B12 rearend

[McGill 0]

I just picked up a B12 in nice shape. Guy said somethings wrong with the rearend. Which of my many parts tractors is the best doner? I assume the landlord 101 is about the same tractor.

[Kent 435]

B12 is same as a 2012, so a 2010 or Landlord 101 are close matches...