Can I rebuild my 8 3/4" myself?

It howls like a bad dog!

is this extremely difficult or can it be done at home?
Do I need special tools?

What I need:
new gears - 3:55 sure grip
Axle bearings
Axles with the 4.25" BC

Quotes I'm getting are $2100 - $2400 !!!!! Yikes!