Stripped transfer case threads - repairable?

i figured this would be the case - and i think i probably removed 95% or more of them

 

seems to be working out well, tapped both up to 20mm. the drain plug is solid. fill plug seems to leak very slightly though. im using the cheap o ring that came with the bolt at the shop, not sure what material it is. any reccomendations? plumbers tape on the threads? rubber o ring? crush washer?

 

I’d try to find a 20mm fibre washer or soft aluminum crush washer.

 

A little dab of silicone sealer on the threads near the head will seal it right up. I like the import grey stuff.

 

I guess you either didn't read or chose not to heed my advise to spend $1 or so for a small package of the oil drain plug thread sealer they sell at Advance, AutoZone, etc.

I'll tell you again.

It works.

JL

 

Now that's just plain irony right there.