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By Philippe BROST, France on Monday, September 21, 2015 - 04:18 pm:Is it possible to put a drain plug in my 1914 rear axle without weakening the case ?
What maximum size ? I would like a plug with a magnet.
Is there enough thickness for thread or should a nut be welded Inside ?
By Gene Carrothers Huntington Beach on Monday, September 21, 2015 - 04:43 pm:Smaller size the better. I have heard from others it is a great idea to install one when rebuilding the RE. I'm sorry I didn't think of it when I did mine.
By Jerry VanOoteghem - SE Michigan on Monday, September 21, 2015 - 04:58 pm:Yes, you could do it. A 1/8" pipe plug would work. Locate it something like 3/4" from the parting line, in the right axle housing.
By Mark Gregush Portland Oregon on Monday, September 21, 2015 - 07:12 pm:1/8 plug sounds right. I have done them in car with the oil/grease/lube left in. Any metal shavings should get trapped in the oil/grease/lube and come out when the hole is drilled and tapped. It flows slow enough you should be able to drill and tap before all the oil/grease/lube has come out. 
By Wayne Sheldon, Grass Valley, CA on Monday, September 21, 2015 - 07:32 pm:1/8 pipe plug is what my old race car I used to have had in it. I never needed to drain it, but I would imagine it would take all afternoon.
I really don't know that I would bother? With modern gear oils, you should never need to change it once it is reasonably rebuilt. If something breaks, and you have to tear it apart? You split the pumpkin and make a mess. Just me.
Drive carefully, and enjoy, W2
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