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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.

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Mods to run 40s

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Old 04-13-2011 | 11:30 AM
  #21  
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WOL
What chromo shafts would you recommend?
Old 04-13-2011 | 11:39 AM
  #22  
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Originally Posted by Monte417
WOL
What chromo shafts would you recommend?
superior is a sponsor here and so, i might recommend them but, i have also run alloy usa shafts in the past and have found them to work out well too. i understand that ten factory has some nice shafts as well an, when they come out, the foote front shafts should be real nice. because of all the hype, i am now testing out a set of rcv shafts and, while they are nice, they are really pricey and, i'm not sure if they really are worth the extra money. also, i have found that they do need greasing on a regular basis in order to keep them from being squeaky when turning a low speeds. being that regular chromo shaft use full circle clips, you will not have the kind of u-joint failures that are so common on factory shafts.
Old 04-13-2011 | 11:45 AM
  #23  
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Originally Posted by wayoflife
it all depends on what ratio you are running. the higher the ratio, the smaller the pinion gets and then yeah, it would become the weak link. in a dana 30, a 5.13 is really really small. in a dana 44, a 5.38 is really really small and, it's been a weak link for me.
I know it's off-topic for the thread, but have you had your gears cryo-treated? That could possibly help that "weak link" for you.
Old 04-13-2011 | 11:46 AM
  #24  
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Originally Posted by Merlin4979
I know it's off-topic for the thread, but have you had your gears cryo-treated? That could possibly help that "weak link" for you.
nope. i am running prorock 60's now and haven't had any more problems running my 40's
Old 04-13-2011 | 12:07 PM
  #25  
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Originally Posted by planman
WOL's must be pushing more than 70k by now.
actually, i'm almost at 85,000 on our white JK and 40,000 on our orange JK and, i work from home. these are all miles driving to the trails and wheeling them.

Metal components in the drivetrain fatigue over time. Wheeling hard with a heavy rig eventually will result in failures. It is inevitable.
couldn't agree more.

If you are prepared to spend the money, do the trail repairs, and trailer your rig for far away events, you can run 40s on built 44s.
but what fun is it to trailer your rig

Sent from my DROIDX using Tapatalk
did you really type all that from your droid???
Old 04-13-2011 | 12:28 PM
  #26  
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Originally Posted by TeraFlex
Your wife did that, right?
Joe.... do you really need to ask? She hands me the keys once she's done in the mud and expects me to work miracles on cleaning it.

Best part was driving on the road was throwing giant candy bar looking size chunks of mud at all the other clean Jeeps!
Old 04-13-2011 | 12:28 PM
  #27  
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WOL and Planman, you are nuts! But make us novice wheelers really think before we do MODs and I appreciate that! I was waiting to see when Dynatrac chimed in.

My next purchase is a Prorock for the front. Why is drivetrain always last on the MOD schedule?
Old 04-13-2011 | 12:34 PM
  #28  
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Originally Posted by wayoflife
superior is a sponsor here and so, i might recommend them but, i have also run alloy usa shafts in the past and have found them to work out well too. i understand that ten factory has some nice shafts as well an, when they come out, the foote front shafts should be real nice. because of all the hype, i am now testing out a set of rcv shafts and, while they are nice, they are really pricey and, i'm not sure if they really are worth the extra money. also, i have found that they do need greasing on a regular basis in order to keep them from being squeaky when turning a low speeds. being that regular chromo shaft use full circle clips, you will not have the kind of u-joint failures that are so common on factory shafts.
Thank you very much
Old 04-13-2011 | 03:51 PM
  #29  
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Default Love these threads!

Since I became a member on this forum I have been reading everyone of these "Can I run 40's on a ....." threads and actually tailored all my upgrades from what I gleamed on them. WOL and Planman, you have both been invaluable resources for these upgrades and I thank you. I am replying as a mid level entry in this process. I am still running 35's right now but I am hoping to bump up to a 38" or 39" this summer. After reading all these 40's threads I decided that I wanted to pump all available Jeep funds into preparing my Jeep for bigger tires as well as hard wheeling. Where I live we mainly do rock crawling. My TF short arm kit is going to LA next week with eyes on the 6" springs and shocks (coilovers someday...). As a word of warning to those out there contemplating starting this process 1. You will be tweaking things forever and just when you get it where you like it something else goes out of whack 2. This shit is expensive to do right. If your not committed to spending the money to do it right then you are asking for trouble.
While I won't be joining the true 40's club, here is a cheers to those that have
Old 04-13-2011 | 04:43 PM
  #30  
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granted i don't wheel as much as wol but i have 40,000 mile on my stock shafts with a 145lbs combo, i off road just about every weekend.




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