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Anyone running/heard good or bad about a 3.73X Gear?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Todd78/87, Jul 28, 2000.

  1. Todd78/87

    Todd78/87 1/2 ton status

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    Location:
    Haines, Ak
    I just had my 3.08's exchanged for 3.73's running 33's on my 78, 10 bolt front and 12 bolt rear... the dude (highly recommended place) told me that I could run a 3.73X gear in the rear without changing carriers. I asked if there were any advantages or disadvantages to the X gear over a regular,, he said no,, just the advantage of not having to but a new carrier. Any of you running them?

    Todd 78/87[​IMG]
    [​IMG]
    Alaska Bound
     
  2. Executioner

    Executioner 1/2 ton status

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    Location:
    Temp. Ft. Walton Beach Fl. home=Tucson, Az.
    Not exzactlially but I run 4.56:1 X gears on my rear 12 bolt, put them in around 86-87, no prolbems !
    Just make sure your carrier is in good shape(Magniflux it).
    good luck
     
  3. 89Jimmy

    89Jimmy 1/2 ton status

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    Location:
    Northern N.Y. east end of Lake Ontario
    I'm running 3.73's in a 12 bolt with 2.85 coyotes,(about 33.5" tall.) Tranny is 700r4. Cruises at 60mph about 1550 rpm. Day in-day out mileage is 15. (350 tbi)
    John

    So Much to do, So LITTLE cash.
     
  4. Blazer79

    Blazer79 1/2 ton status

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    Location:
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  5. Todd78/87

    Todd78/87 1/2 ton status

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    Not sure, to tell you the truth,, I wish I could have seen the X and the normal one side by side,,, all I know is that the X gear will fit in the carrier I had and a normal one wouldn't.

    Anyone??????????

    Todd 78/87[​IMG]
    [​IMG]
    Alaska Bound
     
  6. stephan van leir

    stephan van leir 1/2 ton status

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    Location:
    central Colorado
    The X means that the gears have been machined so that a new carrier is not needed. This info comes from National Drivetrain.
     

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