Hey all. My X is now at 25,000 miles and im wondering when is the best time to change all the diff and t case fluids. Ive already looked into the dealers 30,000 mile intermediate service and most dealers ive talked to are charging like an extra $100 to flush the diffs and t case. This is on top of whatever they are charging for the service itself. Have any of you changed your fluids sooner or later? Lastly, is it an easy job to do myself? Honestly, id rather have piece of mind and have the dealer do it. Besides, if they mess up, they can fix or replace at thier cost.