Brakes Brake Fluid Question

Discussion in 'SN95 4.6L Mustang Tech' started by Bob Hughes, Dec 19, 2012.

  1. Bob Hughes

    Bob Hughes Member

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    I'm going to be installing an SLP line lock tonight, and while I'm at it going to have the change out a majority of the fluid in the brake system. Should I upgrade from dot3 to 4 or 5...are there any benefits to it? Have to pick up fluid this afternoon just curious what others have done.
     
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  2. bdcardinal

    bdcardinal tree hugger

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    Do not use DOT 5, it is silicone based and does not play well with DOT 3, 4v or 5.1. Dot 4 and 5.1 will mix with DOT 3, but generally is thicker. You can pick up DOT 4LV from a Mercedes dealer that will have the higher boiling point characteristics of a DOT 4, but with the lower viscosity of a DOT 3 which plays better with ABS systems. That being said the Motorcraft DOT 3, p/n PM1C has a dry boiling point of 500F, and is very reasonably priced. I sell a bunch to road racers.
     
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  3. Kilgore Trout

    Kilgore Trout Fried or Broiled ?

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    Two bottles of motorcraft dot 3.
     
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  4. flstang65

    flstang65 Well-Known Member

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    I have that kit (you will love it) and I used what ever the recommended fluid is. Don't forget to bleed that master cyl.
     
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  5. Bob Hughes

    Bob Hughes Member

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    Thanks guys for the input. I'll pick up the ford dot 3 tomorrow
     
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  6. flstang65

    flstang65 Well-Known Member

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    Get a new shifter knob with the button on the side for the line loc. Makes things soooo much easier.
     
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  7. Bob Hughes

    Bob Hughes Member

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    That's on my list. I am planning on putting an "arming" switch somewhere out of the way to power switch on knob....that way it doesn't "accidentally" get used on the street.
     
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