determining gears

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Aug 25, 2006 | 03:46 AM

Sean W.

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4th Gear Member

Joined: Aug 2006

Posts: 1,116

From:

determining gears

hey fellas,

how can i find out what the gear ratio is on my 1968 stang?

Aug 25, 2006 | 04:16 AM

Soaring

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Joined: Oct 2004

Posts: 17,565

From:

RE: determining gears

See if this helps.
http://science.howstuffworks.com/gear-ratio2.htm

Aug 25, 2006 | 06:30 AM

Sean W.

Thread Starter

4th Gear Member

Joined: Aug 2006

Posts: 1,116

From:

RE: determining gears

thanks for sharing, but it did not answer my question really... how to i find out what gear ratio my car is?

Aug 25, 2006 | 02:06 PM

Soaring

I ♥ Acer

Joined: Oct 2004

Posts: 17,565

From:

RE: determining gears

First of all, the rear end information is in your VIN, secondly, you should have a metal tag on your rear end with numbers on it, and thirdly, if you dont have either of those jack up the car, mark a line on the rear tire it does not matter which side, then make a mark on the driveshaft, rotate the tire one full turn while counting how many times the driveshaft goes around. Yours will probably turn about 3 times, making your rear either a 2.80 or 3.0.

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Aug 26, 2006 | 12:53 PM

stang6790

Joined: Jun 2006

Posts: 22

RE: determining gears

This will work if you have a posi rearend but if it is not a posi you need to jack up only one wheel leaving the other on the ground (you could also jack up both wheels and have someone hold one of them) then follow the same procedure except when you get the number of rotations of the driveshaft you then multiply by 2.

Quote:

ORIGINAL: Soaring

First of all, the rear end information is in your VIN, secondly, you should have a metal tag on your rear end with numbers on it, and thirdly, if you dont have either of those jack up the car, mark a line on the rear tire it does not matter which side, then make a mark on the driveshaft, rotate the tire one full turn while counting how many times the driveshaft goes around. Yours will probably turn about 3 times, making your rear either a 2.80 or 3.0.

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