Rear diff coding issue
Thread Starter
Navigator
Joined: Aug 2017
Posts: 9
Likes: 0
From: Franklin CT
Rear diff coding issue
Yes, another rear diff code question. This is in a current c2 refresh I am doing, though I have the original to install, I would like to find what this coding means. I have found a plethora of information on here and the www but I can not find the CAB code anywhere for 1970. I have attached a picture of the stamping (1 CAB 7 31 70 W) Any help would be appreciated.
Drifting
Joined: Nov 2013
Posts: 1,546
Likes: 281
From: Scottsdale Arizona
From what I found in my restoration book everything with the stamp looks correct except the CAB. I get 1st shift, July 31, 1970 at the Warren motive plant. Do you know what the gear ratio is? Maybe it was stamped incorrectly?
Team Owner
Joined: Sep 2006
Posts: 31,160
Likes: 4,241
From: Westminster Maryland
Hi,
I'm wondering about a differential produced on the last day of July 1970 having a 3 letter code…..it wasn't likely that it was going into a 70 model year Corvette was it?
It seems more likely it was going to end up in an early 71 car?
When did the axle plants begin assembling 1971 model year differentials?
???
Regards,
Alan
I'm wondering about a differential produced on the last day of July 1970 having a 3 letter code…..it wasn't likely that it was going into a 70 model year Corvette was it?
It seems more likely it was going to end up in an early 71 car?
When did the axle plants begin assembling 1971 model year differentials?
???
Regards,
Alan
Last edited by Alan 71; Aug 17, 2017 at 03:43 PM.
Thread Starter
Navigator
Joined: Aug 2017
Posts: 9
Likes: 0
From: Franklin CT
I believe all 1970 and even late 69 had a 3 letter code and 1971 went back to a 2 letter code. Unless the format changed and the C has a different meaning in 1971 because there is a code AB.
Team Owner
Joined: Sep 2006
Posts: 31,160
Likes: 4,241
From: Westminster Maryland
Hi Bill,
My point was the date when this differential was assembled…. why was the plant building 1970 differentials on the last day of July 1970?
Was the intent to stamp it AB for the start of 1971 production but instead it got stamped CAB?
Regards,
Alan
My point was the date when this differential was assembled…. why was the plant building 1970 differentials on the last day of July 1970?
Was the intent to stamp it AB for the start of 1971 production but instead it got stamped CAB?
Regards,
Alan
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Team Owner
Joined: Sep 2006
Posts: 31,160
Likes: 4,241
From: Westminster Maryland
Hi Bill,
"1970 has engine codes that go through July so it isn't unfeasible"
So this differential assembled in the last day of July, made it to St.Louis on the same day to be installed in a 70 model year car….. or are you saying that some 1970 model year cars were assembled in St.Louis during the beginning of August of 1970???
Regards,
Alan
"1970 has engine codes that go through July so it isn't unfeasible"
So this differential assembled in the last day of July, made it to St.Louis on the same day to be installed in a 70 model year car….. or are you saying that some 1970 model year cars were assembled in St.Louis during the beginning of August of 1970???
Regards,
Alan