Rearend gears

[64R]

Does anyone know what the rearend gear possibilities are for a 64? I'm rebuilding the motor so before sorting out the cam specs I should figure it out, I'll jack it up and give it a spin so I should be close, just nice to know what I'm looking for.

Thanks

[Lapham3]

Usually 3.07-sometimes 3.23 rarely 3.42 almost never 3.91 once in ten lifetimes 4.45

[64R]

Thanks, I would guess it's the 3.07 by driving it, possibly 3.23 but certianly not taller, I just had no idea what possibilities there were for it. I'll do the spin and count to be sure.

[RivNut]

The ratio is stamped on the bottom of the axle housing with two numbers - one above the other. Example: 3 over 2 is 3.23; or 2 over 78 is 2.78. Ratios available for '64 (all models): 3.07; 3.23; 3.42. An X in a circle identifies it as a posi. As stated earlier, chances are its a 3.07 or 3.23. I don't know if the transmissions were coded for rear end gears in '64. They were in '65. B is the first letter for all 400's. The second letter identifies either the engine, the shifter (column or console), or perhaps the rear gear as well. The transmission tag is on the passengers side. Painted and stamped with year and code.

Ed

[64R]

Thanks Ed, I'll climb under in the morning and have a look, I don't know how you know all these things but I'm darn happy you do

[RivNut]

Sent you a PM,

By the way, what's your name? You know me, Tim, Jim, and a bunch of the other Riviera owners, but you're still an anomoly out there.

Ed

[64R]

I'm Rob, 2 time Riv owner, I had a 63 about 25 years ago and always regretted selling it, finally got the 64 a couple years ago so I feel complete again