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Old 07-04-2011, 05:16 PM   #1
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4" lift to my 2010 Rubicon unlimited 4 door

I have installed a 4" Sky Jack pallet lift kit. I have been reading that there will be a boot problem with the drive shafts. Is this problem always there and is it with the front and the back drives shafts? Can the shafts be modified to fix without purchasing new parts?

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Old 07-04-2011, 05:40 PM   #2
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Quote:
Originally Posted by MrT Rubicon
Is this problem always there and is it with the front and the back drives shafts?
With 4", almost certainly. Especially if you have an auto transmission. Both front and rear.

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Originally Posted by "MrT Rubicon
Can the shafts be modified to fix without purchasing new parts?
Not that I'm aware of.

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Old 07-04-2011, 05:44 PM   #3
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I got a 4" lift and so far my DS boot is still intact.I replace the factory skid with Skidrow so that the shaft wont rub on the skid when fully flexed.If you dont wheel your rig then dont worry about it.

There alot of stuff written about this and that pertaining to anything over 4" and so far i have not encountered them.I even got a Tom Woods DS as a replacement when the time comes and im still waiting to this day...and I wheel my rig hard.
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Old 07-04-2011, 05:50 PM   #4
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^^That's great to hear. I always here bad news coming from 4 doors with over 3.5" of lift.
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Old 07-04-2011, 05:59 PM   #5
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^^That's great to hear. I always here bad news coming from 4 doors with over 3.5" of lift.
I know what you mean.But before i did the 4" lift i too read alot about it being bad for your DS and all.For the most part yes IF you use your factory skid specially if discoed.

And most people that talk bad about it dont even have that size of lift...its either i read it somewhere or my friend Jeep had it same story with gears.
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Old 07-05-2011, 08:52 AM   #6
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Thanks I will keep an eye on it. Will look into the skid plate.
Thanks again
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Old 07-06-2011, 12:37 AM   #7
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Quote:
Originally Posted by Rogerg View Post
I got a 4" lift and so far my DS boot is still intact.I replace the factory skid with Skidrow so that the shaft wont rub on the skid when fully flexed.If you dont wheel your rig then dont worry about it.

There alot of stuff written about this and that pertaining to anything over 4" and so far i have not encountered them.I even got a Tom Woods DS as a replacement when the time comes and im still waiting to this day...and I wheel my rig hard.
This the skid you used? Skid Row Offroad JP-5001 - Skid Row Offroad Engine & Transmission Skid Plate for 07-11 Jeep® Wrangler & Wrangler Unlimited JK with 3.8L - Quadratec
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Old 07-06-2011, 05:41 AM   #8
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Yes thats the one.Just to warn you the top part mounts to the engine mount and can be a PITA to install.
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Old 07-06-2011, 06:20 AM   #9
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How are liking the lift? I purchased it but haven't installed it yet.
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Old 07-06-2011, 07:07 AM   #10
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Quote:
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...its either i read it somewhere or my friend Jeep had it same story with gears.
Here's where most have read it.


Fatal Angle Tom Woods JK Wrangler Driveshafts - Jp Magazine
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Old 07-06-2011, 10:44 AM   #11
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Well 4" on a unlimited is in that grey area, the same with 3" on two door. I guess it depends on lift because some people have the problems in this area and some don't. Most here will recommend the 2.5 for 2dr and 3.5 for the unlimited not to say you can't do a 3" or 4" but rather if you do and it ends up you are one of the few that ends up in failure then the board doesn't want you to think we were irresponsible in the recommendations. I mean you come here for sound advice I think, and the sound advice is giving what could happen if you do a 4" lift. Not just cheering someone that has never heard of the problem on in hopes they won't have a problem.

Fatal angle is not a absolute failure at 3" on 2 dr and 4" on 4 dr but rather it is a possible one when you hit a certain lift size and usually takes time before the problem occurs. And some are willing to take on the possibility and some would rather go safe and know for sure there will be no issues. Just know if you do it and don't change out the driveshaft with upgraded joints that you could break down some wheres you don't want to. Will it happen, no one can answer that for sure. But the great people on the board just offer advice to it's members so they know the possibilities.

I seen someone post the other day on this that they did a lift over the recommendations and seem offended because people gave the possibilities as if we are jealous or something. I think board members really just want to help give good advice, nothing more.
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Old 07-07-2011, 07:31 AM   #12
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Rick thanks for the response I understand your advice. Common sense on the failure possibly anytime anywhere. You did give me some in site on this is not a necessary drive shaft change during the lift installation but some thing to think about in the near future.
This came from 4 wheel drive Hardware sales.
I assume you are running a 35 inch tire. You don’t “need” to replace the shafts for a 35. It is recommended to do so if you are taking the vehicle off-road. We carry JE Reel Driveshafts and they are an excellent choice for JK owners. Give me a call to order or get a quote.
Clint
I'm just getting started the lift is installed with the factory Rubicon tires. Looks great and the ride didn't change all good. There will be 35" in the future.
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Old 07-07-2011, 10:14 AM   #13
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The problem with lifting the 4door and wheeling somewhat hard and disconnected is that the boot will make ever so slightly contact with the tranny pan and rip the boot and or destroy the steel band holding it in place. Also eventually with that high of a lift the Rzeppa joint (front shaft) will eventually start to throw out its grease.

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