Driving without outter stub shaft installed - JKowners.com : Jeep Wrangler JK Forum
 
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post #1 of 11 Old 01-24-2014, 10:05 AM Thread Starter
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Driving without outter stub shaft installed

Will the unit bearing come apart? Is it safe? I've heard both, you can on a JK and you can not. What's the real deal?

2010 JKUR, 4" Pro C., 3/4" f Daystar spacer, 5.38's, EVO sleeve/gusset/custom trussed, Rear Ten Factory axle shafts, 1.5" wheel spacers, Pro C. 17 x 9 wheels, 38 x 14.50 x 17 MTR's, SuperChip FP, no fenders, B&M Tranny cooler, Magnaflow, Fr./ Rr. frame hacked off, HD Balls

29,000 miles as of 12/13/14
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post #2 of 11 Old 01-24-2014, 10:20 AM
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You can run w/o the shafts up front no problem.

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post #3 of 11 Old 01-24-2014, 10:23 AM
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No it will not come apart. Just stuff a rag in the axle tube.

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post #4 of 11 Old 01-24-2014, 10:28 AM Thread Starter
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Thanks guys because that ugly rumor is raising it's head again. Maybe it was true on an earlier Jeep or something.

Just to let you guys know. This is my first experience on a Jeep. I was a early 80's Toyota (2 of them) and 80's K-5 blazer (3 of them) before. Thanks again.

2010 JKUR, 4" Pro C., 3/4" f Daystar spacer, 5.38's, EVO sleeve/gusset/custom trussed, Rear Ten Factory axle shafts, 1.5" wheel spacers, Pro C. 17 x 9 wheels, 38 x 14.50 x 17 MTR's, SuperChip FP, no fenders, B&M Tranny cooler, Magnaflow, Fr./ Rr. frame hacked off, HD Balls

29,000 miles as of 12/13/14
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post #5 of 11 Old 01-24-2014, 10:50 AM
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You can run without the stub shaft on a JK, but you CANNOT run without the stub shaft on a TJ.

2013 JKUR
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post #6 of 11 Old 01-24-2014, 11:08 AM Thread Starter
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Quote:
Originally Posted by steve578 View Post
You can run without the stub shaft on a JK, but you CANNOT run without the stub shaft on a TJ.
That is where people are getting all jacked up about it. Applying TJ stuff to JK applications.

2010 JKUR, 4" Pro C., 3/4" f Daystar spacer, 5.38's, EVO sleeve/gusset/custom trussed, Rear Ten Factory axle shafts, 1.5" wheel spacers, Pro C. 17 x 9 wheels, 38 x 14.50 x 17 MTR's, SuperChip FP, no fenders, B&M Tranny cooler, Magnaflow, Fr./ Rr. frame hacked off, HD Balls

29,000 miles as of 12/13/14
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post #7 of 11 Old 01-24-2014, 11:23 AM
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Quote:
Originally Posted by 10jk View Post
That is where people are getting all jacked up about it. Applying TJ stuff to JK applications.
To my understanding, it's because the older unit bearings were tapered roller bearings; they would need the preload of the hub nut to stay together and work properly.

JK unit bearings are either standard roller or ball (ball I think, but I'm not 100%), which do not need an axial preload.


....I suspect this is also a big reason the JK unit bearings aren't as "long lasting" as well.... roller and ball bearings don't handle axial loads well.

-Mike
2007 2dr X, 6sp, 35's on D44's, 2" lift, cage, hydro, etc.
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post #8 of 11 Old 01-24-2014, 12:27 PM
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Don't know if they are using tapered or angular ball bearings in the JK unit bearings but the difference is that they are strongly fixed together with a fixed pre-load within the unit thus will not fall apart without a stub shaft.
Regarding "not long-lasting", well they are engineered for OEM tire weights and sizes


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post #9 of 11 Old 01-26-2014, 05:59 PM
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Quote:
Originally Posted by Panamon Creel View Post
Don't know if they are using tapered or angular ball bearings in the JK unit bearings but the difference is that they are strongly fixed together with a fixed pre-load within the unit thus will not fall apart without a stub shaft.
Regarding "not long-lasting", well they are engineered for OEM tire weights and sizes
Spyntec has broken down pictures on their website. They're angular ball bearings, but ball bearings none the less.

And you are correct, they are preloaded during manufacturing.


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-Mike
2007 2dr X, 6sp, 35's on D44's, 2" lift, cage, hydro, etc.
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post #10 of 11 Old 01-26-2014, 07:10 PM
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Here is a thread that shows what's inside the JK unit bearings:

https://www.jkowners.com/forum/showthread.php?t=35276

2008 Unlimited Rubicon Automatic
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post #11 of 11 Old 01-26-2014, 10:04 PM
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Shattered my ring and pinion today I disconnected my u joint from the inter axle shaft and I'm just running the nub shaft with a rag in the axle tube.

2011 Wrangler Sport,RK 2.5 X Factor with RRD 2.0 shocks, Synergy steering, Poison Spyder bumpers narrow alum fenders diff covers, LOD sliders, Rockridge 4wd tail lights, trucklites, TF higned tire carrier, Cooper discover STT 37x13.50, 4.56 gears

Ordered a 2015 2 door Rubicon 3-23-15
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