ClassicOldsmobile.com - View Single Post - Full Size posi carrier reconditioned and ready to go

jhoppeolds · 09-30-2007, 08:31 PM

Hello. If this posi unit had 3.08 gears on it originally it will only accept 2.73, 2.93 and 3.08. It appears from your pictures that this is a "P" style carrier used in 1965 and some 1966 and 1967 full-sizes (1966 and 1967 full-sizes can have Pontiac or Oldsmobile built rear axles). Should have '153' cast on it. Carriers for 2.41 and 2.56 have '152' cast on them. Olds full-sizes never had these gear ratios in the 'P' style rear axle (only later in 'O' style) and you would have to get the 2.41 and 2.56 along with the carrier from a full-size 1965-1970 Pontiac rear end (the guts will fit the Olds housing but the whole rear will not). Carriers for 3.23 and 3.42 (and numerically higher in a Pontiac) have '148' cast into them.

09-30-2007, 08:31 PM	#2 (permalink)
jhoppeolds Junior Member Join Date: Jul 2007 Posts: 16	Hello. If this posi unit had 3.08 gears on it originally it will only accept 2.73, 2.93 and 3.08. It appears from your pictures that this is a "P" style carrier used in 1965 and some 1966 and 1967 full-sizes (1966 and 1967 full-sizes can have Pontiac or Oldsmobile built rear axles). Should have '153' cast on it. Carriers for 2.41 and 2.56 have '152' cast on them. Olds full-sizes never had these gear ratios in the 'P' style rear axle (only later in 'O' style) and you would have to get the 2.41 and 2.56 along with the carrier from a full-size 1965-1970 Pontiac rear end (the guts will fit the Olds housing but the whole rear will not). Carriers for 3.23 and 3.42 (and numerically higher in a Pontiac) have '148' cast into them.