posi rear help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

TireSmoke420 · 08-20-2005, 02:00 AM

i wanna swap my 1 legger to a posi. how wide are the rear axels on a 69. are there any other cars that use the same width. like if i find a posi unit from a chevelle or sumthing on ebay. what works guys i know sumone should know

TireSmoke420 · 08-20-2005, 02:25 AM

nevermind guys found the threat i was trying to find with the widths. sumone posted saying 55 1/2 inches and 57 for 70-72 this sound right everyone

beautimus · 08-20-2005, 10:39 AM

just a little fyi
car rear ends are different from truck rear ends.
a car 12 bolt rear is different from a truck 12 bolt. so you gotta have a truck setup. also i think there are different carriers for different axle ratios.
dont take this as gospel but i think if you have a 3 series posi setup you can have 3:08 to maybe 3:55 gears and a 4 series carrier can get you 3:73 to maybe 4:88 gears. some one who knows for sure chime in and say for sure
also i think there are 2 different axle widths in the 67-72 models. again maybe some one here knows the low down on it. hope that helps some.
Tony

08-20-2005, 02:00 AM	#1
TireSmoke420 One of the few GMC'ers Join Date: Jul 2005 Location: Des Moines, Iowa sometimes Butler, PA Posts: 146	posi rear help i wanna swap my 1 legger to a posi. how wide are the rear axels on a 69. are there any other cars that use the same width. like if i find a posi unit from a chevelle or sumthing on ebay. what works guys i know sumone should know __________________ 87' Silverado 4x4 "Young, Dumb And Full Of Cum"

08-20-2005, 02:25 AM	#2
TireSmoke420 One of the few GMC'ers Join Date: Jul 2005 Location: Des Moines, Iowa sometimes Butler, PA Posts: 146	nevermind guys found the threat i was trying to find with the widths. sumone posted saying 55 1/2 inches and 57 for 70-72 this sound right everyone __________________ 87' Silverado 4x4 "Young, Dumb And Full Of Cum"

08-20-2005, 10:39 AM	#3
beautimus Registered User Join Date: Mar 2002 Location: woodstock, alabama, usa Posts: 938	just a little fyi car rear ends are different from truck rear ends. a car 12 bolt rear is different from a truck 12 bolt. so you gotta have a truck setup. also i think there are different carriers for different axle ratios. dont take this as gospel but i think if you have a 3 series posi setup you can have 3:08 to maybe 3:55 gears and a 4 series carrier can get you 3:73 to maybe 4:88 gears. some one who knows for sure chime in and say for sure also i think there are 2 different axle widths in the 67-72 models. again maybe some one here knows the low down on it. hope that helps some. Tony __________________ i survived cancer and kidney stones, but my kids are killing me.

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