No seals to worry about unless the new tranny or old t-case is leaking as both are sealed self-contained units. You'll need an E-10 and E-12 extended Torx-head socket adapter too. Two E-12 bolts at the top hold the tranny to the engine and one (IIRC) E-10 at the top holds the t-case to the tranny. Otherwise it's a bolt-up process if you're just replacing an AX-15 with another AX-15, there is no sealing of the tranny to engine or t-case to tranny to worry about.
I hope you are replacing the clutch and throwout bearing while it's all apart, unless the clutch has very low miles on it.