I broke my factory propshaft and went to Napa and they sold me what they called a heavy duty replacement but with no vicious coupling and they said it would be fine .I drove it before starting my restoration on my sy and it seemend fine .It looks the same as rpms shaft they have for sale my ? is what does this do to my truck is it 50/50 now or is it still awd because I know it transfers power to the most needed wheels or maybe the vs inside the transfer case takes care of this ?Any help would be great thanks guys