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> Liquid welds on the tranny case, JB Weld, Permatex Gear Oil RTV Gasket Maker, ??
Hank914
post Jan 11 2015, 11:46 AM
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I have a tranny case leak that needs a repair. Here is a pic of the leak, which when warmed up is about one large drop a second.


Attached Image

I figure that I should do a real weld for the permanent fix, but would like to do a temp fix so I can drive over to my welder brother-in law about a 100 miles away.

So, what is the best liquid weld goop for this type of a hole (about 1-2 mm in diameter)?
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a few loose screws
post Jan 12 2015, 12:17 PM
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You can patch a leaking case without getting it perfectly clean, but its a huge pain in the dink. Multiple steps and products required. Definitely not worth the headache for such a small hole. The plug is where its at.
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CatDaddy60
post Jan 13 2015, 06:27 PM
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I have a Case that ran afoul of a wayward axle shaft and was subsequently welded at the bell housing. While it can be done, special attention is needed not only for the cleaning prior to the weld, but also the rod material for filler. Mine was welded by a VERY experienced welder that is a welding troubleshooter of a major aircraft manufacture in the Northwest. Long story short it can be welded but you have to be careful.
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Dr Evil
post Jan 13 2015, 07:49 PM
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For a small spot like Hank's, no prob to just plug weld. For more extravagant work, you have to consider warpage and plan accordingly. It is a learned skill. I understand the basics, but that is it.
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relentless
post Jan 14 2015, 04:24 PM
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One more tip if you do drill and tap it. Coat the drill bit and tap with grease and go slowly. Take them out after a few turns and clean the metal shavings off, put on fresh grease. Be extra careful when you reach the insides.

This is a tip from having to tap motorcycle heads (aluminum) for helicoils while still on the bike, and keeps the shavings from entering the main cavity.
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Hank914
post Jan 18 2015, 08:18 PM
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Thanks everybody for the comments and advice.

I went with the "drill out the hole, thread the hole, and then put in a metal screw to fill up the hole" route. See up thread for the pictures of the leak and the hole after it drained. See below for the pics of my patch job.
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Dr Evil
post Jan 18 2015, 08:21 PM
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Looks great (IMG:style_emoticons/default/wink.gif)
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Hank914
post Jan 18 2015, 08:22 PM
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Pic after my repair job. I screwed in a metal screw, and coated it with Permatex Gear Oil RTV Gasket Maker.Attached Image

I used a hex head metal screw with a flathead top that allowed room to goop it.
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Dr Evil
post Jan 18 2015, 08:28 PM
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Did it work? If it gives you issues, change to NPT as it will be self sealing.
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Hank914
post Jan 18 2015, 08:29 PM
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And then I had to go have a few (IMG:style_emoticons/default/beer3.gif) while it cured for 24 hours.

Then I had to (IMG:style_emoticons/default/driving.gif) it for about 10 miles in the garage on jack stands (with a book on the gas pedal and it in 5th gear) since I did not want to coat the neighborhood streets with oil if my fix did not work. Since that seemed to work well, I it took for a test drive. After about 75-100 miles and 3 plus hours, this is what the fix looks like now.


Attached Image
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Hank914
post Jan 18 2015, 08:30 PM
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So yes, there is some yellow, which is oil. But minimal, if any drippage.
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Dr Evil
post Jan 18 2015, 09:53 PM
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Ya, that is why they use pipe tread on the plugs, like Mike B said in post 6. With that head on the screw, I dont think you can get a washer under there to seal it.
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Tbrown4x4
post Jan 19 2015, 04:53 AM
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Mike, I was just about to PM you about Hank914's old transmission. Did the autopsy help determine cause of death? lots of speculation, but no answers
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Hank914
post Jan 20 2015, 01:37 AM
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QUOTE(Dr Evil @ Jan 12 2015, 09:41 AM) *

A little back story...

This is the replacement tranz for the one he had explode on him. He has, in fact, had two issues that I have never seen, and that suck, happen to him. Do not get on a plane with Hank914....just sayin (IMG:style_emoticons/default/wink.gif)

Seriously, that hole was missed by me. When I had that core, it never leaked a drop and I thought nothing of it. I dont usually have to inspect cases as they have always been obvious. There was no trauma to this case based on the condition of the rest of the case and area around the hole.

I think the tap and plug method is brilliant. I was only thinking quicksteel or JB.

Hank, let me know the total of whatever you need to buy/do to have it fixed and I will get a check off to you.


So, the fix was pretty cheap:
Advice was free (thanks, Mike B)
Metal screw was 50 cents
Permatex was about $5.99
3quarts of 80-90 tranny oil was about $8/each, or $24

Total about $30
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sixnotfour
post Jan 20 2015, 02:06 AM
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QUOTE
Seriously, that hole was missed by me. When I had that core, it never leaked a drop and I thought nothing of it. I dont usually have to inspect cases as they have always been obvious. There was no trauma to this case based on the condition of the rest of the case and area around the hole.



Send him a new one one
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