gearing charts for 07 and UP! Jk's - JeepForum.com

 
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post #1 of 14 Old 12-05-2012, 05:55 PM Thread Starter
awinski
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gearing charts for 07 and UP! Jk's

well i don't know if these have their own thread yet, but i've been seeing a lot of gearing questions lately so i thought id share. these are not mine, and opinions may differ but a lot of referrals have been made to these charts and i know many people that trust them. they are as follows: 3.8 auto, manual. followed by 3.6 auto then manual. hope these help guys

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JKgearing.jpg   '12 gear chart.jpg  

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post #2 of 14 Old 12-05-2012, 05:57 PM
Crayzjeep
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Thanks

Thanks
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post #3 of 14 Old 12-05-2012, 05:59 PM Thread Starter
awinski
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they've been saved on my desktop forever, thought id finally share, btw i found these years ago by simply googling

The ONLY chlorophyll JK
one more horse power than the average pentastar;
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post #4 of 14 Old 12-05-2012, 06:01 PM
Crayzjeep
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These have helped me a lot. Going to get a 2013 and wanted to look at how much the rubi 4.1 could do! 35s seem like they will be fine
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post #5 of 14 Old 12-06-2012, 03:14 AM
TheBoss
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These are in the F.A.Q section on the top of the page. It seems to be a very elusive and difficult area for newcomers, but thanks for sharing it.
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post #6 of 14 Old 12-06-2012, 01:17 PM Thread Starter
awinski
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i figured they were some where, im just tired of newbs not using the faq section, thought maybe if they saw the title it would stop the creation of one more useless thread

The ONLY chlorophyll JK
one more horse power than the average pentastar;
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post #7 of 14 Old 12-06-2012, 01:24 PM
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Will I be OK with 35s and 3.21 gears? LOL.
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post #8 of 14 Old 12-06-2012, 03:15 PM Thread Starter
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Quote:
Originally Posted by ncb View Post
Will I be OK with 35s and 3.21 gears? LOL.
when people ask these questions from now on, im gonna make a reference to this chart, with out awaring them. "bro, thats not even in the yellow" they'd be so confused

The ONLY chlorophyll JK
one more horse power than the average pentastar;
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post #9 of 14 Old 12-06-2012, 05:47 PM
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Quote:
Originally Posted by awinski View Post
i figured they were some where, im just tired of newbs not using the faq section, thought maybe if they saw the title it would stop the creation of one more useless thread
Wow.
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post #10 of 14 Old 12-07-2012, 06:23 PM Thread Starter
awinski
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yes i realize its highly hypocritical, but when i got here months ago, i read the faq's section, back then there was no chart for the '12, and even now they are in different threads so i thought i would just make it easy and put both in the same thread.

The ONLY chlorophyll JK
one more horse power than the average pentastar;
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post #11 of 14 Old 12-07-2012, 06:56 PM
Jrdchiropractic
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Any idea of the RPM's at 70mph w 32" w 4.10
'09 JK X manual 3.8
Also, what do I shop for. Looking in 4WD or Quadratec catalogs I'm not sure of what I'm actually buying to regear? Is it the ring and pinion sets I see, or can it be done by adding a locker w different gears. This is one area I know little about. Can I buy a regeared locker for one diff (rear only?) and then regear the front diff?

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post #12 of 14 Old 12-07-2012, 10:29 PM Thread Starter
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best thing to do is a lot of research, yes a regear is the ring and pinion in the diff, some can do this in the garage, but it is a special "skill" i guess you could say to get it right, so probably best to have a shop do it. you can add lockers, but they are sold separate from the ring and pinion usually, imo if your going to get a regear done, might as well save up till you have money for the lockers too, get it all done at once and save up on labor costs. sorry but i have no idea what the rpms are for the 3.8

The ONLY chlorophyll JK
one more horse power than the average pentastar;
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post #13 of 14 Old 12-08-2012, 07:17 AM
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Quote:
Originally Posted by Jrdchiropractic
Any idea of the RPM's at 70mph w 32" w 4.10
'09 JK X manual 3.8
Also, what do I shop for. Looking in 4WD or Quadratec catalogs I'm not sure of what I'm actually buying to regear? Is it the ring and pinion sets I see, or can it be done by adding a locker w different gears. This is one area I know little about. Can I buy a regeared locker for one diff (rear only?) and then regear the front diff?

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The chart up top in this post has RPM.
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post #14 of 14 Old 12-08-2012, 10:48 AM
Jrdchiropractic
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I get it. I was looking at the colors, and not even noticing the rpm figures. Thx

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09 JK w/ a winch and duratracs
Just enough to get through most of the time,
get stuck sometimes, and still get home
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