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Old 10-19-2013, 10:12 AM   #271
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Originally Posted by ohioviper View Post
Its all a matter of opinion. In your opinion you feel that 33s and 3:73s on the new 3.6 are geared to tall. Most will disagree with you. Fact is most find 33s to be just fine with even the 3:21. It offers plenty of zip and decent mpg for a DD and 4L will tame any offroad situation. I would think only a select few that strictly off road would feel the need for lower gears than the 3:73 on a set of 33s.

Right on...

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Old 10-19-2013, 11:02 AM   #272
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I didn't read through all 10 pages of this apparently meandering thread, but in case it's not covered: The appropriateness of 3.73s on your Jeep depends, in part, on the year of the JK.

2012+ Auto JKs have a 1st-gear ratio that is 26.4% lower than the 1st-gear ratio on the 2011 JKs (3.59:1 vs. 2.84:1).

That means (forgetting any Pentastar difference) that, in 1st gear, the 2012 JK Auto with 3.73 gears is geared as low as a 2011 with 4.71:1 gearing if such a thing existed (i.e., lower than 4.56 gears and getting close to 4.88s).

Interestingly, the 2012+ Auto gearing remains lower across the spectrum. For example, the top gear on the 2012+ JK (5th gear) is 20.3% lower than the top gear on the 2011 JK (4th gear) (0.83:1 vs. 0.69:1).

So, a 2012+ JK with 3.73:1 gears is geared like a pre-2012 JK with something like 4.56:1 gears.

Not sure if people realize that the Pentastar might not be the main difference between the pre-2012 JKs than the current models.

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Old 10-19-2013, 11:16 AM   #273
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Originally Posted by MarineHawk View Post
I didn't read through all 10 pages of this apparently meandering thread, but in case it's not covered: The appropriateness of 3.73s on your Jeep depends, in part, on the year of the JK.

2012+ Auto JKs have a 1st-gear ratio that is 26.4% lower than the 1st-gear ratio on the 2011 JKs (3.59:1 vs. 2.84:1).

That means (forgetting any Pentastar difference) that, in 1st gear, the 2012 JK Auto with 3.73 gears is geared as low as a 2011 with 4.71:1 gearing if such a thing existed (i.e., lower than 4.56 gears and getting close to 4.88s).

Interestingly, the 2012+ Auto gearing remains lower across the spectrum. For example, the top gear on the 2012+ JK (5th gear) is 20.3% lower than the top gear on the 2011 JK (4th gear) (0.83:1 vs. 0.69:1).

So, a 2012+ JK with 3.73:1 gears is geared like a pre-2012 JK with something like 4.56:1 gears.

Not sure if people realize that the Pentastar might not be the main difference between the pre-2012 JKs than the current models.
Thanks for that info. I guess that would also help explain why 3.21s and an auto are still very acceptable, and standard equipment on my 2013 Sport S, with 255/75R17s (32s)
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Old 10-19-2013, 12:15 PM   #274
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Originally Posted by MarineHawk View Post
I didn't read through all 10 pages of this apparently meandering thread, but in case it's not covered: The appropriateness of 3.73s on your Jeep depends, in part, on the year of the JK. 2012+ Auto JKs have a 1st-gear ratio that is 26.4% lower than the 1st-gear ratio on the 2011 JKs (3.59:1 vs. 2.84:1). That means (forgetting any Pentastar difference) that, in 1st gear, the 2012 JK Auto with 3.73 gears is geared as low as a 2011 with 4.71:1 gearing if such a thing existed (i.e., lower than 4.56 gears and getting close to 4.88s). Interestingly, the 2012+ Auto gearing remains lower across the spectrum. For example, the top gear on the 2012+ JK (5th gear) is 20.3% lower than the top gear on the 2011 JK (4th gear) (0.83:1 vs. 0.69:1). So, a 2012+ JK with 3.73:1 gears is geared like a pre-2012 JK with something like 4.56:1 gears. Not sure if people realize that the Pentastar might not be the main difference between the pre-2012 JKs than the current models.
In other words: Jeep designed the 2012+ gears to be more "mod-friendly" as far as light modification goes.
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Old 10-19-2013, 12:32 PM   #275
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In other words the OP is full of bologna.
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Old 10-19-2013, 09:18 PM   #276
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Originally Posted by MarineHawk View Post
I didn't read through all 10 pages of this apparently meandering thread, but in case it's not covered: The appropriateness of 3.73s on your Jeep depends, in part, on the year of the JK.

