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Common gear ratio for 80's 3/4 ton diesel Chevy w/14bolt sf

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 88K5Jimmy, Feb 7, 2003.

  1. 88K5Jimmy

    88K5Jimmy 1/2 ton status

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    Common gear ratio for 80\'s 3/4 ton diesel Chevy w/14bolt sf

    I'm hoping 4.10's but what do you guys think?
     
  2. Zeus33rd

    Zeus33rd Smarter than you GMOTM Winner

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    Re: Common gear ratio for 80\'s 3/4 ton diesel Chevy w/14bolt sf

    I'm thinkin you'd most likely get 3.42's...Alot of diesels seem to have that ratio. /forums/images/graemlins/pimp1.gif
     
  3. BanksBurban

    BanksBurban Registered Member

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    Re: Common gear ratio for 80\'s 3/4 ton diesel Chevy w/14bolt sf

    Mine came with 4.10's
     
  4. Nikk

    Nikk Registered Member

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    Re: Common gear ratio for 80\'s 3/4 ton diesel Chevy w/14bolt sf

    Mine has 4:10's from the factory but its not a diesel
     
  5. noJeepshere

    noJeepshere I Drive Trains! Premium Member

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    Re: Common gear ratio for 80\'s 3/4 ton diesel Chevy w/14bolt sf

    3.42 is what alot came with because diesels run so slow (3000rpm redine) but for trailwork, 3.73s would be a good compromise. if yours is a trailerqueen, (as its probably not) or back roads to the trail, 4.10s would be best. i wouldn't go any lower unless you have big tires, then you should keep it higher than you would a gas rig.
     
  6. 83ZZ502_Jimmy

    83ZZ502_Jimmy 1/2 ton status

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    Re: Common gear ratio for 80\'s 3/4 ton diesel Chevy w/14bolt sf

    The one I got out of the diesel sub was 3.73

    John
     

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