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Unread 07-03-2014, 09:43 PM   #1
Eagles77
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Regearing question

I've got 3.73 gears with 34.4" tires and am looking to install 4.88 gears in my 08 2dr 3.8L 6sp. Will I notice a bigger difference on the hwy or in town driving? Maybe both? I do very little hwy driving so that is why I am curious if anyone has a similar set up. Thanks!!

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Unread 07-03-2014, 10:52 PM   #2
Utah_Jay
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Quote:
Originally Posted by Eagles77 View Post
I've got 3.73 gears with 34.4" tires and am looking to install 4.88 gears in my 08 2dr 3.8L 6sp. Will I notice a bigger difference on the hwy or in town driving? Maybe both? I do very little hwy driving so that is why I am curious if anyone has a similar set up. Thanks!!
You will notice a huge difference! Best upgrade I have done yet. It should be the first thing everyone does when they get their 3.8 jk. It is much more driveable both around town and on the highway.
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Unread 07-04-2014, 06:17 AM   #3
HappyTrails
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Here is a recommended gear chart base on tire size for the 3.8L.
According to the chart, you will be going from the yellow to the light blue. Therefore you should notice a significant difference in drivability.
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Unread 07-04-2014, 01:21 PM   #4
Mlaughlin8
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Where did you get that chart??? Any chance you know if there is a chart like that for the 3.6 2012- newer???
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Unread 07-04-2014, 01:28 PM   #5
HappyTrails
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Originally Posted by Mlaughlin8 View Post
Where did you get that chart??? Any chance you know if there is a chart like that for the 3.6 2012- newer???
Got it here:
http://www.jeepforum.com/forum/attac...earratio12.jpg

And here is the chart for the 3.6L:

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Unread 07-04-2014, 04:50 PM   #6
Eagles77
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So I've found someone to install Yukon 4.88 gears for me for $1495 out the door. Jump on it?
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Unread 07-04-2014, 05:41 PM   #7
RockyClymer
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In Denver area that would be a good price for two axles, gears and master install kits...I have seen it as low as $1200, but not sure if they are Yukon or what brand.
Why not do lockers as long as you are paying for breakdown and reassembly?
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Unread 07-04-2014, 06:52 PM   #8
Eagles77
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Debating that. Bumps it up to $3400 and I'm getting dirty looks from the boss.
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Unread 07-05-2014, 06:00 AM   #9
bogleparsons
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Debating that. Bumps it up to $3400 and I'm getting dirty looks from the boss.
lol, how about a lunchbox in the front for only $300 more?
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Unread 07-05-2014, 11:23 AM   #10
Trendsetter75
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Lunch box lockers suck in IMO. Especially in the snow they hook too much making my Jeep slide all over the place. If you going to do it do it right buy spending the money and getting E-Lockers like Eaton where you just flip a switch when you want the lock capability.
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Unread 07-05-2014, 11:43 AM   #11
Jeffro3000
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You can get a pair of tru tracs for under 1K and no extra labor at install. There are haters of the LSD but if its a DD and you are in snow they are great. Combined with the BLD they work great.
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Unread 07-05-2014, 12:47 PM   #12
barnettd
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I switched from the factory 3.21 to 4.10. Huge difference... I am still running on 32s but plan on going to 33-34s. I have an 08 6 speed manual. The chart is pretty accurate for RPMs based on my recent trip. It runs great on highway but you do take an mpg hit.
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Unread 07-05-2014, 05:08 PM   #13
Eagles77
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So does it work better below 3,000 rpms? I live in that zone and it seems to be the struggle with the 3.73 or lower.
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Unread 07-06-2014, 10:18 AM   #14
bogleparsons
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Quote:
Originally Posted by Trendsetter75 View Post
Lunch box lockers suck in IMO. Especially in the snow they hook too much making my Jeep slide all over the place. If you going to do it do it right buy spending the money and getting E-Lockers like Eaton where you just flip a switch when you want the lock capability.
well we don't deal much with the "Devil's Dandruff" here so i can't say for the snow performance.

But in the wheeling I have done mud/rocks dirt, I was VERY satisfied with my Aussie up front 100% traction improvement with no failure.

I don't think buying an air locker or E locker is always doing it right, it's personal preference and budget appropriate subjective.
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Unread 07-06-2014, 11:30 AM   #15
Trendsetter75
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Originally Posted by bogleparsons View Post
well we don't deal much with the "Devil's Dandruff" here so i can't say for the snow performance.

But in the wheeling I have done mud/rocks dirt, I was VERY satisfied with my Aussie up front 100% traction improvement with no failure.

I don't think buying an air locker or E locker is always doing it right, it's personal preference and budget appropriate subjective.
Like I said IMO on the Lunchbox lockers!
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