Can easily be done at home. Only basic tools needed aalpng with a catch pan. New gasket usually comes with filter. You will also need some sort of fluid pump with a hose...under $10 at harbour frieght. You need to support the tranny/tcase, drop the cross member, remove pan bolts to change the filter (after draining fluid of course). Filter is held in with 2 or 3 bolts. Clean old gasket material off, new gasket, put all back together...don't overtighten pan bolts. Refill fluids per manual....proper proceedure has been posted a ton of times on here.
Have fun!