Thanks Andy and Frank for responding to my questions. Unfortunately I still have no why to identify what carrier I have. It is a twin grip or trac lok as the Jeep version is called. It has the square large opening in the side of the carrier where the twin grip internal parts are installed through. Is there a way to identify which carrier/differential assembly this is?? How can I determine if it will fit the 2.73 ratio or the 3 series?? Thanks, Armand _______________________________________________ Amc-list mailing list Amc-list@xxxxxxxxxxxx http://www.amc-list.com/mailman/listinfo/amc-list