[Mr70]

This may be the answer..
Not a Factory 4:56 COPO Posi gear,but not the Std. 4:56 Posi either.
I'm still curious to know what suffix code a 1969 COPO Camaro rearend with a Dealer installed 4:56 gear would show?

From COPO.com:

SPECIAL EATON POSI CASE "234" and RING & PINION



The 1969 COPO Camaros, Chevelles and the 1970 Copo Novas had a special heavy duty Eaton posi case, which differed significantly from the 4-series production case. The parts are listed below:

3916234 Complete assembly

3918834 Spring Plate - heat treated

3957939 Spring 75lb. each (natural color)

3880140 Spider Gear (larger size)

3918831 Side (Axle) gear (16 teeth)



RING & PINIONS

3916226-3916228 4.10:1 (1969 COPO Camaros and Chevelles - 1970 COPO 9010).

<u>3862514-3862516 4.56:1 (It is believed that these gears were shipped loose and installed at dealership).</u>