Differential Covers...Are the marked?

[Christopher J. Bunsey]

Are the C3 diffeerential covers stamped? The restoration guide make no mention of it.

Thanks!

Chris

[John H.]

Re: Differential Covers...Are the marked?

There is no stamped identification on the rear cover - just the usual raised casting number. The only stampings (ratio and assembly date) are on the bottom flange of the differential housing, which bolts to the front of the cover.

[Wayne M.]

Top of diff carriers also stamped ....

.... at least '64 thru '65 examples I've seen. But just the ratio code, or part thereof. Example #1: '64 3.70 posi pumpkin bottom flange stamp CD 1_3_64; top (on forward slope) C, then D (D lower and to the right, obviously each struck separately). Example #2: '65 3.70 posi; bottom flange stamp FA 7_15_65; top (on 1-1/8" wide flange) "FA". Example #3: '65 4.11 posi; bottom flange AP 9_17_64; top flange, just "P" (not AP). If memory serves, a '67 AU diff that I had also was stamped "AU" on the top.