Suzi 5/15/2010

1986 Chevrolet K5 Blazer Silverado 8Cyl5.7L - Transmissions & Drivetrains

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I need to find out what the rear differential gear ratio is for my Blazer I know it has a 10 bolt cover

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  fast eddie28 5/15/2010

  look on the passenger side top of the axle housing about 4 inches from the differental housing you will find some numbers and letters stamped in the set of three letters stamped first are the codes to tell you what ratio if you cant find on internet the break down call most any auto recycler and they can break code for you ,also easier if still there is a print out sheet in glove box with all codes to your vehicle that a dealership can tell you and thats if its orignal then only way is pull diff housing cover and get the ring and pinion gears numbers and you will know for sure.

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  HouseCallAuto 5/15/2010

  fast eddie covered all the bases. I agree

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