okay did anyone remvoe the housing or anything during the install?
what diff did you buy?
any other suspention upgrades?
I just did mine and I have no extra noise. I can't think of any reason a diff could cause noise over a bump. I would get under the car and start looking for play in something that would cause contact when going over a bump.
with new axles you calipures and tone rings and stuff have to come off. I would just instect the car for sings of contact between objects of play in the axles.