Axle Code
Thread Starter
5th Gear
Joined: Apr 2012
Posts: 5
Likes: 0
Axle Code
Recently bought a 72' Cuope and the rear axle code does not seem
to be in the location everyone says it should be-- namely between
the spring retainer plate and strut plate. There is a space of ~1"
between these two plates but with rigorous brushing, there seems to
be no code there. Any help would be greatly appreciated. Rob
to be in the location everyone says it should be-- namely between
the spring retainer plate and strut plate. There is a space of ~1"
between these two plates but with rigorous brushing, there seems to
be no code there. Any help would be greatly appreciated. Rob
Team Owner
Joined: Sep 2006
Posts: 31,270
Likes: 4,362
From: Westminster Maryland
Hi Rob,
I believe you're looking in the right place.
Does the case seem like it's ultra rusty and pitted?
Good Luck.
Regards,
Alan
Something like this? This case, from a 71, was hardly rusted at all, but you can see the stamping is still pretty light.
I believe you're looking in the right place.
Does the case seem like it's ultra rusty and pitted?
Good Luck.
Regards,
Alan
Something like this? This case, from a 71, was hardly rusted at all, but you can see the stamping is still pretty light.
Last edited by Alan 71; Apr 18, 2012 at 05:30 PM.
Race Director
Joined: May 2006
Posts: 18,730
Likes: 2,581
You can also determine the ratio by turning a rear wheel one revolution and observing how many times the drive shaft turns. The code will only tell you what the factory put in, it wont tell you if a previous owner changed the ring and pinion.
CF JASOC Member
Joined: Feb 2006
Posts: 8,040
Likes: 34
From: Downtown Annapolis, MD. The Future is where we all have to live. Let's not screw it up.
St. Jude Donor '08-'09-'10-'11
Here's the one off my '71 350/270 4spd - LRW 213 E 2.
LR (3.36), Warren Axle Plant, Julian Date 213, Eaton Positraction, 2nd shift
Not as clean as Alan's, but nothing of mine is.
LR (3.36), Warren Axle Plant, Julian Date 213, Eaton Positraction, 2nd shift
Not as clean as Alan's, but nothing of mine is.
Melting Slicks
Joined: Aug 2008
Posts: 2,200
Likes: 3
From: Lehigh county Pennsylvania
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Thread Starter
5th Gear
Joined: Apr 2012
Posts: 5
Likes: 0
C3 Differential
Appreciate the observation and it would have been great if you were correct in my case. But, I've removed the layer of rust/scale/whatever from the area in question without revealing the code. There is some evidence of a stamping although I can only discern one or two characters. Apparently, the original stamping procedure was so lightly
performed, the code has all but disappeared. My best course now is to
use the method of spinning the wheel one revolution and observing the number of drive shaft turns. Thank you very much for answering my post.
performed, the code has all but disappeared. My best course now is to
use the method of spinning the wheel one revolution and observing the number of drive shaft turns. Thank you very much for answering my post.
CF JASOC Member
Joined: Feb 2006
Posts: 8,040
Likes: 34
From: Downtown Annapolis, MD. The Future is where we all have to live. Let's not screw it up.
St. Jude Donor '08-'09-'10-'11
If you just want the ratio, work on the end closest to the passenger side for the first 2 characters which will be Letters.
AA-3.55
AB-3.70
AC-4.11
AX-3.36
LR-3.36
AW-3.08 (unlikely, but possible).
I used Brake Cleaner on mine, since it's clear and evaporates quickly for less mess, and a tooth brush. Good luck.
Mark
AA-3.55
AB-3.70
AC-4.11
AX-3.36
LR-3.36
AW-3.08 (unlikely, but possible).
I used Brake Cleaner on mine, since it's clear and evaporates quickly for less mess, and a tooth brush. Good luck.
Mark
