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Ring and pinion question

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by verceingetorix, Apr 22, 2007.

  1. verceingetorix

    verceingetorix Registered Member

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    I might be getting a set of 1 ton chevy axles 60 front and a 70 rr out of a 87 chevy. Has a set of M-715 5.84 gears out of a jeep that I can have too. I was told the M-715 rear dana 70 had a .500 pinion offset housing. The chevy has a .625 pinion offset. Can the M-715 gears be used in the chevy axles with a spacer and what are your thoughts on using spacers. Also will I be able to use the carriers from the m-715 and will they work if I use the spider gears from the chevy axles. I would be using lockrights front and rear too.
    Any help would be great thanks. Bart
     
  2. 1977k5

    1977k5 3/4 ton status Vendor

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    Chevy didn't use a 70 rear in '87. Its either not a dana 70 or its not from a Chevy.

    An M-715 would have a 60 front and 70 rear, both with 5.87 gears. I don't like the idea of ring gear spacers but it sounds like that would allow you to use those gears.

    The carriers should interchange between dana 60's and 70's.
     
  3. verceingetorix

    verceingetorix Registered Member

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    It is a rear dana 70 will try and find the bom number to see what it is out of.
     
  4. Speedo

    Speedo 1/2 ton status Premium Member

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    Chevy used a 70HD in '87, it would be from a dually pickup or a SRW in a few C-30s. BOM for a dually axle should be a 605331-? the dash number would be dependent on ratio.

    Gus
     
  5. tarussell

    tarussell 1/2 ton status

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    GM most certainly did use a Dana 70 in 1987 like said up above .
    Makes sure that you are using the one piece carriers if you are using the L/R's the older stuff should be a two piece carrier on the D70 ( D60 never came open diff two piece carrier ) and the side gears mat not work in the one piece carrier.

    Tom
     

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