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Topic Review (Newest First)
09-28-2011 12:02 AM
Bettyrides Thanks, that's great advice. I'll probably try it out stock for a little to see what I think I need.
09-27-2011 09:34 AM
panthermark OP,
Just keep in mind the price gap in what you want vs what you need. If money isn't a concern...don't worry about it.
Looking back at your first post....the Sahara fits your needs, but the Rubi (with 4.10's) is better suited to fit you wants (35's).

Keep in mind that as a daily driver, you will take a hit in city fuel economy if you are running 35's on an unlimited.

In regards to lifts, I've seen the vet posters tell people to wheel it stock first to figure out what they actually need, and what is suitable as a daily driver to someone that is a heavy wheeler may not be suitable to you.

Good Luck!
09-27-2011 05:00 AM
phoenix07013 just using the chart as an aid

if you are definetely going to a larger tire size and would like to stay within the original performance parameters you need a larger gear

in theory, emphasis on theory, the axle ratio and engine speed from factory are balanced for performance and efficiency,

it just follows that if you would like to put on different tires, in your case bigger, you need a larger final ratio to compensate for the larger wheels/tires

again, in addition to the above, if you are going with a tire that will now weigh close to 100 pounds each (yes i realize this is the very upper spectrum of tire weights, bare with me) you will cause undue stress on the d30, so the extra peace of mind of the d44 is nice
09-27-2011 12:02 AM
rics1997 Actually the Manual chart for the 3.8 will work for the manual 3.6. It is exactly the same. The engine makes no difference. It is the transmissions final gear ratio that the charts follows and the 2012 uses the same manual tranny as in the 3.8 models. Saying that the new 5 speed transmission has a very similar final gear to the manual so the 3.8 manual chart will be real close for it too. So forget about the auto chart and just use the Manual chart for both the manual and new auto for the 2012
09-26-2011 11:07 PM
MTH
Quote:
Originally Posted by phoenix07013
IMO Rubi,
the few times you do hit the trails, you'll be happy you have the Rubi features, also the axle ratio will become an issue when towing and off-roading with bigger tires
hope this helps
Quote:
Originally Posted by panthermark
^Keep in mind that the above chart is for the 3.8. The 3.6 auto is geared much shorter than the 3.8 auto.
Quote:
Originally Posted by Bettyrides
Does this gear ratio chart work for the Unlimited Rubi also? The numbers here are different than on other gear ratio charts that I have seen.
That chart works for unlimiteds, but--as Panthermark observed--ONLY the ones with the 3.8 engine. That is to say, starting with the 2012 model year, that chart no longer applies to new jeeps. So it does not apply to the 2012 you're considering.
09-26-2011 11:02 PM
Bettyrides Thanks for all of the advice. I think I'm sold on the Rubi. Does this gear ratio chart work for the Unlimited Rubi also? The numbers here are different than on other gear ratio charts that I have seen.
09-26-2011 11:01 PM
panthermark ^Keep in mind that the above chart is for the 3.8. The 3.6 auto is geared much shorter than the 3.8 auto.
For the new auto:
At 70 MPH, 32 inch wheels on a 4.10 axle will turn 2500 RPM's.
At 70 mph, 35 inch wheels on a 4.10 axle will turn 2300 RPM's.

Both of those put you right in the "green".....
09-26-2011 09:26 PM
phoenix07013 IMO Rubi,
the few times you do hit the trails, you'll be happy you have the Rubi features, also the axle ratio will become an issue when towing and off-roading with bigger tires
hope this helps



Plus as so many have mentioned, the upgraded dana 44 in the front. Yes you won't be doing anything extreme, given that you don't give in to peer pressure, but having the peace of mind of a stronger component is nice
09-26-2011 09:15 PM
moscoeb
Quote:
Originally Posted by kjeeper10

