I just recieved my rebuilt tranny back. The old one was toasted and the fluid in it was a nice brown baked color. What is the best way to get out all the old fluid from the coolers? I was thinking using a air hose, but umm......

 

Make sure reusing the old one won't void your new warranty. Otherwise, I have sprayed a can of carb cleaner in it (removed from the grill), let it soak, then flushed a couple times with tranny fluid. Got a heck of a lot of crud out and seemed clean as far as I could see in there. You'll need to flush the lines too. Even if you "think"you got everything out, you might change the filter again after a couple long drives. If the tranny shop finds you've reused this stuff, they may not honor any warranty though.