- How do you determin the gear ratio of a differential

2002 SUBARU IMPREZA
150,000 MILES
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JOSLEE
  • MEMBER
  • 1 POST
I want to change the differential, but it must have the same gear ratio as the other one.
Apr 18, 2012 at 9:37 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,246 POSTS
There should be a tag on the differential itself.
Apr 18, 2012 at 9:53 AM
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CHOPPER
  • MEMBER
  • 16 POSTS
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.
Apr 30, 2012 at 9:41 PM
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