8.75 sure grip - question

Need more info. Is it a 489 housing? They made two different spline yokes, 10 and 29. If they are 489 than yes they have crush sleeve.

I mis-spoke. Mines a slip diff. The sure grip has bee gone thru with backlash setting friction discs, and seals. I think it's a 741 based on the casting #. I been out of the loop for 35 yrs. Forgot the little that I did know. Appreciate the help guys. I'll attach pics.

IMG_0113.JPG

IMG_0114.JPG

IMG_0115.JPG