Think about it this way,front axle shaft sits inside the tubing, the part that comes out of the housing is a yoke which is attached to the stub shaft(Outer axle) by way of a u-joint. Get in front of your jk and look inboard of your wheel and you should see it. Where the two are joined by a u-joint.

 

So it isn't that one shaft is inside the other but that one is outboard on the jeep and one is inboard. I assume the outer shaft is more or less connected to the wheel and moves it's axis with the axis of the wheel. Then moving inboard you hit the u-joint than the inner shaft which is connected to the differential. Correct?

 

Yes...........

 

So witch u-joint likes to break the one connecting the inner and outer axle or the one at the yoke?

 

Probably easier to just look at pics.

JK D30 front drivers side: Outer - ujoint - Inner going to diff



Rubi d44 rear - both sides:

 

The inner and outer shafts are connected by a u-joint by way of the yoke ears. I'm not sure what other yoke your talking about.

edit: pic above should help explain. Thanks nthinuf

 

I wheel the hell out of my JK. I've been running an Aussie in the front D30 for 2 years. I've spun u-joints out of the front axles a lot, but I was doing it before the Aussie was in. The Aussie is the best money I have spent on my JK.....hands down. I'm running 36x12.50x15 Super Swamper TSL Radials. They are heavy as hell. Just be smart with it. If you wheel your Jeep a lot, you'll get a feel for it. You'll know when you're pushing it too hard.

 

I like this post. Are u running stock axle shafts, u-joints? If u spin a u-joint out is it broke or do u just pull the axle and put it back in?

 

I'm running stock shafts. A few weeks ago I drove my JK off in a hole that looked like a big empty swimming pool. The exit end was about 5' straight up. I got the front end up and over, but when the front wheels starting spinning and caught, it snapped the ears on the driver side axle. The u-joint flew into lots of tiny peices. I was lucky enough to have a buddy who recently upgraded shafts, so I didn't have to spend a bunch of money for a new shaft. But, let me tell you, I was hammered down when it broke. There were about 25 people egging me on, so I thought what the hell. I knew better. It would have been suicide even if I was running a D60. My passenger side u-joint is still factory. Don't know why it's held up so well, but I've put a half dozen or so in the driver side. I'm still running stock axle shafts. The u-joints only fail when the caps come off.....unless you are doing what I described above! I tack welded my caps in place. That has saved me from losing them a lot since I found that little trick. It's a good idea to get familiar with how to change them and carry a spare just in case. They are not difficult to change on the trail if you need to.

 

I have an ARB on my front D30 and no issues so far. All stock including tyres but going to 33s tomorrow. I wheel fairly gently but will look to upgrade parts as they fail.