I was able to hand my old gaskets to my parts guy at Carquest and the brought my 4 new ones within an hour... 2 to use and 2 to loose!
I would imagine that a locking plate was accidentally left on and someone at some point didn't notice it and they added another one. Maybe things were removed and very greasy and the locking plate wasn't noticed. Also make sure the bolts are not to long. Maybe someone added a locking plate to accommodate a longer bolt(s) for one that was lost.
I'll see if I can locate those two new lost gaskets and get a number for you. They should always be replaced when you pull the axle.
When I am in the garage tomorrow I will check the bolt lengths from the right side to the left side. Though I think they are the same. Though the locking plate is only about 1/16" thick.
Do you think it will be ok to only use one lock plate on each side?
