1969 rearend????????????????

[Keith G.]

I have a 390 hp with 4 speed, the #s are hard to rear, looks like AT 222 E 1 or AI 222 E I, can that be original? thanks.

[Edward B.]

Re: 1969 rearend????????????????

Keith, can you post a picture? The "AT" (and "CAT" for late 1969 through 1970) code was used from 1965-1970 for a 3.08 Posi (heavy duty), but that date format is 1971 and later, and there wasn't an "AT" code used those years. The date format used from 1965-1970 would be something like "2 AT 4 22 69 W" (3.08 Posi assembled on April 22nd, 1969 at the Warren, MI plant, 2nd shift).

Here's an example (4.11 Posi assembled on August 7th, 1969 at the Warren, MI plant, 2nd shift)

Ed