[f5fstop]

I guess I would have them explain "dirty." That fluid, like engine oil, tends to look dirty after a few thousand miles, but it is still good. Then are they talking about the fluid inside looking dirty, or outside?
If you want to get it changed, have them pay half for your aggravation of having to bring it in just to get some bolts tightened, that should have been tightened by AAM when they shipped the rear axle to the plant.