Hi, I have a 56 3200 I am redoing. I got a new to me 12bolt truck rear end with a tube stamp of “TPH 0403W2E” can any one decipher this for me. Only thing I am sure of is that E stands for Eaton diff and I think the 2 means second shift. There is a cast # of C250, GM 57 and Nf 3896838. There...