hey what do i use to clean out the diffs with....im mean clean out the oil that is
if im ganna put diff weights in it

I always empty the gears, seals, o-rings and shims out of the diff case and wipte all of them down with paper towels to get the excess diff fluid off. Once I get the bulk of the silicone off I spray them with [link=http://www.southeastrc.com/item/HPI9062]THIS[/link] engine cleaner/degreaser and assist with a toothbrush. After that I spray everything down with WD-40 and wipe everything clean with a few new sheets of paper towel. Then just re-assemble and fill with your diff fluid of choice. It usually takes me about an hour to do all three.

Make sure to put a towel down because that silicone oil has a way of getting everywhere.

you can blow the gears and diff out w/ a air compressor. i hold them in a towl and blow them after i spray them w/ nitro spray. you dont want any carb or nitro spray left in there when you put it back together. check the o-rings also. even if they look fine compare them to new ones for the diameter. they strech and then youll have a leaky diff.

k thx guys
but when you say carb spray will THRUST work