[lemans 664]

hi who can tell me what axle I have in my 66 gto it is casting #9783393 with a casting date of c306. It should be a YE code with 3.08 posi. heres the problem I only find a SC code on the right tube and its upside down and backwards, so it looks like a backwards C and a S. It has 3.08s but its a open rearend, Olds had a sc code non posi 66 but not sure if it would be same casting, it also had 3.08s Is there anything on the carrier that makes it a pontiac or olds . thanks for any help

[Brian D'Amico]

The best way to find out is to open the cover and count the teeth on the ring and pinion. Let us know what you find.

[lemans 664]

Hi thanks for the help brain. What im really trying to find out is this housing a pontiac housing or a olds housing , or a missed stamped pontiac. Not all GM housings looked the same, buicks had a different carrier section. Im restoring a 66 gto and im not sure if I should go ahead with this rearend. Agian thanks for any help.

[merlotgoat]

That's the correct casting number for a '66-'67 Pontiac. Apparently, the same casting was used on "A" and "F" Bodies. The axle tubes were different lengths to fit the bodies. I found the info. by doing a Google search for 9783393 rear end.