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Discussion Starter · #1 ·
Did ALL 1970 SS (L34) cars come with 3.31 gears (except for dealer installed 4.10s)? I found a source that states this, but my rear end (which is supposed to be original) does not decode to a 3.31.

Here's the problem with my rear end...

The axle code I read off the rear end is CN 1108 B. This decodes as a 1969 Chevelle 2.56:1 axle, built at the Buffalo plant on November 8. It IS a 12 bolt rear end. However, November is a 1970 production month...but the rear end code for a 70 should read CCN for a 1970 Chevelle 2.56:1 rear end. Now, my car's engine and transmission are numbers matching (correct codes and partial VINs...and they are not re-stamps), and the rear end is supposed to be as well (I have spoken with 3 of the 5 previous owners, and none changed the rear end). Here's the problem...the car's build date is the 2nd week of July! How would a November assembled rear end (with 1969 coding) end up in a July car? Or would it?

Sorry so long...

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1976 Type LT Restification (in progress)

1968 2 door sport coupe...the toy!

1971 Camaro RS, all original, 1 owner...wife's baby!

1970 Chevelle SS 396 (L34) all original...and it shows, too!

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Discussion Starter · #2 ·

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You may want to repost this in the "tag team" forum-that's where the tags and ID experts hang out.
 

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I hope this makes some sense for you, I know a guy that retired GM LA(assembly line)and we got talking about matching numbers and so on, he said that the matching numbers and dates were a crock of sh!!. it all amounted to supply on hand, lets say they were building a car and it was a 350 300hp and it was suppose to have say 487 heads on it, but they ran out, they would not stop the assembly line they would use a differn't number head it might even be some 462 left over from the year before, and the last thing they would worry about was date code they might have one head made in Nov. and another made in Feb.

The same held true with rear ends and even more so because of the bulk and weight, when a delivery of rears arrived it got put were ever there was room, and when they were brought in for use there might not be a real specfic order that a material handler moved them to the assembly line.

There was NO WAY that the line would be stopped because they ran out of material of one type, he told me that if they ran out of lets say 10 bolt rears they would just start putting in 12 bolts, and that held for a lot of things thats why the dealer was always making changes for a customer, a car was suppose to have SS badges, and did not factory might have been out so they just sub.

I feel that way too much is made about dates & matching numbers as these cars were just assembly line things and built long before computers and the quility control of today.

I have a 69 Roadrunner and it is a survivor that I bought new in 69, I had some warranty work done on it in 70 they had to change one of the heads and trans do you think they even cared about date codes, I know they did not, does this make this car a non original.

Hope this helped, you can have all the GM code brakers and people WHO think they are in the know, but to me they did not work on the assembly line and have NO idea what went on day to day on the assembly line.

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Nothing like a 11 sec car.
 
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