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willysmjeeps.com :: View topic - Rear differential holes
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Rear differential holes
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aforests
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PostPosted: Fri Jan 23, 2015 8:55 pm    Post subject: Rear differential holes Reply with quote

Tonight was cleaning the rear differential and noticed several indentations where holes are developing. Opinions?




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Aaron
1950 M38 - #MC11328, 24volt, 1948 CJ2A (Lefty)

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4x4M38
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PostPosted: Fri Jan 23, 2015 9:04 pm    Post subject: Reply with quote

Hi Aaron,
I asked about the same thing a few days ago.

I was told they are welds where they attached the axle tubes.

Brian
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Brian
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Bobber
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PostPosted: Fri Jan 23, 2015 9:14 pm    Post subject: Reply with quote

I think they're like a rosette type of weld. They drill a hole put the material they want to attach then fill the hole with a welder. makes for a clean job. Other wise you would have a weld bead around the contact point where the shaft and diff meet. just my opinion.
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aforests
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PostPosted: Fri Jan 23, 2015 9:37 pm    Post subject: Reply with quote

4x4M38 wrote:

I asked about the same thing a few days ago.

I was told they are welds where they attached the axle tubes.


I somehow missed your post on this. So do I need to weld these shut again or plug them somehow?
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Aaron
1950 M38 - #MC11328, 24volt, 1948 CJ2A (Lefty)

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Bretto
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PostPosted: Fri Jan 23, 2015 11:58 pm    Post subject: Reply with quote

Yep, plug weld or rosettes.
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Bobber
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PostPosted: Sat Jan 24, 2015 3:52 am    Post subject: Reply with quote

No, I think they look normal. They look like mine do.
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DanS
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PostPosted: Sat Jan 24, 2015 7:26 am    Post subject: Reply with quote

Every jeep diff I have worked on looks like that. The weld inside will be very clean once you clean the slag and rust out. Clean very well before you prime and paint, it will be fine.
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TomM
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PostPosted: Sat Jan 24, 2015 7:34 am    Post subject: Welds Reply with quote

The location of the weld is normal from production. The weld quality varied back then and that particular weld on your jeep is porous. My M38 also has a less than perfect weld. You won't have a problem with that axle housing. After many years my weld shows signs of weeping a little rust out of the porous weld. If you want to be meticulous spend time brush priming.

Many chassis welds were similar in quality.
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aforests
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PostPosted: Tue Jan 27, 2015 8:35 am    Post subject: Reply with quote

Another question on the rear differential back plate. The bottom hole has damaged threads and I can't get the bolt to tighten. I have never tried to Heli-Coil anything, but am pretty handy... so am I better off learning on this or just taking the rear axle into the local machine shop and have them do it?


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Aaron
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DanS
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PostPosted: Tue Jan 27, 2015 1:00 pm    Post subject: Reply with quote

I think it is something you could do. Problem is the cost. When you buy a a Heli Coil kit, you get just one size and pretty pricey, $40-50 in my area. It probably wouldn't cost that much more to have a shop do it, then you would also know it's right.

Dan
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Dan Schultz
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aforests
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PostPosted: Tue Jan 27, 2015 1:17 pm    Post subject: Reply with quote

Those were my thoughts as well!
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Aaron
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TomM
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PostPosted: Mon Feb 02, 2015 4:58 am    Post subject: Cover Reply with quote

Be sure to turn the cover vent so that it is vertical. Yours is horizontal now. Agreed - you can do the helicoil yourself.
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wesk
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PostPosted: Mon Feb 02, 2015 10:01 am    Post subject: Reply with quote

You may also want to insure this MWO is complied with on your axle:






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Wes K
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aforests
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PostPosted: Mon Feb 02, 2015 10:09 am    Post subject: Reply with quote

Already checked and mine has the baffle installed.
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Aaron
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4x4M38
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PostPosted: Mon Feb 02, 2015 10:57 am    Post subject: Reply with quote

I'm going to live large and see how long I can get away with it!
Laughing
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Brian
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