Fumoto Drain for Transfer Case?

[roaniecowpony]

I briefly looked at my transfer case, the other day while under my rig, to do a fluid change in the future. I have Artec skids and it would be a pretty difficult thing to drain the fluid without dropping that section of the skids. So, I thought it might be worthwhile to install a Fumoto drain while I have have the skid panel off.

I see that the plugs are a type of tapered pipe thread. I'm wondering if anyone has done this and figured out the thread type (NPT or Metric) and size. I know the 3.6 plugs in the side of the block for coolant drains are metric tapered pipe. But, I think the transfer case is a long time U.S. maker and may well be NPT. Anyone know the thread size of the transfer case?

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[driventoadventure]

I second this question... Anyone know the thread/size?

I realize that inspecting the magnet is an important part of the drains, but the valves at least make it easier from a dealing-with-the-skid-plates perspective.

 

[Terrymo]

I saw an older post where @CarbonSteel and @Rhinebeck01 were discussing this. I wonder if @CarbonSteel figured it out.

 

[Eyeball]

Given the relatively low frequency of fluid changes in a transfer case, I don't think I would bother with a drain valve for a transfer case.

 

[roaniecowpony]

Given the relatively low frequency of fluid changes in a transfer case, I don't think I would bother with a drain valve for a transfer case.

I'm afraid I may never change it if I don't put in a QD.

 

[Longbob]

I posted this on another thread, but I researched the plug which is a M22-1.5. This is the drain valve that I ordered and will install. I will let you know how well it works. Also ordered the 90 degree "L" to attach a small hose to drain into a bottle.

https://www.ezoilchangevalve.com/store/p40/EZ-7B__[Thread_size_:_22mm-1.5].html

 

[roaniecowpony]

I posted this on another thread, but I researched the plug which is a M22-1.5. This is the drain valve that I ordered and will install. I will let you know how well it works. Also ordered the 90 degree "L" to attach a small hose to drain into a bottle.

https://www.ezoilchangevalve.com/store/p40/EZ-7B__[Thread_size_:_22mm-1.5].html

I think the OEM plug is tapered pipe thread.

 

[Longbob]

I think the OEM plug is tapered pipe thread.

Yes, you are correct. The OEM plug is a tapered plug. That is how it "bottoms" and seals with teflon tape or dope. The transfer case is threaded as a M22-1.5 all the way through.

There are a couple of ways that a drain plug will seal. One is the tapered plug design and another is a flat face with a washer or in this case an o-ring. I have installed the EZ drain that I referenced and it threaded properly then the face bottomed to seal properly.

It fits perfectly and doesn't leak. I have these on almost every vehicle I own plus generators for oil drains. They all seal identically with the flat face and o-ring. None of them leak plus they make oil changes a lot easier.

I will admit that this is a bit of an overkill, but it is a pain how much of a mess it makes without dropping the protective shield.

Sorry that I have two threads going on the same subject, but I am new to the board and didn't know which one I should reply to. So I did both.

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