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are all 700R4s overdrive

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Ditchdigger, Mar 11, 2001.

  1. Ditchdigger

    Ditchdigger Registered Member

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    Location:
    The Great Midwest
    I have an 84 K-5 with a 305ci Q-jet
    and wandering if all 700R4s have OD
    and I am also wandering what rear end gears I
    have, it has 10 bolt diffs front and rear

    If it ain't intimidating / It ain't a Chevy!
     
  2. BlazerGuy

    BlazerGuy 3/4 ton status

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    Yes all 700's are overdrive. Look inside your glove compartment and look at the codes in there, it should tell what gears you have but I dont know what the individual codes mean(I'm sure someone else does), there also may be a sticker on the inner fender that tells you. Or you could pull the cover and use this formula:
    Ring Gear Teeth Count / Pinion Gear Teeth = Gear Ratio


    Murphy's Laws on Life :
    "Opportunity always knocks at the least opportune time." [​IMG]
     
  3. Itali83

    Itali83 1/2 ton status

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    The codes for rear gears in the glove box are as follows. GU2 = 2.73 GU4 = 3.08 GU6 = 3.42 GT4 = 3.73 GT5 or GT8 = 4.10 and G80 = gov. lock I just did this because I wanted to know what my rear gears were.
    Ben 87 Jimmy
    "if it ain't got rust, it ain't got character."
     
  4. Chewy

    Chewy 1/2 ton status

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    You could also check out the specifications page for info.

    [​IMG]
    '87 Beast
    Colorado, USA
     

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