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Old 11-03-2010, 02:33 PM
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? to find gear ratio of rear end

ok im finding out that the rear end on my truck is not origanal. how do i find out what it is, and what should it be? gear ratio that is. 1997 f350 4x4.
thanks
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Old 11-03-2010, 02:52 PM
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jack up the rear end, have someone turn the wheel one full turn, make a mark on the driveshaft and count how many times it turns, it will get you close
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Old 11-03-2010, 02:52 PM
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Send a message via AIM to BIGBILL105 45
It may have a little tag on it that says the gear ratio on it..
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Old 11-03-2010, 02:54 PM
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What kanuck said
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Old 11-04-2010, 07:50 AM
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If you look on the door tag on the drivers door from ford, a white sticker probably on the door, but maybe in the door jam, you will see where it says axle code. Probably 2 digit letters, but maybe numbers.

Got to this website and find the ID number.

What is my Ford rear end ratio, do I have positraction - Drivetrain.com

Nice website for lots of info on axles.
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Old 11-04-2010, 12:26 PM
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if it is an after maket gear set. the ratio is stamped on the ring gear. if it is factory u can get the axle code off od it and call the dealer ship and they can tell u what was orginaly put in that axle.
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