Help ID Tracloc
If it is positively a 8.75 powerlock, it will most likely be either
The Richmond Powertrax unit
or
The Yukon PowrLok.
I'd guess the Powertrax unit seeing as you can find them anywhere. The Yukon unit is hard to find and its $120 more than the Powertrax unit.
Or it could be a Dana manufactured unit.