Mechanics

- HOW DO YOU DETERMIN THE GEAR RATIO OF A DIFFERENTIAL

2002 Subaru Impreza • 150,000 miles

I want to change the differential, but it must have the same gear ratio as the other one.
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Joslee
April 18, 2012.



There should be a tag on the differential itself.

Count ring gear teeth and pinion gear teeth divide = gear ratio. Or just call dealer with vin number and they can tell you what came stock.

Tiny
Chopper
May 1, 2012.