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**Captainfab** · 04-07-2017, 11:33 PM

Yes you do have a posi. Those are 3.90 gears. See where it says GM 10 39 8 60.........39 divided by 10 = 3.90 and those gears were made in August (8th month) of 1960.

04-07-2017, 11:33 PM	#22
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,246	Re: 1960 Eaton rear diff? Yes you do have a posi. Those are 3.90 gears. See where it says GM 10 39 8 60.........39 divided by 10 = 3.90 and those gears were made in August (8th month) of 1960. __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE