![]() I could make the swap in about an hour including bleeding the brakes. It was nice to have 2 rear ends that I could swap back and forth. When I got back home I swapped back to the 4.10's. I bought that rear end because I had a 4.10 posi in my '68 and had a job where had to travel sometimes. ![]() I don't know about the other GM cars from that era. I'm sure that a 12 bolt rear end in any '68-72 El Camino, Chevelle or Monte Carlo will fit your '68. ( 1968 ) U15 Heavy - duty battery Instrument panel gauges Speed warning. I bought a compete 12 bolt rear end (brake drums and all) from a junk yard that came out of a low mileage '70 Monte Carlo for $100 (in 1975) and it fit perfectly in my El Camino. rear axle ratio ( 1969 ) 787-788 Red Vinyl Malibu G92 3.08 : 1 rear axle ratio. ![]() This is the original rear end and axles that this car came with. I don't know where you are taking your measurement but the 12 bolt rear end in my '68 measures 61" from the outside of one axle to the outside of the other axle flange. This code will tell you the ratio, whether it is posi or. Codes below are for Chevelle & Monte Carlo. The casting numbers/letters on rear end housings may have either a prefix or suffix of 'N' or 'NF' and no reason has been found yet why they may have one or the other. The gear ratio codes are located on the front passenger side of the differential as shown in the illustration below. 12-Bolt Casting 3969278 - very early 1970s have been reported with 3959038 units. ![]() Using the charts below, you will be able to learn alot about the rear differential in your classic full size Chevy. I hope you are looking for a 12 bolt rear end. 1958-1970 Chevy Rear Differential code Identification. The rear axle identification code consists of a two letter prefix indicating the gear ratio, four digits indicating the assembly date as month/day, and a single letter suffix indicating the manufacturing location. I kind of leery of buying used parts without knowing what vehicle they came out of. Q: What is the bodystyle of the 1968 Chevrolet El Camino A: The 1968 Chevrolet El Camino was a Coupe. Choose top quality brands Dorman, Motive Gear, Richmond Gear, Spicer. Too bad you don't know what vehicle it came out of. Q: What is the length of the 1968 Chevrolet El Camino A: The 1968 Chevrolet El Camino has a length of 208.00 inches. Buy a 1968 Chevrolet El Camino Differential Ring and Pinion at discount prices. ![]()
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