Armand, I scanned a couple pages on the AMC 20 rear-ends with this type of info from Dick Datson's "The AMC Survival Book" that I have here.It is 4 image scans range from 77k to 211K file size I think. I believe it indicates the 2.73 diff is only is for the 7 9/16" rear end for both STD and TwinGrip.. It is not shown in spec for the 8 7/8" rear end. It shows as being 15/41 tooth gears for the 7 9/16" which muct be the AMC 15 Rear. Let me know if you want the scans of that Dick Datson Info. ______________________________________________________________ Ralph Ausmann - Hillsboro, OR - > <ralph.ausmann@xxxxxxxxx> http://mysite.verizon.net/res79g4m/ ----- Original Message ----- From: "Armand Eshleman" <aje1@xxxxxxxxxxxxxxx> Subject: [Amc-list] 2.73 ratior model 20 carrier 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