Hi all, been cruising through the forums here for a while but this is my first post. I need help identifying the rear end in my '73 Ninety-Eight, I've been googling to no avail and so I'm hoping someone here can get me pointed in the right direction.

It has a 12 bolt cover, the number 406028 on the lower passenger side of the diff case, the letters "BN" on the driver side, "103" on the top passenger side, and "CFD" on the bottom. I couldn't find any numbers stamped into the axle housings, but my light was fading and I've seen from photos that they can be faint, so I won't rule out that I've missed them. Any advice?

 

A friend of mine had a 74 98 that had a 12 bolt with posi but, it turned out to be a true Olds/Pont rear-end with if I can remember was a 9.2" or 9.25' ring gear and was almost impossible to find parts for or information. Very sturdy rear-end though. I would contact Yukon Gear & Axle for help.

Ray