I got the donor case took apart. I cleaned and bead blasted the reduction housing. MC07-R10 #313 installed. Had a little issue with the left side shift rail. The shift rail was real tight, so I called MC. I talked with rocky. He told me to tap the shift rod back an forth with a hammer to loosen it up. Did that and add a little grease.... worked like a champ. Good OL lucky #313 LOL. Next job pull the T-case and trany to install the 4.7 gears. While I have the trany out, I have some seals that need attention.