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Old 08-24-2002, 06:43 PM
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Post Gear Ratio ID on 9" Ford Rearend

How so you identify the gear ratio without removing the carrier? Thanks!

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Old 08-24-2002, 07:34 PM
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Jack up the rearend so the tires will turn. Get ya some of that junk yard chalk and make a mark on the top of the tire and on the side of the driveshaft. Count how many times the driveshaft turns in one turn of the tire.

[ August 24, 2002: Message edited by: BigBlockBabe ]</p>
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Old 08-24-2002, 10:58 PM
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Usually there is a tag on the lower carrier bolt, clean it off and it should say something like 3.00 or 3L00. If it says 3L00 that means it is a posi carrier, take it no matter what ratio. They are getting hard to find.

When you jack it up with one tire on the ground to find out what it is and there is no tag. If you can't rotate it easily with the driveshaft disconnected or trans in neutral, it is a posi also. Worn posi's will drag not lock the tire.
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Old 08-25-2002, 04:19 AM
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You know I've tried the old turn the tire and count trick and it didn't work to well in the past. The only way to know for sure if the tag is missing would be to unbolt the axles and slide them out, then pull the third member (carrier) out. You have to count the number of teath on the ring gear and the pinion gear and divide. Ex. 37 teath ring gear / 10 teath pinion gear = 3.70 gearset. And chuck is right, any Ford 9-inch is worth having around. You can always change gears.

[ August 25, 2002: Message edited by: dmorris1200 ]</p>
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