I have a 99 Grand Limited, 4.0 quadra trac II and tomight it started vibrating only when the tires are losing traction in low gear. Spinning in snow. I have an idea I could get a little more life out of the T-case if I changed fluid, but I hate the AWD. Question is, what would I need to swap in a NP 242 case?

What transfer case will bolt up in place of the NP 247???