I don't know the specifics as to who claims what in these things. I do know that Auburn Gear makes diffs for all three major rears now, but as to the origins of the names, etc., beats me. Looks like they all pretty much make parts etc for each other nowadays.Moparman440 said:I thought that the cone type Mopar Sure Grips were made by Borg Warner, and the clutch types by Dana. Does Auburn rebuild the Borg Warner Sure grips?