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2blu442 · 03-28-2007, 09:37 PM

I've seen diagrams that show the difference between the rear ends used, but can't remember where I saw it. I pulled a posi rear end out from under a 1970 Vista Cruiser years ago. The car had a 455 4bbl TH400 and the rear end gears were 2.56. The housing on Vista Cruisers have different shock mounts so I don't believe they will fit in a Cutlass/442 but the guts from the rear end might interchange, but I don't know for sure. I would expect the gear ratio to be 3.08 or taller. Depending on what year the rear end is out of it may have 31 or 28 spline axles, that's something else you can check. If it is the 31 spline then those axles would be in more demand than 28's. John

03-28-2007, 09:37 PM	#2 (permalink)
2blu442 Senior Member Join Date: Sep 2006 Location: Medford, Oregon Posts: 874	I've seen diagrams that show the difference between the rear ends used, but can't remember where I saw it. I pulled a posi rear end out from under a 1970 Vista Cruiser years ago. The car had a 455 4bbl TH400 and the rear end gears were 2.56. The housing on Vista Cruisers have different shock mounts so I don't believe they will fit in a Cutlass/442 but the guts from the rear end might interchange, but I don't know for sure. I would expect the gear ratio to be 3.08 or taller. Depending on what year the rear end is out of it may have 31 or 28 spline axles, that's something else you can check. If it is the 31 spline then those axles would be in more demand than 28's. John __________________ 1964 Cutlass Factory 4spd 1965 442 4spd 1967 442 Auto 1967 Cutlass Convertible 1968 442 Auto 1969 442 W30 Auto 1970 442 4spd 1971 Cutlass Flat Top Wagon 1973 Che*vy 3/4 Ton 454/TH400 Tow Vehicle Only the tow vehicle is finished!