Sold original GM 12 bolt gears 3.31 dated 1977

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**AnthonyS** · #1 08-04-2020, 05:41 AM

SOLD

Hi Everyone, I have some take out GM original gears

They are original 3.73 gears as shown with no fatal issues; they've been bouncing around the shop for a while - always thought I'd use them.

11-41

seem to be dated JAN 1977 - I believe them to be out of a truck.

ring part number not fully readable - almost looks like it was stamped before machining... but could be 3817778 if you use your imagination.

339624 pinion - other part cross numbers I believe are 6260542 & 6260541 or 3884935

Very usable as shown, please see photos. Swapped for a 4.56 set.

Nothing beats GM gears. Even though these are dated January 1977 - they are real GM truck housing gears!

shipped to the 48.

Thanks sYc, be safe & well friends!
Anthony

**AnthonyS** · #2 08-04-2020, 05:43 AM

more photos for a complete picture

**big gear head** · #3 08-04-2020, 10:59 AM

Those are truck gears. 41/11 = 3.73. They only fit the truck housing.

**AnthonyS** · #4 08-04-2020, 10:35 PM

Thank you.

Yep - the text of ad is correct, I copied and pasted the title from my other gear listing and changed the date but forgot to change the ratio in the title - ad shows 3.73.

Here's that ad for the 1969 dated 3.31 ring & pinion: https://www.yenko.net/forum/showthread.php?t=162452

Anyway, these truck gears are listed on eBay now: https://www.ebay.com/itm/143673981517

Thanks again sYc Friends!
Anthony

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