*SOLVED* bent 9" axle housing? - Great Lakes 4x4. The largest offroad forum in the Midwest

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Old March 11th, 2012, 09:11 PM   #1
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Default *SOLVED* bent 9" axle housing?

How would one find if the axle housing is bent? I have a leak at the driver side on the ford 9" in the rear. You can watch the caliper slide back and forth with the tire off indicating something is not lined up true.

I run moser 31 spline shafts and pulled it, rolled it on some steel tubing and could not see any wobble to indicate a bent shaft.

Next would have to be a bent housing. Is there a "TRICK" one can use to find out? Or would i have to pull the axle and take the housing somewhere?

Last edited by Plato2k5; March 12th, 2012 at 08:21 PM.
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Old March 11th, 2012, 10:08 PM   #2
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Quote:
Originally Posted by Plato2k5 View Post
I run moser 31 spline shafts and pulled it, rolled it on some steel tubing and could not see any wobble to indicate a bent shaft.
Any chance you can put an indicator on it and check for runout? Can't help you out with the housing info.
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Old March 11th, 2012, 10:44 PM   #3
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Well i was looking up videos on youtube for bent axle shaft. What I see on the video is what I am seeing on my jeep.


I guess its not so uncommon for the moser shafts to be bent at the flange....... great.

I've noticed the driver side seal leaking a little, but now its bad. I need to address the issue before it causes other problems.

I could try and check for runout but i think its going to rain tomorrow and I can't get the jeep in the garage with the new tires
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Old March 11th, 2012, 11:08 PM   #4
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I'm going to see if my neighbor can take the shaft to work and put it on the lathe. If the flange is indeed bent I'll just have him true it up. I can't afford to drop $250 for a new shaft rite now.
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Old March 11th, 2012, 11:35 PM   #5
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If you pull everything out of the housing and shine a bright lite through it,It will have a perfectly round shadow,if it isn't bent ,iirc.I have never done it,but thats how they do it, I believe,and some times you can straighten them also.
google or maybe you tube.

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Old March 12th, 2012, 10:55 AM   #6
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Quote:
Originally Posted by Plato2k5 View Post
I have a leak at the driver side on the ford 9" in the rear.
This is normal....

As for the caliper moving, did you put some lug nuts back on to hold the rotor? Is the rotor warped? If the flange is bent, it won't necessary cause a leak but will cause a shimmy in the rear. Pulling the axle out and putting it back in without replacing the seal certainly won't help the leak.
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Old March 12th, 2012, 11:00 AM   #7
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x2 9" axles suck for holding fluid
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Old March 12th, 2012, 11:01 AM   #8
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Mine leaks on the passengers side.
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Old March 12th, 2012, 11:01 AM   #9
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A bent housing will not cause a rotational wobble. The housing is fixed. A bend housing can cause wheel bearings or even carrier bearings to go bad. I would replace the seal and not worry about it. I had a 44 that had a wobble for the longest time but on road I couldn't notice it.

I'm almost sure its just the flange that is bent. I think you can also true it up with a press.

Do you notice a soft brake pedal? This was the only thing I did notice, a slight soft first brake due to the caliper being pushed apart.
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Old March 12th, 2012, 01:58 PM   #10
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Yeah I put the lugs back on and put it in drive and let it spin on jackstands.

I only put it back in without changing the seal since the seal has to be pressed off and than on, i cannot do this and i'll live with the leak for now. Figured I'd find out why its like this before I change the seal and have that go bad in a few days.

Like said I do not know how long its been like this. It always has had a slight vibration in the seat so maybe this is why. I'll see if my neighbor can chuck it up on his lathe and see how bent the flange is. Than if its not to much see if he can true it up...or will that mess up the case hardening moser does? Or some say find the high spot and smack it with a BFH......
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Old March 12th, 2012, 02:24 PM   #11
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Does Moser not warranty their shafts? I would be calling them. In the mean time if it is a stock length shaft find a cheap stocker at a local yard until you can get a new good one.
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Old March 12th, 2012, 02:36 PM   #12
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They do if you have original receipt. I have no clue where that is As for getting a stock shaft, I have no idea what this axle came from. Bill aka KillerB went through 3 sets from moser till he sent in my stock 28 spline shafts so they could match them up. And to think I went 31 spline for easy access to spares when I should of just went with 35 spline. Oh well .

When they measure shafts, do they measure from the outer edge of the flange where the rotor backing sits? Or at the back of the flange where the shaft begins?
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Old March 12th, 2012, 04:57 PM   #13
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Take yours with you to the yard and find a match. Normal measurement is outer flange surface to splined end.
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Old March 12th, 2012, 07:31 PM   #14
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To check the housing, the trick with shining a light all the way through is a good trick. You want all of the circles to be concentric.

A simple dial indicator, or even a piece of chalk attacked to a piece of wood or metal will show you if you have runout/bent flange on the shaft itself.
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Old March 12th, 2012, 08:21 PM   #15
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I'm a retard....... so I took the rotor off and there was crap between the two mating surfaces...... cleaned it, bolted rotor back down and it was fine. So thank you all for the help! Now to just find a good seal to use......
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Old March 12th, 2012, 09:04 PM   #16
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My moser shafts had sealed bearings with seals in them. When they leaked I put rtv on them. No more leaks.
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Old March 12th, 2012, 09:15 PM   #17
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so you put the rtv on the bearings??? I put some rtv on the outer most seal where the retainer plate goes....does not leak as bad but still there.
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