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Old 08-02-2012, 03:53 PM   #91
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Good find!

I'm glad for the 3.21 owners who are now legal...but still glad I went with 3.73

Thanks for the link!

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Old 08-02-2012, 05:17 PM   #92
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Originally Posted by panthermark View Post
The owner's manual is incorrect. It is still set up for the 2011's. (Notice the lack of 3.21's for an auto which were not available in 2011).

http://www.jeeppr.com/jeep/pdf/2012_...gler_Specs.pdf

If you pull the 2011 owners manual, you will see the same chart that you posted. I emailed Jeep and tried to tell them about the error. The response I got was that 3.21's are not available on 2012's with autos.

??? Someone at Chrysler doesn't know they sold 2012 auto's with 3.21s? Fantastic! I'll take mine back and tell them I shouldn't have 3.21s. They can put in 3.73s!

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Old 08-02-2012, 05:24 PM   #93
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Originally Posted by JeepHerz View Post
??? Someone at Chrysler doesn't know they sold 2012 auto's with 3.21s? Fantastic! I'll take mine back and tell them I shouldn't have 3.21s. They can put in 3.73s!
Dude....I was so pissed when I got that response. I had a thread about it a while ago.

Yeah....I tried to explain to the customer service rep that it looks like the 2012 OM still had the towing chart from the 2011 OM....and I was basically told that since 3.21's with an auto are not on the chart, they are not available for the 2012's.
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Old 08-02-2012, 06:01 PM   #94
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Sometimes I feel like 1st gear is too short, and 6th gear still isn't enough overdrive for 70 MPH travel. Other times I'm glad to have the extra gearing with running the A/C around town (the A/C KILLS the power on these engines for some reason...like, more noticeably than any other vehicle I've owned). It really just depends on the day and where I am going.

But I do think that with 3.21s you would end up staying in 1 - 4 most of the time and you really won't be using the trans. at it's full potential.

I definitely would NOT want 4.11s unless I knew for a fact that I was going to run large tires. I've had 4.11s to 4.88s in other 4x4s and it was a good match...for for the '12 6-speed it would be overkill.

