HOW DO YOU DETERMIN THE GEAR RATIO OF A DIFFERENTIAL

  • Tiny
  • Joslee
  • 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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Wednesday, April 18th, 2012 AT 4:37 PM

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  • Tiny
  • Jacobandnickolas
  • Expert
  • 68,409 posts

There should be a tag on the differential itself.

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Wednesday, April 18th, 2012 AT 4:53 PM
  • Tiny
  • Chopper
  • Member

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.

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Tuesday, May 1st, 2012 AT 4:41 AM

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