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

Running 38's

Thread Tools
 
Old Oct 9, 2010 | 09:12 AM
  #11  
Rubican's Avatar
JK Enthusiast
 
Joined: Sep 2010
Posts: 254
Likes: 1
From: Virginia Beach, Virginia, United States
Default

Originally Posted by wayoflife
in a dana 44, what you get with a rubicon, the pinion on a 5.38 gets to be really really small. under normal conditions, this is no big deal. if you only do light wheeling without a lot of stress being placed on your drivetrain components, no big deal. but, if you run larger tires like 37's or bigger and wheel hard and a lot like i do, the stresses placed on this really really small pinion can be enough to break it. with 5.13's, the pinoin is bigger and the chances of breaking one would be less. does this make sense.
Yeah I understand that part. I am just asking if running 40's on 5.13 is good or should I stick with 37's until I can upgrade my axles to D60's.

The wife has said I can most likely get my Rubi at the beginning of the year so I will be a full on JK'er then. She also knows I want to get my 6" LA and tires right away. She's so awesome, she's excited too.
Reply
Old Oct 9, 2010 | 09:18 AM
  #12  
wayoflife's Avatar
JK-Forum Founder
 
Joined: Jul 2006
Posts: 36,534
Likes: 16
From: Laguna Niguel, CA
Default

Originally Posted by Rubican
Yeah I understand that part. I am just asking if running 40's on 5.13 is good or should I stick with 37's until I can upgrade my axles to D60's.

The wife has said I can most likely get my Rubi at the beginning of the year so I will be a full on JK'er then. She also knows I want to get my 6" LA and tires right away. She's so awesome, she's excited too.
honestly, even if the r&p can hold out, if you want to run 40's, i would get a d60
Reply
Old Oct 9, 2010 | 09:21 AM
  #13  
Rubican's Avatar
JK Enthusiast
 
Joined: Sep 2010
Posts: 254
Likes: 1
From: Virginia Beach, Virginia, United States
Default

Originally Posted by wayoflife
honestly, even if the r&p can hold out, if you want to run 40's, i would get a d60
37's with 5.13 it is. Gotta work on the wife for the justification of D60. She handles all the funds so gotta spread this all out to get my toys. :P
Reply
Old Oct 9, 2010 | 12:19 PM
  #14  
JKCruise's Avatar
Thread Starter
JK Newbie
 
Joined: Sep 2010
Posts: 17
Likes: 0
From: Mountains
Default

Originally Posted by wayoflife
yes, 5.13's will. you could go 5.38's but, i wouldn't recommend it due to how small the pinion gets on the 44.

Ok good info... Thanks, I'm leaning towards the TeraFlex 6" long arm, Does anyone have this set up ( W/38's ) so I could see some pics. I'm also concerned about rubbing.

Is it unreasonable to DD this kind of rig? I drive about 50 miles per day.. Can the stock Rubi drive line really take this. Anything else I should change or strengthen.
Reply
Old Oct 9, 2010 | 04:51 PM
  #15  
Steel Rain's Avatar
JK Enthusiast
 
Joined: Aug 2009
Posts: 367
Likes: 0
From: La Quinta, Ca.
Default

Originally Posted by JKCruise
Ok good info... Thanks, I'm leaning towards the TeraFlex 6" long arm, Does anyone have this set up ( W/38's ) so I could see some pics. I'm also concerned about rubbing.

Is it unreasonable to DD this kind of rig? I drive about 50 miles per day.. Can the stock Rubi drive line really take this. Anything else I should change or strengthen.
With a 6" lift you will need to go aftermarket drive shafts front and rear
Reply
Old Oct 9, 2010 | 04:58 PM
  #16  
wayoflife's Avatar
JK-Forum Founder
 
Joined: Jul 2006
Posts: 36,534
Likes: 16
From: Laguna Niguel, CA
Default

Originally Posted by JKCruise
Ok good info... Thanks, I'm leaning towards the TeraFlex 6" long arm, Does anyone have this set up ( W/38's ) so I could see some pics. I'm also concerned about rubbing.

