Tranny t-case question

Its looks very simple to drain my tranny and t-case but is it a pain to fill them while there still in the jeep? I have to replace a seal in the t-case and the fluid is almost out. The tranny shifts hard when its cold but as soon as it warms up its fine so i also wanna change the fluid in that.

The AX-15 5 speed manual transmission has a drain plug on one side of the transmission and a filler on the other side.
The transfercase has to drain and fill on the back side to the left of the rear driveshaft output.
What I use is a gear lube hand pump that resembles a large hand lotion pump; which can be purchased at most auto parts stores.

awesome, awesome, awesome! thats what i needed to know man here if there is a glitch with no other vehicle, it really sucks i like to be over prepared for the worst when i work on stuff here. Now in the tranny what did you use ive read about using 75w-90 GL3 or 4 and dextron 3 in the t-case?

Generally D4 ATF in the transfercase and GL3 rated gearlube in transmission.
I use Redline lubricants..... MT90 in transmission and D4ATF in transfercase.