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10 Bolt Gears

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by johnny reb, Jan 22, 2001.

  1. johnny reb

    johnny reb 1/2 ton status

    Mar 6, 2000
    Likes Received:
    Pittsburgh, PA
    I just put 33's on my 86 K5. I want to change the gears to either 4.11 or 4.56. I have the stock NP208, 700R4, and 10 bolt rearend. Will 4.11 and 4.56 gears work with a 10-bolt? I'm not sure what gears I have for the front, but will I have to change those as well?
  2. HarryH3

    HarryH3 1 ton status Author

    May 31, 2000
    Likes Received:
    Georgetown, TX
    You can buy those gear ratios for a 10-bolt diff. The bad news is that yes, you will have to change the gears in both the front and rear axles if you want to be able to use your 4WD. [​IMG]

    There's a gear and differential application chart at <A target="_blank" HREF=http://www.reiderracing.com/ap_chart.htm>http://www.reiderracing.com/ap_chart.htm</A>

    <font color=black>HarryH3 - '75 K5</font color=black>
    <A target="_blank" HREF=http://ThunderTruck.ColoradoK5.com>http://ThunderTruck.ColoradoK5.com</A>

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