This is bad.

I am guessing one of two things. #1 one of your new bearings is pressed on cocked or the axle was bent while pressing it on, or #2 the housing is bent or tweaked, but you didn't know it before because the old tapered roller bearings, when the end play is adjusted, have play in them which allowed for the axle to still turn in a bent housing.

Pull the axles one at a time while leaving the opposite one in to see if you can determine that the problem is related to only one side, or only happens with both axles installed.