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SRW to DRW Understanding

Discussion in 'Differential & Driveline' started by Shagydelic86, Jun 25, 2020.

  1. Shagydelic86

    Shagydelic86 Junior Member

    Posts:
    16
    Likes Received:
    3
    Joined:
    Oct 30, 2018
    Location:
    Olathe, KS
    First Name:
    Reece
    Truck Year:
    1984
    Truck Model:
    C30
    Engine Size:
    454
    Hello folks. For those that recall, I was here last summer asking for assistance identifying the truck I eventually bought. It is titled as a 1984 C20. After taking several pictures, talking with the seller, and several people on this forum we came to the agreement that from factory this is a C20 SRW, however, sometime in its early life it was converted to a DRW truck.

    With that being said. My question is in regards to SRW/DRW rear axle. Wear they the same? Different lengths? Are hubs the same and did all duallies come with a DRW adapter? This is what I'm working with below. I'm hoping to do Aloca wheels and use a 8 to 10 lug adapter, which would require me to add that to this. Adapter to adapter? Or is this standard for DRW trucks? Is there a totally different axle available?

    Thanks for all your help! Look forward to learning as much as I can throughout this build process.

    upload_2020-6-25_17-10-15.png
     
  2. Craig 85

    Craig 85 Full Access Member

    Posts:
    2,458
    Likes Received:
    1,809
    Joined:
    Jan 25, 2017
    Location:
    Grass Valley, CA
    First Name:
    Craig
    Truck Year:
    1985
    Truck Model:
    K30 SRW
    Engine Size:
    454/TH-400/NP205
  3. 86454k30

    86454k30 Supporting Member Supporting Member

    Posts:
    40
    Likes Received:
    67
    Joined:
    Oct 16, 2017
    Location:
    PNW
    First Name:
    Larry
    Truck Year:
    1981
    Truck Model:
    CHEVROLET
    Engine Size:
    350
    Your truck probably had an arrowcraft kit done on it.

    https://arrowcraftproducts.com/
     
  4. nvrenuf

    nvrenuf Full Access Member

    Posts:
    763
    Likes Received:
    276
    Joined:
    Jul 30, 2010
    Location:
    Mobile, Al.
    First Name:
    John
    Truck Year:
    1991
    Truck Model:
    K5
    Engine Size:
    454
    I agree, looks like Arrowcraft spacers.

    A square body dually pick up would have a 74” wide D70HD, a dually cab & chassis would have a 63” wide 14 bolt.

    SRW pick ups had a couple of axles available - an 80’s light duty 3/4 ton would have a semi floater 14 bolt. Heavy duty 3/4 tons and 1 tons use full floater 14 bolts with differences in shock and spring perch placement as well as different size brake packages. These would all be 69” wide.

    Do NOT use an adapter on an adaPeter, this is a recipe for failure.
     

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