Actually, the drain and fill plugs on this chain driven transfer case are on the back end. No problem with them.
Now, in the daylight, I see what I mistook in the near dark as an additional drain plug; definately not a drain plig.
However, for your information, the R150F transmission has a 15/16 drain hole near the bottom of the transmission that faces the passenger side (front drive shaft side) and is 13 1/2 inches back from the front of the bell housing.
The fill hole is 15/16 on the drivers side of transmission, about 1/4 to 1/3 up the side, and 13 1/2 inches ffrom the front of the bell housing.
I have used Redline MT90 (75W-90, GL-4) synthetic gear lube in several transmissions. Shift is smooth and runs quiet. Use Mobil 1 (75W-90, GL-5) in differentials for many years. Have had no problems; very minor oil seepage around gaskets, no seal leakage.
Thanks for your time!