rear differential codes
Safety Car
Joined: Apr 2000
Posts: 3,802
Likes: 61
From: Wichita KS
AA 3.55:1
AB 3.70:1
AC 4.11:!
AY 2.73:1
AW 3.08:1
AX 3.36:1
LR 3.36:1
301 is the julian day of the year it was manufactured (September 20th)
The E indicates the posi unit is from Eaton and it was produced on second shift.
Since you have a W I'm going to guess it is actually AW and that you did not see the A to the left of it.
The letter immediately following the axle ratio is for the plant it came from. There is no V but there is a W for Warren Motive. The V looks like the second half of a W so it could easily be a W.
My 72 has what looks like a V also in the plant designation position.
So, it looks like you have a 3.08:1 ratio from Warren Motive made on September 20th 1974 with a posi unit supplied by the Eaton plant second shift.
cc