If Jeep still offered a 3.55 it would be the perfect gear for a DD with <=33" tires.
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Old 08-12-2012, 08:39 PM   #95
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3.73 JKU 6spd manual guys, what is your mileage like????
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Old 08-18-2012, 02:36 PM   #96
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Im about to order a 13' JK Auto, and i'm contemplating getting the 3.73 over the 3.21. However I really do not plan on adding a lift kit or over sized tires to my jeep. I do live in NJ so not too many hills, however the only reason why I was thinking this is because sometimes we do get a considerable amount of snow, and I work in the emergency room. So with that being said, even in a state of emergency it is still my duty to go into work no matter how bad the road conditions are. This is one of the reasons why I was contemplating getting the 3.73 gears. Also if I went with the 3.73 gears I understand that my gas mileage would be a little worse, however would it even be noticeable? On the Jeep website they have the rubicon listed at 17/21 MPG along with the Sport S however the rubicon has 4.10 gears in it. So how noticeable would my gas mileage be?
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Old 08-18-2012, 07:37 PM   #97
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Most people w rubicons are reporting 17 hwy. if you aren't going to lift w big tires and offroad a lot then just go w a 3.21, you will save a bundle on fuel costs and will be fine in the winter snow. I offroad a few times a year, tow, and live in a snow region and am ordering a JKU 3.21.
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Old 08-19-2012, 12:27 PM   #98
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Originally Posted by JeepHerz View Post
X2! Thank you for expressing what's also drives me CRAZY. Stupid thing upshifts to 4th right at 38 mph and the RPMs positvely tank. I go from "lively" to "what the heck just happened!". On the freeway its just fine- but city driving feels like a tank.
For those that think buyers are "just clueless" for buying the 3.21s- aren't you just special and omniscient. EVERY salesman I spoke to heard the same spiel from me- "I will be upgrading the wheels & tires"- and not one mentioned the gearing. Little did I know they'd sell a Jeep with a gear ratio only intended for stock skinnies. They all sold 3.73s as "only needed for towing". I figured the 80 extra HP and 5 speed tranny were all I needed. I researched my lift and tires out the wazoo before I bought. Forgive me for not stumbling onto the Jeep Gear chart or for not having Googled "Are stock 3.21 gears a problem on a 2012 Jeep" in advance of my purchase. Shame on me for not remembering the gear ratio on my TJ from 1998. Jeep shouldn't be selling these with 3.21s to start, their salespeople should know the difference, and the 24S package should automatically bump you into 3.73s. The highly modifiable/very often modified Jeep should be the last vehicle you should be worried about in terms of gearing and/or tire changes. Someone else has said it- and I don't mean to insult all the 3.21s owners out there (myself included)- 3.21s shouldn't be stock on a Jeep to begin with. And you shouldn't have to sign onto a Jeep forum to know it.
(No, I am not bitter.)
Right on! I am one of those "clueless" guys that ended up with the 3.21 and having a bad case of regrets. Especially as I almost bought one from another dealer with the Max Tow group and the 3.73. And it is purely ego driven and the comments on these forums about being clueless, stupid, and having a gutless 3.21 that is making me feel this way. Grateful for the other comments from those a lot more knowegeable than me reassuring that the 3.21 will suit me fine for my lifestyle and use of my Jeep. It's my first one and I love it and don't want to have any regrets.
I am pissed at the salesman though and intend to give the dealership a hard time and ask that they consider a really smoking deal on regearing in the future. I think they will. I did get this one almost $2K less than the one with the 3.73 that I was looking at, so I will likely regear in the future when I need now tires.
But I love my new Jeep. It as an impulse buy (hence the lack of homework) but it was that same implulse that got me into rather than a Ford Escape.
I am so happy my Jeep! So thanks again to this forum for alleviating my post "did I make a big mistake for getting a 3.21" blues.
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Old 08-19-2012, 12:54 PM   #99
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Originally Posted by ekbergman
3.73 JKU 6spd manual guys, what is your mileage like????
I average about 19.8 with 22 mpg being my best tank
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Old 08-19-2012, 01:02 PM   #100
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Originally Posted by TopTomato View Post
Im about to order a 13' JK Auto, and i'm contemplating getting the 3.73 over the 3.21. However I really do not plan on adding a lift kit or over sized tires to my jeep. I do live in NJ so not too many hills, however the only reason why I was thinking this is because sometimes we do get a considerable amount of snow, and I work in the emergency room. So with that being said, even in a state of emergency it is still my duty to go into work no matter how bad the road conditions are. This is one of the reasons why I was contemplating getting the 3.73 gears. Also if I went with the 3.73 gears I understand that my gas mileage would be a little worse, however would it even be noticeable? On the Jeep website they have the rubicon listed at 17/21 MPG along with the Sport S however the rubicon has 4.10 gears in it. So how noticeable would my gas mileage be?
Your gas mileage could be anywhere regardless of what gearing- there are so many factors involved. Tires, how you drive, weight etc. If you get 3.21s but mash the gas to eek out any speed you may have.....there goes your gas mileage. The difference could be nothing.....or maybe 2 mpg? At least drive different-geared Jeeps back to back. Then decide how important that mpg is- and do the math. 15k a year at 18 mpg vs 15k @ 16....@ $4 a gallon. $36 a month. And that's just an estimate again because of all the factors that affect mpg.
A friend of mine traded in a car for a new one just because of the "rated" mpg on the sticker- and she lost money on the trade. And now she is upset because shockingly she isn't getting the mpg on the window sticker. So she lost money on the trade AND she isnt saving that much money on gas. Don't let mpg give you tunnel vision.
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Old 08-19-2012, 10:14 PM   #101
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Installed my 285s on Friday (which are more like 32s) and the only difference I noticed in my 3.21 geared Jeep is that it doesn't coast in idle as quickly (meaning letting off the brake the Jeep doesn't start forward as fast). Otherwise it still has the same balls it had on the stock baby steelies. That being said I'd still order 3.73s given the opportunity just to have more pickup off the line.
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Old 08-19-2012, 10:32 PM   #102
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Quote:
Originally Posted by ekbergman
3.73 JKU 6spd manual guys, what is your mileage like????
I get 18.5 average in city/countryside, 22 hwy. Still have stock tires on. Just installed ARB front and rear bumpers, rock sliders and winch this week so we'll see how the ~250 lbs affect it. But to be honest I couldn't really care less if I got 17 or 18.5 mpg. With my average of 10000 miles a year it would make up for a difference of roughly $200 a year. I would say that's worth it for some useful accessories!

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