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lowest 12 bolt gears

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 84k5, Oct 22, 2000.

  1. 84k5

    84k5 1/2 ton status

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    Anybody know what the lowest gears available from the factory in a 12 bolt were? Thanks.

    Brian
    84k5, 4"Skyjacker lift,33x12.5 Goodyear MT/R, 15x10 Bajas
     
  2. FWP

    FWP CRS

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    3.73, I think. Maybe 4.10? Why do you ask?

    <font color=blue>Maverick</font color=blue> <font color=red>CH 4 or 35</font color=red>
     
  3. 84k5

    84k5 1/2 ton status

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    I ask because if they make 12 bolts w/ 4.10 I might as well try and find one, rather than spend $500 to change the gears in my 10 bolt.

    Brian
    84k5, 4"Skyjacker lift,33x12.5 Goodyear MT/R, 15x10 Bajas
     
  4. FWP

    FWP CRS

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    Gotcha. I have 2 original 12 bolts, one with 3.08, that I put 4.10 in and a 3.73, which I'm gonna drive with to see if it works for me, once I get some more 35's for the blazer.

    <font color=blue>Maverick</font color=blue> <font color=red>CH 4 or 35</font color=red>
     
  5. Goose

    Goose 1/2 ton status

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    According to my Chilton's Blazer manual: Ratios available were 2.76,3.07,3.4,3.73, and 4.11 to 1. Also the 4.11 rear axle ratio is mated to a 4.09 front axle ratio.
    That was from GM, I've seen adds in 4x4 mags for 12bolt ratios of 4.56
    Cruisin in my '73.
     
  6. FWP

    FWP CRS

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    4.11 and 4.09, that's what Ford did!

    <font color=blue>Maverick</font color=blue> <font color=red>CH 4 or 35</font color=red>
     

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