Hot Rods camaro rear end ratios

i have a early '70's camaro rear end in my willys......i thought it is a 3:55, but i don't see any ring and pinion sets at 3:55 available....it is the 8.5 inch standard chevy rear end.......looks like they jump 3:42 to 3:73 .....am i right about this.......thanks charlie........

 

Why not just pull the rear cover ... count the teeth and then

Know the RATIO ...

 

im with deuce.

 

2.73,3.08,3.23,3.42,3.73,3.90,4.11 and so on.

 

So....... You're wanting to replace your ring and pinion with what you think is already in there? Why? Got a problem back there? If so, you just might want to pull the cover and have a look-see anyhow. Shouldn't be hard to count the teeth while your in there.

My .02

 

The ratio is stamped into the ring gear,at least on GM gears.

 

Not sure what came factory but my buddy is running 3.55's in his 69 camaro. Although it is a 12 bolt.

 

3.42's were VERY common in '71-up Camaro's and Firebirds.

 

I bet 3.08.......


Jack up 1 wheel, mark it and the driveshaft. Turn the driveshaft until the wheel has turned 2 revs. The number of turns of the shaft equals the axle ratio.