Screenshot
Looks like it binded?
Looks like it binded?
CK5
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How much front driveshaft slip?
- Thread starter Mastiff
- Start date
wetoolowdingbangow
1/2 ton status
That's a binding tear if you ask me. You can see it in the shape of the crack. If the shaft prezteled I'd say power with the combination of a hit. The front end does interesting things in the position you were in. Once it unloads from the top of that hill the strain is eased up on it and she'll want to rotate in place. It's one of the few things that just can't be replicated by a flex ramp. I know my drive shaft is pretty pissed when my front end unloads like that.
Oh and I liked that because I couldn't find the image lol...not that I like carnage.
wetoolowdingbangow
1/2 ton status
This entire time I thought it was poop poop pufffff?
No no no, it's poop puff poop
You guys are wrong. It is SNAP
pretty crappy screen grab but the front tires got quite a bit higher than I thought.
pretty crappy screen grab but the front tires got quite a bit higher than I thought.
wetoolowdingbangow
1/2 ton status
Didnt realize you got air. I got air once lol. Key is to let up...I didnt but nothing happened.
I did that once many years ago in my previous truck. My buddy's eyes got real big and my wife in the passenger seat needed a change of shorts.... lol
That's the issue with that hill. You have to bump this 16-18 inch rise. There is one midway up and one at the top. Pretty sure the trailer was on one while I was on the other up front. Only a little air. When I broke the axle years ago front was about 3 feet up and waaaay tippy. I gotta find that vid
Since it broke so close to the end of the female yoke would that indicate the male portion was also extended too far? (meaning the length of the spline or complete assembly wasn't right for the amount of travel the suspension was capable of)
Uh . . . yes! The slip yoke clearly broke just past where the spline engagement was at time of breakage. If the spline was more engaged at the time of breakage this wouldn't have happened. From the looks of it, there was probably a little over 1" of engaged spline at time of breakage and all that rotational force was on the empty slip yoke tube with no spline in it. The spline was only engaged in the heavier wall collar.
There is a lesson to be learned here.
Interested to see what the driveshaft guy says. Even if he warranties it, it is just going to happen again in a similar situation.
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I hate to definitively call the cause of the break.
Can you pull the broken part off ( female with the dust cover). Getting a look at the end of the splines will give more indication of the problem
Can you pull the broken part off ( female with the dust cover). Getting a look at the end of the splines will give more indication of the problem
Dropped it off today. Showed the guy the video and he was surprised I didn't break the transfer case. He still isn't concerned about spline engagement. His assessment is that the shaft would have pulled and separated when it broke. That is why it is where it is on the splines. If it had been all the way extended it would have completely pulled the yoke off.
That makes more sense to me.
He measured it, builds hundreds of them and is confident in his shaft. I trust him.
That makes more sense to me.
He measured it, builds hundreds of them and is confident in his shaft. I trust him.
Answer this for me @4wheelinfury
Here is a shot of your shaft at ride height, note how far it's stuffed already. How much spline is engaged right here? again this is at RIDE HEIGHT.
and here I would like to note the black marks I've circled, presumably from the end of the female (dust cap) when your stuffed. How much spine is engaged if it's stuffed that far?
I'm with @truck-oholic this is bound to happen again with these parts.
Here is a shot of your shaft at ride height, note how far it's stuffed already. How much spline is engaged right here? again this is at RIDE HEIGHT.
and here I would like to note the black marks I've circled, presumably from the end of the female (dust cap) when your stuffed. How much spine is engaged if it's stuffed that far?
I'm with @truck-oholic this is bound to happen again with these parts.
Are you guys assuming it broke with the amount of engagement shown in the pic? It's possible it slid down or something after it broke, right? Unless the yoke piece was tight on the splines, which would be a big clue.
wetoolowdingbangow
1/2 ton status
Its definitely possible that part slid down after it happened. I think what everyone is illustrating is that its not a normal place to break a shaft. To me the shaft should have broke at the fuse (u joint or yoke/pull the yoke straps out etc.) which leads me to believe something else is going on.
Yes, that is my take on it. How else do you explain that failure looking at those pics where the slip yoke is clearly bound up (cocked at an angle) on the tip of the spline? Also, if the spline was indeed properly engaged at the time of failure why would that slip yoke break around the theoretically engaged spline rather than just break the u joint?
@wetoolowdingbangow hey look at that we actually agree on something for once 
If it slid down easily it would sloppy/worn out and not balance well.
wetoolowdingbangow
1/2 ton status
@wetoolowdingbangow hey look at that we actually agree on something for once
Its probably due to the fact that weve both seen stuff break and every break tells a undeniable story.
Plus we smart.
