[C2] Rear Diff code read
Le Mans Master
Joined: Apr 2000
Posts: 5,098
Likes: 1,351
From: New York New York
2024 C1 of the Year Finalist - Unmodified
2024 C2 of the Year Finalist - Unmodified
2023 C2 of the Year Finalist - Unmodified
2023 C1 of the Year Finalist - Unmodified
AW = 1971 3.08 rear
Race Director
Joined: Oct 2000
Posts: 12,657
Likes: 3,117
From: Shamong, NJ
"AW" is a 3.08 rear from 68-69, 71, or 73-75 ("CAW" was a 3.08 in 70 and no "AW" in 72 because the 3.08 wasn't offered). "110" is the Julian date for 110th day of the year, "E" is Eaton (the Posi maker) and the "1" is the first shift. The case will have a date cast into it which will tell you the year.
It's hard to tell from the picture but a digit seems to be missing. Normally there's a "W" between the ratio code and the Julian date to identify the rear as coming from Warren MI. Is it possible that there's another "A" in front of the "AW" (making the axle code "AA"), this would mean the rear's a 71-75 3.55?
It's hard to tell from the picture but a digit seems to be missing. Normally there's a "W" between the ratio code and the Julian date to identify the rear as coming from Warren MI. Is it possible that there's another "A" in front of the "AW" (making the axle code "AA"), this would mean the rear's a 71-75 3.55?
Tech Contributor
Joined: Aug 1999
Posts: 15,156
Likes: 3,965
From: Connecticut, USA
It is not the original diff, so you figure ratio by counting the pinion to axle turns, but you won't know how it is built unless pull the cover and take a look at the gear date code, posi case type, and if any work was done to it.
