Calculate rear end ratio

Do I remember from somewhere that cars in places like Texas tended to have the taller axle ratios because of the long distances people tended to travel and the generally flatter terrain?

Did I just dream this??

Oh yeah, even if you can read the numbers on the case, there is a small chance someone may have swapped parts years ago. For the effort it takes, it's still got to be worth trying the manual method. Besides it's quite fun.

Mart.
 
Mart said:
Do I remember from somewhere that cars in places like Texas tended to have the taller axle ratios because of the long distances people tended to travel and the generally flatter terrain?

Did I just dream this??

Oh yeah, even if you can read the numbers on the case, there is a small chance someone may have swapped parts years ago. For the effort it takes, it's still got to be worth trying the manual method. Besides it's quite fun.

Mart.
Click to expand...

The car came from New Hampshire.
 
I have a question. is the ring gear attached directly to one side of the rear axle?
If that's the case then the process of turning a wheel for the ratio would have to be done by turning the wheel mounted to the ring gear side so that there is no loss of rotation back to the drive shaft. Right?
The initial ratio of 1.9 shaft rotations to 1 wheel rotations posted here doesn't sound right to me but I'm new to all this. Am I correct in thinking this test can only be preformed accurately from one side of the rear axle?
The video linked in one of the above responses shows the same thing. He turns the hub one complete turn and the shaft turns less than two times.
isn't that the ratio? why turn the hub another full rotation?
http://www.youtube.com/watch?v=i_Enyf67KTs
If you look at this video this guy turns 10 times for accuracy but never does any math it's simply the rotation of the wheel once to the number of rotations of the drive shaft.
 
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Bug, the ring gear is not fixed to one shaft. The ring gear is attached to the central carrier and drives the diff pinions via the cross pin. The pinions then drive the axle shafts. Any difference between the two shafts is taken up by rotation of the pinions.

This may help, and may be of interest to all:

http://youtu.be/67XoCMTcN7M

Mart.
 
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