Looking for ratio numbers on a 55 chev pumpkin?

I have a couple of 55 chev rearends, I just took them apart, one has 58 guts and the other has 55,s. So there are numbers on the ring and pinion, do any of those tell me a ratio? Now I know its an old thread, and I did a search and can count the turns, I was just wanting a true number. The 58 turns three and not quite a half, more like a third, and the 55 turns three and a half. So I am guessin 3:35....and 3:55. A little help for the ignant! Thanks..

 

Just count the # of teeth on the ring gear and divide it by the # of teeth on the pinion........

 

So I got 11 and 37 on the ring, thats like 3.4 sooooo 3:40's sound right.

 

Kustchops,Stamped near the outer O.D. of the ring gear the side that bolts to carrier, will be some numbers like 9 37,this is the pinion teeth and ring teeth.I think all GM gears are marked like this,just divide 37 by 9 and walla 4.11.Same for what ever ratio gear set you have.
glider.

 

FROM THE OUTSIDE= IDENTIFICATION:
Anybody have the list of tag shapes[round tag on a thirdmember bolt on drivers side]....

the shape and or cuts off this round tags shape denotes the rear end ratios...

anyone have the real dirt on this TAG information?????

 

The 55 rear has a round tag, no marks or cuts or numbers. I havent figured it out yet.

 

count again i dont believe chev ever had a3.40 chances are its .3.08 3.36,3.55,3,70 4.11 4.56. 10/37=3.70

 

I've got a 1955 Pontiac rear end and it has stock 3.08's

 

Likely a 3.36:1