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Trying to find gear ratio on 70XR7, Cleveland 4V with an FMX trans.
Multiple axle ratios were available from the factory.
You need to either check the tag on the driver's door tag under axle.
Get a Marti report www.martiauto.com
Check the axle tag which should be on the driver's side of the axle.
Have the rear of the car off of the ground and count the tire rotations while turning the driveshaft.
 

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Tag on the axle is the best way. Just take a wire brush, flashlight and some Simple Green with you when you crawl under there.
 

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This ....Have the rear of the car off of the ground and count the tire rotations while turning the driveshaft. ( how many turns the driveshaft goes for 1 full tire rotation)
 
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