Can You Replace a Front Diff Axle Tube? - Hemi Truck Club
 
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Old 11-03-2017, 06:31 PM   #1
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Can You Replace a Front Diff Axle Tube?

somehow I ended up with a cracked mount on the axle tube on my front diff. It's the mount on the passenger side (obviously). I have a spare housing with a good axle tube on it, so does anyone know if the tube can be removed and replaced? I already have 4.56 gears in the diff and would like to avoid buying a new bearing kit and paying to have the gears set up in the other housing. I toyed with the idea of having it welded but then i ran across that spare housing.

Does anyone know if a shop can pull and press the tube from one diff to the other? it's not welded, and it got pressed in there in the first place, but I realize they were meant to be installed, not removed.

Thoughts?

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Old 11-03-2017, 06:48 PM   #2
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Yes it can be done by a machine shop but they will have to remove your setup to do it anyway or correctly. It also has a plug weld on it to keep the tune from moving somewhere. If it were mine I would just drill a small hole at the end of the crack both sides and weld it up and be done with it.
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Old 11-03-2017, 07:12 PM   #3
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Agreed, weld it...
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Old 11-04-2017, 01:55 AM   #4
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That's kind of what I was thinking, as it isn't exactly a highly stressed area as the five bolts on the pumpkin would be the ones handling most of the stress. My concern is how deep the crack may go, I don't want to just weld over top of it so that is why i was looking at just replacing the entire tube or swapping the gears to another housing. If the crack is half or 3/4 of the way through, that is when I really start to wonder. I realize that a proper weld will add, not sacrifice, strength, but I guess I will see.
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Old 11-04-2017, 05:52 AM   #5
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Can you post a picture of the crack? Any idea how the crack came about?
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Old 11-04-2017, 09:42 AM   #6
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I will take a picture when I head out to the shop. And the crack is a complete mystery to me, there was no accident or anything that could have caused it when it came up. I have been scratching my head over it that's for sure.
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Old 11-04-2017, 10:56 PM   #7
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Cracked deeper than I thought. One whack with a dead blow hammer popped it right off.




Weld?
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Old 11-05-2017, 04:36 AM   #8
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WTH how did that even crack. I have never seen that before even in wrecked trucks. I'm not sure that can be welded back on there its cast that's doesn't weld to great.
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Old 11-05-2017, 05:05 AM   #9
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I believe thats replacement time. There is no good procedure to weld it. Too thick, too small... cast..
I would try to figure out how it got broken...
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Old 11-06-2017, 01:10 AM   #10
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welding cast aluminum isn't an issue. people weld heads all the time. it's not a highly stressed area, so I am not too worried about having it tig'd so long as they prep it well enough to get adequate penetration, but as far as how that came about, it's one hell of a question thats for sure. as of tomorrow i will have a third complete diff here, so any thoughts on just swapping that tube over? i'm not too wild about buying a new bearing kit and paying to have the gears swapped again if i can avoid it.
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