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FED 387 · 01-26-2011, 03:44 PM

The ORIGINAL rear end that came from GM was a 3:31 open gear---that is not to say that somewhere down the road it has not been changed to either a POSI or an entirely different ratio--- but as originally manufactured it was a 3:31 open ---sounds like ya got a posi in there whats the numbers on the gears???

01-26-2011, 03:44 PM	#6
FED 387 VIP Member Join Date: Jun 2006 Posts: 3,420 Likes: 529 Liked 333 Times in 180 Posts	Re: chev 12 bolt The ORIGINAL rear end that came from GM was a 3:31 open gear---that is not to say that somewhere down the road it has not been changed to either a POSI or an entirely different ratio--- but as originally manufactured it was a 3:31 open ---sounds like ya got a posi in there whats the numbers on the gears???