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Curious as to what gears?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by bodacious, Jan 21, 2006.

  1. bodacious

    bodacious 1/2 ton status

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    My 83 Blazer came from the factory with a 6.2 liter diesel, 700R4. I am wondering what axle gears came with this engine. I have not removed the inspection plates, yet. I thought someone on here could help, befor I went that far.:laugh:
     
  2. 1985_K5_Silverado

    1985_K5_Silverado 1/2 ton status

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    For '83, I'm not 100% positive. In '85, diesels came with a 3.08 standard axle ratio (gas models had a 2.73).
     
  3. dyeager535

    dyeager535 1 ton status Premium Member

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    Check the garage, was just posted what an '85(?) diesel would have had, and the name of the sight where the info was found.
     
  4. pauly383

    pauly383 Daddy383 Staff Member Moderator

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    Both my 83 frame's originally had 3.08's . Both were 305 trucks , but one was a sm465 , the other a 700r4 .

    If your real curious , get the numbers off the ring gear .

    I mean its an 83 , and the gear oil is seldom changed by previous owners , won't hurt to do it now :thumb:
     
  5. jekbrown

    jekbrown I am CK5 Premium Member GMOTM Winner Author

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    I dunno, but you need to swap in some 5.13s. :grin:

    j
     
  6. gmcjimmy4x4

    gmcjimmy4x4 1/2 ton status

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    new gearing

    :haha: Dont know what gears you might have now. But im running 5.13 in 91 jimmy and the rpms are just about the same as stock with 37's. I think 5.13's would be perfect in yours.
     
  7. Can Can

    Can Can Pusher Man Staff Member Super Moderator

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    Dollars to donuts it has either 3.42s or 3.73s.........
     

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