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: Can a cracked np231 be welded up and fixed?

Jeepmangled87
06-14-2002, 02:08 PM
there is a small hair line crack in my buddys 231 its got the rubicon slip yoke eliminator in it, can it be welded back up or will that weaken it even more what can he do? Thanks
ol John Henry
06-14-2002, 02:17 PM
Weld it, break it, weld it, and break it

Sure. Weld it, but start looking for a replacement
:D
BRB
06-14-2002, 02:19 PM
theres tons of those in the jyards, just get a replacement case and put his internals in there(if his are good), not worth welding up imho(aluminum)
Insayn
06-14-2002, 03:02 PM
It's gonna crack again...I have 2 laying in the garage. Pieces of Sheeit!
Gozuki
06-14-2002, 06:42 PM
Have fun trying to weld oil impregnated, porous, cast aluminum!
Bert
06-14-2002, 07:13 PM
Get some stuff that comes in a hard puddy. I got mine from the local auto parts store for 3 bucks.

you mold it and it gets hot. It becomes steel. Mine has been holding for over 2 years now. Without a leak.

Dont waste the time and effort welding it. Just get this puddy stuff and carry a tube of it as spare. Its about 4 inches long and you bust off a piece then 'work' it in your fingers then stick it on. presto.

I never thought it was going to work, but was convinced into trying it. And I am real happy I did.

What part of the 231 cracked? Was it due to improper driveshaft lenght? Something to think about. That is what caused mine to crack.
badassjeepguy
06-14-2002, 08:13 PM
that putty shiat does work good....... i have a 231 sitting around..... has 60,000 miles on it, never used in any kind of offroad rig...... let me know if interested...
Josh 89XJ
06-15-2002, 01:30 AM
If the crack is just leaking fluid, clean it up really well and do your best patch with JB Weld like Bert said. It'll work.

Welding on that case is going to be fawkin' impossible. I was TIG welding an aluminum box the other day and I was putting a handle on it. Well, the handle was made of cast aluminum so it just kept trying to melt like crazy. What ended up working was to heat it just to about the melting point and then keep pushing some filler into it. So, the filler replaced the pores from the casting (sort of) and then it was actually filler on the outside and I was able to at least get a decent weld onto the aluminum box. It held damned good, but probably not what you are wanting to be doing here if you can avoid it.