5.13 or 5.38 for 37" automatic

Reply Subscribe

Thread Tools

06-01-2012 | 08:30 AM

#11

wayoflife

JK-Forum Founder

Joined: Jul 2006

Posts: 36,534

Likes: 16

From: Laguna Niguel, CA

Quote:

Originally Posted by chris@offroadevolution

What year is your JK? the new 2012 does not need as much of a gear or any at all.

agreed. running 37" nitto trail grapplers on our 12 with an auto and 4.10 gears and feel no need to regear.

Reply Like

06-01-2012 | 10:30 AM

#12

bigbluejk

JK Jedi

Joined: Apr 2008

Posts: 5,168

Likes: 1

From: texarkana,tx

Wow that is pretty impressive power in the 12's

Reply Like

06-01-2012 | 11:05 AM

#13

V00D0013

Thread Starter

JK Enthusiast

Joined: Aug 2011

Posts: 118

Likes: 0

From: Afghanistan, Pennsylvania

It's an 07 rubi. I do a fare share of off roading but what makes it worse is now I am going to be tugging a 2000+ trailer/ base camp.

Reply Like

06-01-2012 | 11:06 AM

#14

V00D0013

Thread Starter

JK Enthusiast

Joined: Aug 2011

Posts: 118

Likes: 0

From: Afghanistan, Pennsylvania

By the way thanks guys, keep 'em coming. How much did u guys spend for gears and install kits?

Reply Like

06-01-2012 | 11:08 AM

#15

bigbluejk

JK Jedi

Joined: Apr 2008

Posts: 5,168

Likes: 1

From: texarkana,tx

superior gears with bearings and install stuff plus labor was $1250ish for me.

Reply Like

06-01-2012 | 11:17 AM

#16

bsharp704

JK Enthusiast

Joined: Mar 2010

Posts: 187

Likes: 0

From: Grant, MI

Quote:

Originally Posted by wayoflife

for most people, 5.38 is definitely a good ratio to go with but, the pinion is really really small in a dana 44 and, if you wheel hard and often, a 5.13's will be a lot stronger and a better option to go with. granted, i was running 40's at the time but, when i ran 5.38's in my factory 44, i soon found myself wishing i had stuck with 5.13's.

Correct but you also had a manual, i believe the OP has an automatic. That alone will make a big performance difference.

Reply Like

06-01-2012 | 11:21 AM

#17

BadPunkin

JK Super Freak

Joined: Nov 2010

Posts: 1,575

Likes: 0

From: NE, Ohio

5.38s in my 6 speed with 37 Toyos and I am happy. I only went to the 5.38s for towing otherwise 5.13s all the way. If they break, they break. You have to pay to play

Reply Like

06-01-2012 | 12:38 PM

#18

wayoflife

JK-Forum Founder

Joined: Jul 2006

Posts: 36,534

Likes: 16

From: Laguna Niguel, CA

Quote:

Originally Posted by bsharp704

Correct but you also had a manual

meaning?

Quote:

i believe the OP has an automatic. That alone will make a big performance difference.

as i have said, 5.38 is a good ratio and one that most people will never have a problem with. but, it doesn't change the fact that the pinion is really really small and will be a weak point.

Reply Like