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Ordering Caliper 2.5 or 3.5

Discussion in 'Suspension, Steering & Brakes' started by lothar863, Jun 18, 2019.

  1. lothar863

    lothar863 Full Access Member

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    Location:
    Nashville TN
    First Name:
    Colton
    Truck Year:
    1989
    Truck Model:
    r3500
    Engine Size:
    7.4 FI
    I tried searching but it kept giving me an error so sorry if this has been asked and answered before.

    I just got to work and was going to order some front calipers, rubber hoses, and pads.

    Went to rock auto and i am seeing options for 13" x 3.5" and 13" x 2.5"

    I dont have the truck with me(no brakes) and would really like to get them ordered right now.
    I also don't have a shot of the glove box sticker with me.
    Is there any way to tell which i need?

    1989 r3500 crew cab dually 7.4 FI

    FYI i was looking between these 2
    CARDONE 18P4167
    or
    ACDELCO 18FR650
     
  2. Craig 85

    Craig 85 Full Access Member

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    454/TH-400/NP205
    1 Tons have 13x3.5" rear brake shoes. I bought the Cardones from Rockauto too.

    IMG_1277.JPG
     
  3. bucket

    bucket Super Moderator Staff Member

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    ThermoQuiet pads?
     
  4. SquareRoot

    SquareRoot Full Access Member

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    Never seen a rear axle with lockout hubs before. Novel!
     
  5. Craig 85

    Craig 85 Full Access Member

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    454/TH-400/NP205
    That's a picture of the front axle. The front calipers are different depending on which rear brakes you have on a 14 bolt.

    I've seen lock out hubs on rear axles in the magazines years ago. That way you can flat tow them and not use a trailer. Warn actually made a kit for the Dana 60 for a while. They don't sell them any more. From reading later articles, it was a weak set up due to them using cast aluminum hubs.

    http://www.fourwheeler.com/how-to/transmission-drivetrain/154-0910-early-dana-44-full-floater-
    axle-kit/

    http://www.tricountygear.com/2012/11/02/warns-rear-full-floating-dana-60-kit/
     
    bucket likes this.

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