79 rear end question

Discussion in 'Suspension/Chassis' started by Motormouth759, Jan 24, 2011.

  1. Motormouth759

    Motormouth759 Member

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    OKay tonight I was under my truck lowering it and noticed this leak of brake fluid, Well its coming from a valve but Ita got a hard line in and a soft out. Its got a bar that atached to the rear that moves with it... Is this a rear brake proportioning valve or what? I can get a picture of needed
     
  2. jackash002

    jackash002 Enthusiast

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    Location:
    NE FL
    Truck:
    1982 2wd p/u, 1983 toyota trailblazer, 1982 toyota truggy (next, just a cab/frame now)
    correct, that would be the LSPV, load sensing proportioning valve.. as your bed is filled with heave load and lowered in the rear,the body gets closer to the axle(the bar moves up)and it increases rear braking by opening the valve. on my 4x4 i originally cut the bar and tied to body to increas braking, and then bypased it later. (36-39.5" tires)

    in my 2wd a previous owner had already done that, then one day i slammed on my brakes in traffic and it locked up the rear end super easy with my empty bed and kinda turned out a little bit.. good thing no rain, straight line, dry-ish hot florida day.. if it's the valve itself leaking they have universal ones on summit, china, etc.. or bypass that beast.. too much rear braking is better than soft leaking brakes imo.. when i put my 240 rear end in i will see about replacing the lspv if needed, haven't tried any universal ones to see what works.

    -Ben
     
  3. Motormouth759

    Motormouth759 Member

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    Great thanks for the info, I just wanted to make sure wfor hat it was and im going to leave it hooked up now.
     

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