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Old 12-29-2005, 09:43 AM
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10 Bolt Rear End

I'VE GOT A 1968 FIREBIRD WITH A 10 BOLT REAR END IN IT AND I'M TRYING TO FIND OUT WHAT EXACTLY IT IS, AS FAR AS RATIOS, IS IT POSI OR NOT, IS IT THE ORIGINAL REAR END OR IS IT OUT OF SOMETHING ELSE. ETC...
THE DIFFERENTIAL HAS ON EACH SIDE 2 PARALLEL RIBS(ONE BLEOW AND ONE ABOVE THE AXLE TUBES. I FOUND THE STAMPING ON THE FRONT FACING PASSENGER SIDE AXLE TUBE IT READS "GZ G049 1"

I ALSO FOUND RAISED OR CAST NUMBERS ON THE REAR FACING LOWER FLANGE OF THE DIFFERENTIAL THEY WERE HARDER TO READ BUT I THINK THEY ARE "67810" NOTE: THE 6 MAY BE AN "8", AND THE ONE MAY BE A "7"

I'VE TRIED TO FIND AXLE ID CODES FOR BOTH CAMAROAND FIREBIRD, AND EVEN GM, BUT CANNOT FIND A CHART THAT HAS "GZ" CODES ON IT

ANY INFO YOU GUYS CAN GIVE WOULD BE GREATLY APPRECIATED.

THANKS

DAVE

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Old 12-29-2005, 12:02 PM
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10 Bolt rear end decoding

I think I've got it figured out...

Anyone correct me if I'm Wrong Please..

GZ G049 1 is decoded as:

GZ= 2.73:1
G= Detroit Gear and Axle Plant
049= 49th day of the year (February 18th)
1= Day Shift.

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