I have a ring and pinion with these gm #ring gm3862525 11 41 6 69.the pinion 38625 13 11 41 2 70 it was said these came from the same car 69 camaro.

Carhodge, the first two numbers on each gear: 11 and 41, tell you it's a 3.73 geared set. 41 divided by 11 = 3.7272727272 or 3.73:1.
I'm guessing that the 6 69 and 2 70 are date codes. Doesn't look matched to me, but I'm guessing they came from two different cars.
Anyone?

According to my info these are matched but weather they are the same match that original came together, the dates don't seem to collaborate

http://www.synthetic-oil.com/images/4113a.jpg

Thanks guys,they were free and looks like a good pattern on them.I have a question?Are 3:55 still available new?

Richmond Gear still makes them for 8.2" rearends.... so does Motive Gear, among others.

http://www.richmondgear.com/01gm.html
http://www.motivegear.com/pages/differential.html