It is the qf5v or something. It says 500slc, which is the 450slc 5.0.
There is a 4th diff that they sent me and they do not know what it goes to.
Other than the 500slc one, all of them have the casting number off the carrier that is not the actual part number, such as 220 353 -----. I also have found this type of number on both the 129 differential carriers.
I am astounded that Quaife makes products that it has no idea what the application is. Their response has been that someone sends them a carrier and they make a unit. They do not know what it goes to.