2012+ Auto JKs have a 1st-gear ratio that is 26.4% lower than the 1st-gear ratio on the 2011 JKs (3.59:1 vs. 2.84:1).

That means (forgetting any Pentastar difference) that, in 1st gear, the 2012 JK Auto with 3.73 gears is geared as low as a 2011 with 4.71:1 gearing if such a thing existed (i.e., lower than 4.56 gears and getting close to 4.88s).

Interestingly, the 2012+ Auto gearing remains lower across the spectrum. For example, the top gear on the 2012+ JK (5th gear) is 20.3% lower than the top gear on the 2011 JK (4th gear) (0.83:1 vs. 0.69:1).

So, a 2012+ JK with 3.73:1 gears is geared like a pre-2012 JK with something like 4.56:1 gears.

Not sure if people realize that the Pentastar might not be the main difference between the pre-2012 JKs than the current models.
Very well stated!
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Old 10-19-2013, 09:42 PM   #277
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Very well stated!
Thanks. And, if you have an after market transfer case or, in my case a Rubi, that can matter for the offroad needs. My transfer case drops the gearing by a factor of 4:1 in low range. That's a 46.5% difference over the 2.73:1 normal transfer case low-range ratio. So, if my 2012 Rubi with 3.73s is geared like a pre-2012 JK with 4.56:1 gears (it is). It's like me having 6.68 gears (crazy) in 4-low compared to a pre-2012 non-Rubi with a 2.73:1 transfer case in 4-low. It's definitely really low in 4-low. There are a lot of variables, but the 2012+ JKs are geared a lot lower than the pre-2013 JKs. And low enough for off-roading in 4-low unless you have really gargantuan tires.

The much lower gearing on the 5-speed 2012+ transmission makes a big difference across the board--forgetting even entirely the engine differences.
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Old 10-19-2013, 09:48 PM   #278
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Very well stated!
BTW, go Jayhawks, with Tharpe, Wiggins, Selden, Ellis, etc ...!

(I grew up in KS and went to KU undergrad).
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Old 10-20-2013, 07:16 AM   #279
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You can wear a dress to a Drag Queen event and call yourself a lady ... but your Adam's Apple gives you away. Still look pretty though ...
I'm not going to lie....you were on your own from here on out.
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Old 10-20-2013, 07:33 AM   #280
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BTW, go Jayhawks, with Tharpe, Wiggins, Selden, Ellis, etc ...!

(I grew up in KS and went to KU undergrad).
Always glad to talk to another Kansan and I won't hold being a Jayhawk fan against you. I've been a Shocker fan for 20 years so last year was pretty special!
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Old 10-20-2013, 12:54 PM   #281
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Always glad to talk to another Kansan and I won't hold being a Jayhawk fan against you. I've been a Shocker fan for 20 years so last year was pretty special!
I lived in Derby from 1974-86, and my mom graduated from WSU. I was happy for the Shockers last year.
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Old 10-20-2013, 01:17 PM   #282
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I'm getting the jk rubicon x so an leaving it stock so no gearing problems for me
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Old 10-20-2013, 01:21 PM   #283
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Originally Posted by MarineHawk View Post
Thanks. And, if you have an after market transfer case or, in my case a Rubi, that can matter for the offroad needs. My transfer case drops the gearing by a factor of 4:1 in low range. That's a 46.5% difference over the 2.73:1 normal transfer case low-range ratio. So, if my 2012 Rubi with 3.73s is geared like a pre-2012 JK with 4.56:1 gears (it is). It's like me having 6.68 gears (crazy) in 4-low compared to a pre-2012 non-Rubi with a 2.73:1 transfer case in 4-low. It's definitely really low in 4-low. There are a lot of variables, but the 2012+ JKs are geared a lot lower than the pre-2013 JKs. And low enough for off-roading in 4-low unless you have really gargantuan tires.

The much lower gearing on the 5-speed 2012+ transmission makes a big difference across the board--forgetting even entirely the engine differences.
My calculator says that the stock transfer case gearing is 68% of the Rubicons 4:1. That would make a 32% difference. Unless I'm missing something.
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Old 10-20-2013, 01:52 PM   #284
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My calculator says that the stock transfer case gearing is 68% of the Rubicons 4:1. That would make a 32% difference. Unless I'm missing something.
Nope. 4.0/2.73 = 1.465. If something is 1.465 greater than something else, it's 46.5% greater. Of course, the smaller thing is 68% as big as the larger one. But the larger one is 46.5% larger.

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