regear or not to regear a 2012??? Here's the answer
10-24-2012, 01:06 PM
#4
I would not regear the new drivetrain. I had 37s on my 12 jkur with auto and 4.10. Power was good, mpg was great and i never downshifted on the interstate. Dont know what else you can ask for in a jeep
10-24-2012, 02:20 PM
#5
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I have a 2012 JKUR auto, 35" KM2's, and had 4.10's stock. I drove it this way for 3-4 months and it was OK, but the power wasn't what it was stock. Even properly calibrated with a Procal, it never felt like it was in the right gear and the tranny was constantly hunting for the "sweet spot".
I had it regared to 4.88's and WOW! It's much more drivable, especially around town, and the tranny isn't always shifting between gears to find the "right" RPM.
Sure, the 3.6 has enough power to pull the 35's without being re-geared, but why sacrifice the power? Re-gear it and get back the power you've been missing
I had it regared to 4.88's and WOW! It's much more drivable, especially around town, and the tranny isn't always shifting between gears to find the "right" RPM.
Sure, the 3.6 has enough power to pull the 35's without being re-geared, but why sacrifice the power? Re-gear it and get back the power you've been missing
10-24-2012, 02:34 PM
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Originally Posted by mattgt5
I would not regear the new drivetrain. I had 37s on my 12 jkur with auto and 4.10. Power was good, mpg was great and i never downshifted on the interstate. Dont know what else you can ask for in a jeep
I do have a 2012 JKU with 37's and 4:10's. is it live able until I can afford to regear? Sure. Do I want my stock performance back? Hell yea I do.
I want my crawl ratio back Offroad as well. We have regeared enough 2012's to tell you it'll make a difference. Not to mention save your drivetrain from being over worked.
Last edited by chris@offroadevolution; 10-24-2012 at 03:02 PM.
10-24-2012, 02:46 PM
#7
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Originally Posted by chris@offroadevolution
To have to back to stock performance..
I I do have a 2012 JKU with 37's and 4:10's. is it live able until I can afford to regear? Sure. Do I want my stock performance back? Hell yea I do.
I want my crawl ratio back Offroad as well. We have regeared enough 2012's to tell you it'll make a difference. Not to mention save your drivetrain from being over worked.
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10-24-2012, 03:11 PM
#8
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Originally Posted by rb1boxer_3
Ok so 2012 auto with 37s your saying 5.13s would be perfect. I was going to do 4.56 cause people where saying with 4.88s at 70 they where almost at 3000
Yellow is minimum, green is acceptable and blue is performance... 4.88s and 5.13s are pretty close, just depends how much crawling u plan on doing vs daily driving...
10-24-2012, 03:25 PM
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10-24-2012, 04:04 PM
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Originally Posted by Atlacatl
<img src="https://www.jk-forum.com/forums/attachment.php?attachmentid=382033"/>
Yellow is minimum, green is acceptable and blue is performance... 4.88s and 5.13s are pretty close, just depends how much crawling u plan on doing vs daily driving...
Originally Posted by chris@offroadevolution
as mentioned the difference between 4.88's and 5.13's is minimal. I would go with 5.13's