It took me awhile to get used to the higher rpm/powerband on this rig. I thought i might blow the engine if i got above 2800rpm...actually it's just gettin ready to go. Now i know its nothing like my V8, just takes awhile to get used to is all. The joy of owning a stick, you can always drop down another gear or two. Good luck buddy!
This is true of my JK as well. I often never go over 2500rpm when I drive. When you do need power you must get up to a minimum 3000 before it wants to run. This is what alot of people have problems with I believe. I know I'm still kinda weirded out by it. Keep in mind this is a 202 hp Jeep and there is balls there, they are just hard to find. More HP at slightly lower RMP'S would do the JK a great justice in my opionion. It still has made plenty of Highway trips around North East PA for me and theres some pretty steep hills here.
5th gear 70 mph and it pulls them fine, you just kinda got to work at it alitle harder with your right foot.
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Old 02-13-2011, 11:41 AM   #24
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4.10s are great for my JKU auto, cause I can cruise at 70 mph/2000rpm using O/D (level),with big 33s-KEWL


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This is true of my JK as well. I often never go over 2500rpm when I drive. When you do need power you must get up to a minimum 3000 before it wants to run. This is what alot of people have problems with I believe. I know I'm still kinda weirded out by it. Keep in mind this is a 202 hp Jeep and there is balls there, they are just hard to find. More HP at slightly lower RMP'S would do the JK a great justice in my opionion. It still has made plenty of Highway trips around North East PA for me and theres some pretty steep hills here.
5th gear 70 mph and it pulls them fine, you just kinda got to work at it alitle harder with your right foot.
Anything bigger than 33s and you should go up in diff gear No's

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Old 02-13-2011, 03:18 PM   #25
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4.10s are great for my JKU auto, cause I can cruise at 70 mph/2000rpm using O/D (level),with big 33s-KEWL




Anything bigger than 33s and you should go up in diff gear No's

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Jimbo, I have a JK auto 4Dr with 33s and was thinking of going to 4.56 so if I decide to go with 35s later I still would be ok. That sound like the right thing to do?
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Old 02-13-2011, 03:25 PM   #26
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Yea, if your going to the cost of changing, it should be ONE TIME-


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Jimbo, I have a JK auto 4Dr with 33s and was thinking of going to 4.56 so if I decide to go with 35s later I still would be ok. That sound like the right thing to do?
So I would have 5.13s installed if you have slightest idea of 35" tires-

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Old 02-13-2011, 09:51 PM   #27
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Yea, if your going to the cost of changing, it should be ONE TIME-
So I would have 5.13s installed if you have slightest idea of 35" tires-
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I couldn't agree more!!!
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Old 02-14-2011, 12:04 PM   #28
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I doubt that any JK with a 6 speed manual, running 35's would see 2200 rpms at 73 mph unless he's re-geared his TC.

I'm running 35's & 5.13's & calculated my speed with a GPS. At 69 mph I'm spinning 2800 RPM's.

When I said go 4.10's or 4.11's, I was saying, "For hells sake, don't spend money on 3.73's."

Unless you're on the hiway for long periods of time, I'd go even lower than the 4.11's.

With all this conflicting data, it's hard to make the correct gear choice for your personal needs. Do your homework so you are happy when you run it through the gears the first time after gear change.

Honestly, I am so happy with my gear choice. Keeping the hiway drivability was very important for me. I drive to Moab monthly if not more, (120 miles) I just returned from a 630 mile trip. I kept it at 69 mph pretty much the whole way, checked the rear end temps 3 times.
And, the 5.13's are so much better offroad than all of the higher gears.

http://www.wranglerforum.com/f33/hiw...13s-78844.html

Good luck
I checked mine today. 2100-2200 RPM's at 70 MPH. 6spd manual with 35's and 3.73 gears.
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Old 02-14-2011, 12:21 PM   #29
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I checked mine today. 2100-2200 RPM's at 70 MPH. 6spd manual with 35's and 3.73 gears.
With 3.73's that sound right. I was replying to a quote that said his buddy was seeing those rpm's while running 5.38's. No chance in hell.
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Old 03-09-2011, 04:27 PM   #30
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Update on gear issue

Ok everyone. Didn't mean to leave out my thanks for all the great feedback.
The end result: The dealer won't do anything about the gearing. Oh well I will make due. Eventually I will get better gears. Probably about the time I get a new set of tires and a taller lift.

I did get a 2.5 RC coil and shock lift. Added a set of 1.5" adapters (still 5X5) to help offset the change in center of gravity and replaced the stock single out muffler for the Gibson dual. Still running with the same wheels and tires. I like the look, itís a much tougher stance, but I will definitely need a more aggressive looking tire (future upgrade). The soft rounded street look is just not for me, lol. I like having options off road.

Also as a side note with the exhaust change there is a noticeable increase in the 6th gear power. Not an amazing change, but I am getting more usable power in the gear at cruising speed. So basically I am not slowing down as much going up an incline.
So the Gibson claims of increased torque and Hp are pretty decent.
Thanks again for all the info.

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