It would be best to change the front diff fluid too. But you are going to have to buy a small siphon pump from an auto parts storeun less you already have one, and spend the couple of extra dollars to get a good one!. This is the only way to do it unless you want to drop the hole axle and replace the gasket, no need unless it is leaking. To do it with the siphon, you will have to go in from the fill hole with is on the drivers side, kinda hard to get to, but of course you'll have to shove the hose down in there. I had a little bit of a hard time getting it in there very far because you have to get it past the carrier a ways, but it's not to bad. You won't get 100% of it out, but you will get most of it. I also found it was easier to use the pump to get the new in instead of trying to use the bottle. As for the brake fluid, i never have on any of my vehicles. I wouldn't unless you've had a leak somewhere that you have had to fix or you have to bleed your brakes very often showing that there is a small leak somewhere. Hope i've helped some, good luck!
Happy trails!!
