AK Coded Differential???
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From: Easton, PA
St. Jude Donor '10
AK Coded Differential???
I have a 1969 AK coded differential which acts very differently then I am used to on a Corvette. Called a "standard" versus a "positraction" I wonder if any of you have come across these before? Date coded 10-21-68 it also has a "1" in front of the "AK" and a "W" at the end. So, 1AK 10-21-68 W. It also has HD yokes.
Why would this be used on a 327 Corvette in 1969? Can you educate me please?
Thank you.
David Howard
AllVettes4Me
Why would this be used on a 327 Corvette in 1969? Can you educate me please?
Thank you.
David Howard
AllVettes4Me
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I have a 1969 AK coded differential which acts very differently then I am used to on a Corvette. Called a "standard" versus a "positraction" I wonder if any of you have come across these before? Date coded 10-21-68 it also has a "1" in front of the "AK" and a "W" at the end. So, 1AK 10-21-68 W. It also has HD yokes.
Why would this be used on a 327 Corvette in 1969? Can you educate me please?
Thank you.
David Howard
AllVettes4Me
Why would this be used on a 327 Corvette in 1969? Can you educate me please?
Thank you.
David Howard
AllVettes4Me
Melting Slicks
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2024 C3 of the Year Finalist - Unmodified
69s did not have 327s. Is the diff original to the car? What do the docs say...window sticker, build sheet, POP?
Last edited by Faster Rat; Aug 28, 2017 at 07:16 PM.
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St. Jude Donor '10
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Thread Starter
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St. Jude Donor '10
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From: Massapequa Park NY
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According to 69corvette.com, the Posi axle [RPO: G81] was an option and had a $46 cost if you opted up for it. Almost 37,000 of the almost 39,000 total '69s built, were ordered with Posi so it was quite popular.
My 350/300 coupe was one of few without Posi also [AK code].
Now that I know this, I can feel the tug on the left rear when I gun it, and can feel it brake free and chirp between gears.
My 350/300 coupe was one of few without Posi also [AK code].
Now that I know this, I can feel the tug on the left rear when I gun it, and can feel it brake free and chirp between gears.
Last edited by Bergerboy; Aug 28, 2017 at 09:46 PM.
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I read on the form that even though a cheap option some ordered diff without posi to save $50. Hard to believe but I am sure there were some base models that had to be aken by dealer to get others so few out there.
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Positraction was optional for 68 and 69 and could be a mandatory option depending on the transmission choice (TH400). Posi became standard beginning with the 70 models.
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St. Jude Donor '10
Had to be a reason but maybe that reason died with the GM engineers.
Appreciate the thoughts.
David
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We need to ask some of the road race guys. I also saved some old race car features in the old Corvette cars and parts magazine. I need to look and see what they had in them.
Bill
Bill
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St. Jude Donor '10
LOL. Neither were all the Mustangs and Camaro's; but look what lasted through the years and which options people are seeking in their classic Corvettes today.
Haven't yet seen an add that says "put in this new open transmission, it will offer you a smoother, more comfortable ride in your Corvette". Just too funny, but I do understand what you are saying...
Haven't yet seen an add that says "put in this new open transmission, it will offer you a smoother, more comfortable ride in your Corvette". Just too funny, but I do understand what you are saying...
Thread Starter
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From: Easton, PA
St. Jude Donor '10
David
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From: Easton, PA
St. Jude Donor '10
I showed you the operation of the differential when you were here yesterday and it fascinates me how it works. Maybe I will have to ask Trackdog or Gary Rimadi and see if they know. Anyway, has me fascinated to own a "rare" differential by quantity, but that nobody wants. Kind of like a Ford Pinto. LOL.
Thanks again for coming bye.
David