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A different rear disc brake question...

Discussion in 'The Garage' started by nvrenuf, Nov 5, 2002.

  1. nvrenuf

    nvrenuf NONE shall pass! Premium Member

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    Has anyone put rear disc brakes on a truck with a factory load sensing proportioning valve? I'm thinking about maybe going to rear disc on my 91 but I'm curious as to how the brakes will act (I want to keep the valve).
     
  2. JK5

    JK5 1/2 ton status GMOTM Winner

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    I have the factory proportioning valve.......
    I happy with it, because the rear brakes grab first......it helps with the way my truck handles on the street with crossover steering......

    I put about 4000 miles on the truck.....I didn't notice any abnormal brake wear /forums/images/graemlins/thumb.gif
     
  3. HarryH3

    HarryH3 1 ton status Author

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    There's a difference between the proportioning valve that's attached to the frame rail just in front of the engine and the one he's asking about. Some trucks came with another valve that attached to the rear axle. It would limit pressure to the rear brakes, depending on how heavily loaded the rear was. It had a link that attached between the frame and the axle. The pressure was adjusted based on the distance between the two. /forums/images/graemlins/cool.gif
     
  4. JK5

    JK5 1/2 ton status GMOTM Winner

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    Ah....these 70's trucks don't have all those gizmos??? That's new to me......
     
  5. nvrenuf

    nvrenuf NONE shall pass! Premium Member

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    The valve came on 1 ton SRW's & DRW's, I'm not sure about 3/4 ton trucks. I know the valve was used in the 70's and 80's but I don't know what year it was introduced.
     
  6. nvrenuf

    nvrenuf NONE shall pass! Premium Member

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    Nobody...? I might have to do this just so I can be the first one!
     

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