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Trans case drain plug and fill plug size- 90 Suburban K1500

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Foy, Jun 23, 2003.

  1. Foy

    Foy Registered Member

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    Location:
    Raleigh, NC
    Gents-
    Can somebody tell me the correct size for the trans case drain and the fill plug on a '90 Suburban K1500 w/ NP 241 trans case? It's bigger than 1 1/8" and smaller than 1 1/4", but it could be metric, too. I'd like to know rather than drive the truck to the parts store because I believe the trans case may be low on ATF lube.

    Thanks for any responses,
    Foy
     
  2. imiceman44

    imiceman44 1 ton status

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    It's definitely metric.
    If it's in between 1 1/8" and 1 1/4" then I would say it's 30mm but if someone actually has it they can measure it for you.
    /forums/images/graemlins/thumb.gif
     
  3. Thunder

    Thunder 3/4 ton status

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    I just use a metric Cresent wrench on mine it fits perfict /forums/images/graemlins/grin.gif
     

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