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**WorkinLonghorn** · 02-03-2008, 04:57 PM

I know that some 3/4 ton configurations were available with a 4.57 diff. Not sure about the 1/2 tons. Jack up one wheel,turm the DS by hand 2 1/4 revs and the wheel should turn one rev with 4.57s (open diff).

02-03-2008, 04:57 PM	#2
WorkinLonghorn Senior Member Join Date: Dec 2006 Location: Studio City, Calif. Posts: 2,861	Re: 4.56 Rear Gears?!?!?!?!?! I know that some 3/4 ton configurations were available with a 4.57 diff. Not sure about the 1/2 tons. Jack up one wheel,turm the DS by hand 2 1/4 revs and the wheel should turn one rev with 4.57s (open diff). __________________ '69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, 2nd owner, Work-Truck supreme. Best $300 I ever spent. Last edited by WorkinLonghorn; 02-03-2008 at 05:03 PM.