I don't think 2" will cut it without flat fenders, I could be wrong. To fit 35's -comfortably- I believe 2.5 is min.
Yup, I think 2.5 will be best w 35s, and flatties if you want to make sure you have no rubbing.
09-26-2011 08:35 PM
kjeeper10
Quote:
Originally Posted by Bettyrides
I was only thinking Sahara because of the price difference between that and the Rubi. But, I am now leaning toward the Rubi with 4.10. So, if I get the Rubi with 4.10, upgrade my 17" wheels and add 35" tires and 2" spacers for lift, I should be OK? Is that correct?
I don't think 2" will cut it without flat fenders, I could be wrong. To fit 35's -comfortably- I believe 2.5 is min.
09-26-2011 07:10 PM
Bettyrides I was only thinking Sahara because of the price difference between that and the Rubi. But, I am now leaning toward the Rubi with 4.10. So, if I get the Rubi with 4.10, upgrade my 17" wheels and add 35" tires and 2" spacers for lift, I should be OK? Is that correct?
09-26-2011 05:42 PM
Stallion289TX My Rubi is a daily driver, I'm acheiving 17.2mpg combined driving (60% city). If you can live with that and you can stretch the budget, go a head and get the Rubi. It is always great to have a stock Wrangler that can take you places where no other 4x4 can!!!!!! I really can't think of any mods for my Rubi besides Quadratec floor mats!
09-26-2011 05:37 PM
panthermark
Quote:
Originally Posted by Bettyrides View Post
Why are the 35's counter-intuitive to my needs? (I'm still a little ignorant on some of this). Are bigger tires worse for towing? Is that because bigger tires decrease the power at the same gear ratio? Would it be better to go with 33's with 4.10?
Well, the larger (and heavier) a wheel is, the harder it is for the engine to first turn it. So at a given axle ratio, it is usually easier for an engine to turn a smaller wheel. When you add in a 3000 pound trailer, this is even more important. You can make it "easier" to turn the larger wheel by going with a lower (numerically higher) gear ratio. Of course the lower the gear ratio, the worse your mpg will be at higher speeds because you will be turning more RPM's at any given speed. But to make matters more confusing, those higher RPM's can be lowered by going with larger tires (But those larger tires are harder to get started from a standstill...which impacts your city MPG).

If you want to go with larger 35 inch wheels...and you want to tow...you will want the 4.10's....which means the Rubi. And since you need a lift for 35's anyway....the Rubi makes more sense.

Or you could keep your stock wheels and go with 33 inch tires (the tallest you can go without a lift). If you go that route, you should be OK with towing your trailer on 3.73's.

As someone pointed out, you could look at a Sport S with heated seats as a dealer option. It really depends on what you want/need from the Sahara. If you don't want Nav or leather or painted fenders/HT or the saddle interior...you might want to save some cash and get a Sport S. There are some other differences...but none of them seem to be items that people can't live without. (115v outlet, better shocks, hood insulation, automatic headlights, ect....)
09-26-2011 05:21 PM
tomthbomb
Quote:
Originally Posted by kjeeper10 View Post
Another one?
I never get tired of it. Everybody wants another chance to justify their choice of Jeep.
09-26-2011 05:20 PM
glowingghoul Heated mirrors and remote start are nice to have in the winter too, and not available on the Sport.
09-26-2011 05:16 PM
NHRubi 90% street driving and first Wrangler? Why not save big $$$ by ordering a Sport w/3.73s, then purchase the Mopar heated seat components and DIY or pay someone to do it? Many threads here that show you how if you don't mind pulling the seats...
09-26-2011 05:06 PM
glowingghoul If you can afford it, get the Rubicon with 4.10's.

You'll have all the capability of the Sahara and then some, the lower gear ratio will be even better for towing, and you'll be keeping all of your options open for future upgrades without having to start with hardcore mods like regearing. Unpainted fender flares and hard top are far less susceptible to damage even as a DD, and in my opinion do a better job of highlighting the Wrangler's bad ass body lines.

Most importantly, you won't have any regrets down the road.
09-26-2011 04:55 PM
Bettyrides Why are the 35's counter-intuitive to my needs? (I'm still a little ignorant on some of this). Are bigger tires worse for towing? Is that because bigger tires decrease the power at the same gear ratio? Would it be better to go with 33's with 4.10?
09-26-2011 12:48 PM
panthermark Here is your dilemma:

A stock Sahara with 3.73's will be perfect for your needs. The tires, gear ratio, and LSD are exactly what you are looking for (street driving and towing).

"If" you want to run 35's, you will need to lift your Wrangler. You will also want a lower (numerically higher) gear ratio if you want to tow on 35's. That would be the Rubi's 4.10's....with an added benefit of a stronger front axle and the ability to better utilize the lift and tires.

Basically, the 35's that you want for looks are counter-intuitive to your needs...but if guess if you are not going to wheel too hard, you might be able to get away with it.
09-26-2011 12:02 PM
Bettyrides Thanks for the advice. I think my final goal is to have a Jeep that will pull my boat adequately, be capable during moderate off road adventures, and look hot on the street. I don't like the look of the stock Jeeps (sit too low) which is why the bigger tires (with new wheels).

Sounds like most of you think the Sahara will be fine for pulling the boat. If I go with 33's instead of 35's, am I fine staying with the 3.73?
09-26-2011 11:08 AM
panthermark Tough call...
I guess I don't understand your final goal because you it looks like you will spend 90% of your time on the city/highway (Sahara would be fine), but you are also looking for a lift and 35's.
If you were going to keep is stock, I would go with the Sahara (better suited tires, LSD, not paying for equipment you probably wont' need).

If you are going to lift it, and get bigger wheels, I would go with the Rubi (if you are going to lift it and put 35's on it, you might as well set the Jeep up to take advantage of the lift and wheels right out the box)

3.73's on the Sahara will be more than fine for towing your boat.
09-26-2011 10:25 AM
rics1997 Even though Saharas are very capable Jeeps, for the price the Rubi is a lot better deal. The Sahara is more about looks and the Rubi is more for enthusiast. There just isn't as big a difference in price between a Sahara and a Rubi as compared to a Sport and a Rubi.

The biggest thing for you is if your thinking about 35's is the Dana 44 front axle even more then the 4.10 gears. If you go to 35 with the Saharas D33, you will need to gusset and sleeve the axle and they still won't be a D44. I would even gusset the d44 with 35's, cheap protection. 35's are actually very stressful tires and the stronger the axle the better. And yes if your towing on top of 35" tires then the 4.10 gears are really needed if you have no plans to regear anytime soon. An unlocked rear axle on the Rubicon has a torque sensing limited slip design.
09-26-2011 10:23 AM
kjeeper10 Another one?
09-26-2011 10:19 AM
moscoeb The 4.10 gears with auto, bigger tires, and towing will be preferable, but that could be had aftermarket for alot less than the difference between the sahara and the rubi, unless you don't have that extra money lying around and would rather finance it.
You are correct that with what it sounds like you will be doing wheeling wise, the sahara more than meets your needs. The biggest question now is the larger tires and towing.

On a side note, if you do go with the rubi, make sure you upgrade to the 4.10 gears, starting this year, it does NOT come standard.
09-26-2011 10:18 AM
daggo66 You would be better off with the Sahara and a LSD for your driving needs.
09-26-2011 10:17 AM
kik Sahara will be just fine for what you want to do and more. The 3.73's will be fine.
09-26-2011 10:13 AM
Bettyrides
2012 Rubi or Sahara for my needs?

I am about to buy my first Jeep ever, a 2012 Wranger Unlimited, auto. tranny. I can't figure out which model would be best for my needs. I pretty much eliminated the Sport because I want the heated seats for the winter. (I know that's soft, but I spend a lot of time in the mountains in the snow during the winter and I love that feature of my current car).

So....that leaves the Sahara or Rubicon. I will be doing 90% city/hwy. driving, 5% snow driving, and 5% trail driving. This will be my DD. I won't be doing anything extreme off-road like rock crawling, but do want it to be capable to take on some trails or mud. I will be using it to tow my 3,000 lb. boat/trailer. I only tow my boat about 20 miles on flat road, about 10 times per year. I also want to get bigger tires, probably 34 -35's, with a 2 inch lift. I have been leaning toward the Rubi so I could get the 4.10 gearing for towing and accomodate the bigger tires. I am trying to figure out if I really need that, or if I can get away with 3.73 gearing on the Sahara. Do I need 4.10 gears for that small amount of flat towing? Many of the features that make a Rubi a Rubi (Elec. sway bar disconnect, Dana 44 rear, Elec. locking diffs) I don't think I need since I won't be doing hard core wheeling.

So, will the Sahara meet my needs or should I just bite the bullet and get the Rubi? Any advice or recommendations would be great!

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