What"s the socket size for the NP 208 fill plug? I tried to remove mine this afternoon with the biggest crescent wrench I had, but it wouldn't budge (so I call bs on the previous owner's claim that he checked the fluid level in the transfer case)!
My transmission fluid level was +1 pint low on the dipstick, so I'm leaning towards transmission being source of my ATF leak......until I can check fluid in the transfer case.
Also, noticed that my rear drive shaft slides freely in the caps at the rear diff, is that normal?
On a side note, so many things are loose on my '84 M1028......pintle hook at rear bumper was loose (I removed it since I don't need it and need a step on the bumper instead), and the spare tire carrier was loose as well (aired up the spare and tightened all the mounting hardware), and the front battery mount through the right front fenderwell was loose (tightened that as well).
Will soon install a new harmonic balancer and hope that contributes to removing vibration issues.