How to Determine the rear axle Ratio

[Fang S-289]

TEST TEST

Can anyone advise me as to how I can determine my rear axel ratio?

Thanks in advance for any assistance you can render!

 

[JohnZ]

Mark the rear tires and the prop shaft, turn the rear wheels one full revolution, and count the prop shaft revolutions to determine the ratio. 3-1/2 turns is a 3.55, 3-3/4 is a 3.70, etc.

 

[Fang S-289]

Many Thanks John!!

 

[twiget]

Assuming your cars have the stock rearends, you could always check out our Model Center.

Jason

 

[CQRT]

John: there was an excellent thread a couple months ago when we posed the same question for our 74 coupe-- at 2500rpm and 60 mph-- we figured we were swinging a 3.08 rear which was standard on the L-48 automatics of the period - -
cqrt in AZ