Notices
Modified JK Tech Tech related bulletin board forum regarding subjects such as suspension, tires & wheels, steering, bumpers, skid plates, drive train, cages, on-board air and other useful modifications that will help improve the performance and protection of your Jeep JK Wrangler (Rubicon, Sahara, Unlimited and X) on the trail.

PLEASE DO NOT START SHOW & TELL TYPE THREADS IN THIS FORUM

Gearing for 37s

Thread Tools
 
Old May 19, 2014 | 05:54 PM
  #1  
Rebel Ruby-Jk's Avatar
Thread Starter
JK Newbie
 
Joined: Mar 2014
Posts: 85
Likes: 0
Default Gearing for 37s

IM planning on moving up to 37s in the near future right now I have stock 3.21 gearing with 34inch nitto trail grapplers keep in mind this is my daily driver being that I am 16 but Im choosing between 4.88 or 5.13 don't want it geared to much or geared to low
Reply
Old May 19, 2014 | 05:58 PM
  #2  
DadsCJ's Avatar
JK Freak
Veteran: Air Force
 
Joined: Nov 2006
Posts: 991
Likes: 1
From: Archer, Florida
Default

Depends on what year and auto or manual?
Reply
Old May 19, 2014 | 05:58 PM
  #3  
Rebel Ruby-Jk's Avatar
Thread Starter
JK Newbie
 
Joined: Mar 2014
Posts: 85
Likes: 0
Default

Originally Posted by DadsCJ
Depends on what year and auto or manual?
auto and forgot to mention its a 3.8 too
Reply
Old May 19, 2014 | 06:01 PM
  #4  
Rambo JK's Avatar
JK Newbie
 
Joined: Apr 2014
Posts: 89
Likes: 0
From: Loganville GA
Default

Originally Posted by Rebel Ruby-Jk
IM planning on moving up to 37s in the near future right now I have stock 3.21 gearing with 34inch nitto trail grapplers keep in mind this is my daily driver being that I am 16 but Im choosing between 4.88 or 5.13 don't want it geared to much or geared to low
I have 305/70/17 and 4.88's with auto. If I was going to run 37's I would do the 5.13.
Reply
Old May 19, 2014 | 06:03 PM
  #5  
JKJon's Avatar
JK Enthusiast
 
Joined: Jan 2011
Posts: 293
Likes: 0
From: Grapevine Texas
Default

Just went with 5.13 gearing on my manual 3.8L its great!
Reply
Old May 19, 2014 | 06:45 PM
  #6  
Smashboogie 4x4's Avatar
Former Vendor
 
Joined: Oct 2012
Posts: 1,615
Likes: 0
From: Newton, NJ
Default

With a 3.8 auto I would agree with the rest of the folks who commented and say 5.13's for sure.
Reply
Old May 19, 2014 | 06:59 PM
  #7  
Wrangler22's Avatar
JK Newbie
 
Joined: Oct 2011
Posts: 87
Likes: 0
From: Lafayette, LA
Default

Originally Posted by Rebel Ruby-Jk
IM planning on moving up to 37s in the near future right now I have stock 3.21 gearing with 34inch nitto trail grapplers keep in mind this is my daily driver being that I am 16 but Im choosing between 4.88 or 5.13 don't want it geared to much or geared to low
I changed my gears from 3.73 to 5.13 and all I can say is WOW! Planning on 37's in the future as well. I wouldn't think twice about doing it again.
Reply
Old May 19, 2014 | 07:03 PM
  #8  
JKingAround's Avatar
JK Super Freak
 
Joined: May 2012
Posts: 1,385
Likes: 0
From: Grant Florida
Default

I went with 5:38s with my 37s turned it into a beast

Click image for larger version

Name:	image-2637510347.jpg
Views:	133
Size:	102.3 KB
ID:	554269
Reply
Old May 19, 2014 | 07:04 PM
  #9  
4wpjeep's Avatar
JK Enthusiast
 
Joined: May 2012
Posts: 173
Likes: 0
From: mesquite tx
Default

I have 5.38's on 37/12.50/18's at 80mph I'm at 2500 Rpms an automatic


Sent from my iPhone using Tapatalk
Reply
Old May 19, 2014 | 07:23 PM
  #10  
Wrangler428's Avatar
JK Enthusiast
 
Joined: Mar 2012
Posts: 235
Likes: 2
From: Auburn, WA
Default

I have the 3.8 and 35's and just got 5.13 gears and it is great, but I think if I was planning on 37's I would go with 5.38's. Just my opinion, of course.
Reply



All times are GMT -8. The time now is 10:19 AM.