rear axle codes
Safety Car
Joined: Apr 2000
Posts: 3,802
Likes: 61
From: Wichita KS
1971 Rear axle codes are as follows:
AA 3.55:1
AB 3.70:1
AC 4.11:1
AD 4.56:1
AW 3.08:1
AX 3.36:1
LR 3.36:1
Axle plant codes:
B=Buffalo, D=Dana, E=Eaton, G=Chevrolet Gear &Axle, K=McKinnon Industries, W=Warren Motive
Positraction Sources:
E=Eaton, W=Warren Gear, D=Dana
From the 1970-72 NCRS Technical Information Manual & Judging Guide 4th Edition:
"For 1971 and 1972 the stamping began with two letters for the ratio code, a letter for the axle plant, one to three numbers for the julian day of the year, a letter for the Positraction source, and a number for the shift".
Based upon that, I'm not really sure what you have. Maybe you misread some of the characters?
To post a picture open a free account on an internet file server such as Photobucket, upload the picture, then go to the uploaded picture and when you hover over it with your mouse a menu will display underneath it.
Select the IMG line and do a control c to place a copy in the paste buffer then go back to your CF thread, edit your post and select a location in the edit box and do a control v to paste the picture.
You can use right click and copy and right click and paste in place of the control c and control v.
cc
AA 3.55:1
AB 3.70:1
AC 4.11:1
AD 4.56:1
AW 3.08:1
AX 3.36:1
LR 3.36:1
Axle plant codes:
B=Buffalo, D=Dana, E=Eaton, G=Chevrolet Gear &Axle, K=McKinnon Industries, W=Warren Motive
Positraction Sources:
E=Eaton, W=Warren Gear, D=Dana
From the 1970-72 NCRS Technical Information Manual & Judging Guide 4th Edition:
"For 1971 and 1972 the stamping began with two letters for the ratio code, a letter for the axle plant, one to three numbers for the julian day of the year, a letter for the Positraction source, and a number for the shift".
Based upon that, I'm not really sure what you have. Maybe you misread some of the characters?
To post a picture open a free account on an internet file server such as Photobucket, upload the picture, then go to the uploaded picture and when you hover over it with your mouse a menu will display underneath it.
Select the IMG line and do a control c to place a copy in the paste buffer then go back to your CF thread, edit your post and select a location in the edit box and do a control v to paste the picture.
You can use right click and copy and right click and paste in place of the control c and control v.
cc
Last edited by CCrane65; Sep 8, 2009 at 08:58 PM. Reason: Add more Codes
Safety Car
Joined: Apr 2000
Posts: 3,802
Likes: 61
From: Wichita KS
As far as the stamp, if you have the tank sticker it should have a notation on it if the car was ordered with a special differential.
cc
