Can a transmission be welded? - JeepForum.com
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post #1 of 20 Old 12-04-2013, 10:33 PM Thread Starter
91YJ-98TJ
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Can a transmission be welded?

I went to check my transmission fluid, and the fill plug was pretty tuff to get off, so topped it off and went to put the plug back in, and being a dumb *** figured it should go on just as tight as it was getting it off and I broke of the top part of the threaded hole where the plug goes in. I keep trying to post pics but there too large. So can this be welded or what do I do from here?

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post #2 of 20 Old 12-04-2013, 11:10 PM
SeanB95YJ
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the material is (or SHOULD be) cast aluminum... it CAN be welded, but from my experience, would need to be TIG welded by a pro.

Whether or not YOUR particular break can be repaired I guess would depend on the extent of damage and the location. Only thing I can suggest would be to drain it, remove it and bring it to a good welding shop and ask them.

Good luck

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post #3 of 20 Old 12-04-2013, 11:29 PM
baktie_91YJ
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Its either cast aluminum or cast magnesium, dont remember which, both of which can be TIG welded. Unless you have a nice TIG setup and are extremely comfortable doing it then I would bring it to a shop
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post #4 of 20 Old 12-05-2013, 07:34 AM
tom_sprecher
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Even when you try to TIG cast aluminum it is almost impossible to clean it enough to keep worn holes from forming while welding it. Ask me how I know.

Tom
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post #5 of 20 Old 12-05-2013, 10:22 AM
superj
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liquid metal it, ha ha ha. sometimes that works for stuff, and sometimes not. just depends on the stresses that area of the transmission deals with

I don't feel like working on anything, at this time.
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post #6 of 20 Old 12-05-2013, 01:22 PM Thread Starter
91YJ-98TJ
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Thanks everyone. I've asked around town and a few people recommended the same guy, but when I went by he hasn't been there. I figure if he doesn't feel confident doing it just trying jb weld and hoping for the best because either way I'm looking at a new transmission. Right?

Think I probably ended up cracking it when taking the plug out since I did have to use a breaker bar and then just realized what happened when I tried to tighten it.
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post #7 of 20 Old 12-05-2013, 03:00 PM
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If its aluminum you'll need a high frequency machine to weld it.
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post #8 of 20 Old 12-05-2013, 09:40 PM
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Quote:
Originally Posted by Steve707 View Post
If its aluminum you'll need a high frequency machine to weld it.
What is a high frequency machine?

To me, RC is kind of the Harbor Freight of springs. Sometimes you get a good deal and sometimes you don't.
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post #9 of 20 Old 12-06-2013, 07:01 AM
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Quote:
Originally Posted by nzpete View Post
What is a high frequency machine?
It'll weld AC and not just DC.
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post #10 of 20 Old 12-06-2013, 07:19 AM
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Of your tranny was in nice shape, can I suggest getting a used one from a JY, having it gutted and put your parts inside. Or get a used one and when the gears give er, swap yours in. Just an idea,
Should be cheaper than a reman or a new one.

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post #11 of 20 Old 12-06-2013, 07:46 AM
nzpete
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Quote:
Originally Posted by Steve707 View Post
It'll weld AC and not just DC.
Most stick welders are AC.

To me, RC is kind of the Harbor Freight of springs. Sometimes you get a good deal and sometimes you don't.
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post #12 of 20 Old 12-06-2013, 08:02 AM
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Quote:
Originally Posted by nzpete View Post
Most stick welders are AC.
You plug them in to AC outlets, but you don't weld steel with AC. Stick welding is DC+.
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post #13 of 20 Old 12-06-2013, 08:26 AM
willawolfe
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Why not get a new trans on cl or junk yard. Aside from your labor it may cost same as paying someone who might be able to fix it
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post #14 of 20 Old 12-06-2013, 10:31 AM
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A photo of the break would be handy. Welding will work but you won't do that with a stick welder... Go to a pro welding shop as suggested.

However, what *I* would do is find a "core" or otherwise blown up/free/cheap tranny and just swap the cases.

How many old threads actually convince *you* to read all 36 pages? http://www.jeepforum.com/forum/f12/length-envy-build-thread-629700/
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post #15 of 20 Old 12-06-2013, 02:25 PM
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Quote:
Originally Posted by Steve707 View Post
You plug them in to AC outlets, but you don't weld steel with AC. Stick welding is DC+.
Um what?

A standard transformer-based arc welder nearly always produces AC output. DC is the perferred method for welding , but tons of people weld steel with AC output buzz boxes



I welded up my transfer case that was halfway cracked and the ears broken off with a Mig Spool gun setup for AL. Worked awesome.

Ruined a perfectly good jeep.


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