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Unread 12-20-2007, 12:40 PM   #1
dickensheets
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Lifespan of front driveshaft w/IRO 3" WJ lift

I'm close to ordering the 3" kit.

I don't want to buy a new front driveshaft though.

Will it live thru light to medium wheeling?

Ryan 99WJV8 w/247tc

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Unread 12-20-2007, 12:55 PM   #2
Texas ZJ1
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yes, it will live for a long time.


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Unread 12-20-2007, 02:36 PM   #3
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Quote:
Originally Posted by Texas ZJ1
yes, it will live for a long time.


Hunter
Not my experience.

Ryan: Not sure how many miles you got on your 99/4.7/247TC WJ or if you are still on the original front shaft. If you do have the original CV style shaft, take a look at the CV joint rubber seal of the drive shaft at the TC side of the shaft. That rubber seal does not like the angles caused by lifts. Mine failed shortly after installing an OME lift. Swapped to double cardan after it failed and all is well. I think the CV style shaft is reasonably strong and should support the "light to medium" wheeling you described , but do expect that seal to fail at some point down the road with 3ins of lift.
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Unread 12-20-2007, 02:54 PM   #4
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ok so I guess i'll just have to see for myself.

Tumbleweed, is that boot replaceable, I know it's small/odd shaped. I will worry less if I can throw a $8 boots at it occasionally.

Thanks gents.

Ryan
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Unread 12-20-2007, 04:34 PM   #5
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My stocker lasted almost a year with a 6" lift. Then got a new one made. 390 bucks well spent.




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Unread 12-20-2007, 04:37 PM   #6
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do the ZJs have this same problem? ive been at 4.5" inches and mine is fine
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Unread 12-20-2007, 06:31 PM   #7
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Mine was already going bad from my previous 2"bb/up-country spring set-up. It was toast and making load vibration noises after I installed the 3" springs. The older style D.S. doesn't seem to be able to handle over 2" lift. Got the newer-style u-joint shaft and it works great now. It is even greasable now.
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Unread 12-20-2007, 08:14 PM   #8
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Quote:
Originally Posted by dickensheets
ok so I guess i'll just have to see for myself.

Tumbleweed, is that boot replaceable, I know it's small/odd shaped. I will worry less if I can throw a $8 boots at it occasionally.

Thanks gents.

Ryan
Not replaceable to my knowledge. You can always keep an eye on it and drive it until the seal fails and tosses the grease. Then replace. Double cardan will last longer than the CV.
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Unread 12-21-2007, 02:42 AM   #9
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It's not the boot the fails. It's the joint. This kind of shaft has very little slip along with not handling the angles. Once you disco & start flexing the axle, that's when it fails. Basically it just gets pulled apart.


Mine lasted 3 whole trips wheeling. The last being the hardest trail with the most flexing. When it snapped I wasn't even on anything. It was nice & level.

http://www.imagestation.com/album/pi...?id=4292106177 View it one last time before it's gone.
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Unread 12-21-2007, 08:29 AM   #10
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This thread compliments what we have going on here as well.
http://www.jeepforum.com/forum/showt...82#post4571982

I have a '99 WJ with CV on both ends of the front drive shaft as well. Included in that thread above is the approximate price if you converted to a Tom Woods.

EDIT: It's suggested to grease the u-joints/double cardan as often as oil is changed.

Asked over there, but will include it here - is there an alternative to Tom Wood double cardan shafts or is that pretty much the standard to consider moving to?
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Last edited by EisBlade; 12-22-2007 at 09:56 AM..
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Unread 12-21-2007, 08:50 AM   #11
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You can also go with the MOPAR double cardan replacement (I think it is TSB 030500) which also flashes tranny to make it a 545RFE (if your 4.0L, you'll have different tranny). Can't see the TSB data on WJJeeps lately. MOPAR shaft looks pretty beefy. I have had mine on for 40K (?) now with no problems. Quieter too than the CV joint set up.
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Unread 12-21-2007, 12:57 PM   #12
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He is correct.

However, with only the 3 inch lift and very mild wheeling....his quote, he should be fine.

Now, I've seen Bruce at GSE bust two CV driveshafts in less than 30 minutes. SkyjacktZJ had his CV one replaced with the double carden one made at a local drivetrain shop. They are much better.

It used to be the standard that all ZJs/ WJs with that CV jointed front driveshaft had them replaced with a better / beefier CV jointed one or a double carden.

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