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Discussion Starter · #1 ·
I have an opportunity to pick up a 1969 4.10 posi in good shape. My '70 LS6 came with a factory 4.10 posi that was lost years ago. I want the 4.10 posi back.

Are there any differences that I should be aware of between a '70 and a '69 4.10 posi rear?

Plus, since my car was built in the 3rd week of January (70), wouldn't it be most likely the rear was built in 1969?

The vendor says the rear is from an L78 car and is original. Are there any easy ways to identify this piece? (I have asked for the numbers and already have looked in the tech section on rear ends)

Thanks a bunch!

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1970 LS6
 

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If that's a 1969 4.10 factory rear,the code should be "KK"..1970 is "CKK" I believe..I'd bolt it right in and wouldn't think twice about it.

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1970 Chevelle SS396/M21/4.10 My 70 SS396
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1970 Chevelle SS454
1968 Oldsmobile Cutlass convertible
1982 Oldsmobile Cutlass 350 Olds,TH350(daily driver)
Chris Corwel,TC Member 785
 

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I don't think there is any difference either.However if the code is KQ..I would highly suggest getting it fast.That is the code for a 1969 Chevelle Copo 4:10 Heavy Duty rear end.


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Rick Peters
NCOA#1670-ACES#175
1970...ON THE MOVE
 

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Discussion Starter · #4 ·
Thank You!! I have the code now and it is KK0206B. Any suggestions?



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1970 LS6
 

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That is a 4:10 February 6th date.Buffalo plant.11 months is to early for your Jan.70 Chevelle if you plan to be Concourse correct.But I say get it if the price is right and put it in your car.You can use it as trading bait if you change your mind.

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Rick Peters
NCOA#1670-ACES#175
1970...ON THE MOVE
 
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