Is it unreasonable to DD this kind of rig? I drive about 50 miles per day.. Can the stock Rubi drive line really take this. Anything else I should change or strengthen.
Originally Posted by Steel Rain
With a 6" lift you will need to go aftermarket drive shafts front and rear
being that you have an unlimited, you should be able to get away running the rear shaft for a while but, i probably would recommend upgrading to a new aftermarket u-joint style shaft. up front, being that you have an auto, you will definitely need a new shaft. aside from that, yeah, if you haven't done so already, i would gussett up your front axle c's and install chromo shafts. sleeving the housing isn't a bad idea either. of course, if you have the cash, i would go straight to d60's but, that's only if you have the cash.
Reply
Old Oct 9, 2010 | 05:00 PM
  #17  
Castalone's Avatar
JK Enthusiast
 
Joined: Dec 2009
Posts: 297
Likes: 0
From: San Marcos, So Cal
Default

Originally Posted by JPop
I'd spend $75-100 and take the appropriate gear set to a Cryo Shop and have them treated.
What does this mean? I really want 5.38s if safely possible!
Reply
Old Oct 9, 2010 | 05:36 PM
  #18  
JPop's Avatar
JK Junkie
 
Joined: Jul 2008
Posts: 3,017
Likes: 0
From: Lakewood, OH
Default

Originally Posted by Castalone
What does this mean? I really want 5.38s if safely possible!
Cryogenic treating of steel parts hardens them by changing the molecular structure. As the steel cools (to below -185 degrees) the molecular structure contracts and minimizes areas prone to stress fractures. The end result is longer part life, greater resistance to fractures and better stability through heat cycles.

The process has been used for a long time on different performance automotive parts, such as pistons, rings, connecting rods and valve springs. Claims of 5x or more the part life has been claimed and it's a pretty much standard process for many parts in F1 cars before the parts are machined.

There are lots of shops that perform the service and it's not all that expensive. It has lots of industrial applications and certainly the serious racing crowd is all over taking critical parts in for treatment.
Reply
Old Oct 10, 2010 | 04:08 AM
  #19  
JKCruise's Avatar
Thread Starter
JK Newbie
 
Joined: Sep 2010
Posts: 17
Likes: 0
From: Mountains
Default

Originally Posted by wayoflife
being that you have an unlimited, you should be able to get away running the rear shaft for a while but, i probably would recommend upgrading to a new aftermarket u-joint style shaft. up front, being that you have an auto, you will definitely need a new shaft. aside from that, yeah, if you haven't done so already, i would gussett up your front axle c's and install chromo shafts. sleeving the housing isn't a bad idea either. of course, if you have the cash, i would go straight to d60's but, that's only if you have the cash.
Thanks for the info. I will defiantly do the shafts and reinforce the front axel. I had an 07 Unlimited Rubi but sold it before I had the chance to mod it. Before that I had a TJ with a 360 conv, 1500 trans full width axels, Ford 9in rear and 38 Boggers... did some great wheeling. What I regret is being able to daily drive it so this time I'm going for the best of both worlds. I don't want to trailer this thing when it's soooo much fun to cruise to & from the trails.

Reply
Old Oct 10, 2010 | 09:47 AM
  #20  
doug42's Avatar
JK Newbie
 
Joined: Sep 2010
Posts: 8
Likes: 0
From: Fairplay,Co.
Smile

I agree I like to drive to the trails. But when I do I ussually drive more restricted on the hard obstacles. When I trailer to the trail I seem to have a lot more fun trying the top(optional) obstacles.But I have limbed back to the trailer broken and a passanger if there are more days left in the event.Both have there advantages.
Reply




All times are GMT -8. The time now is 09:59 PM.