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Thread: Brake system specifications

  1. #1
    I'm an air-conditioned gypsy gadget73's Avatar
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    Default Brake system specifications

    I've been collecting brake system information for my own research purposes, and I figured I'd share them here. This is a closed post, but if you have information that you feel belongs here, please post it in a new thread, and it will be merged in if appropriate. I would like to limit information to known reliable sources, preferably factory shop manuals, but manufacturer specs from reliable sources are also good.


    First post, the box brake system. All scans are from the 1986 Body Chassis Electrical manual for Crown VIc, Grand Marq and Towncar. Included are disc brake specs, drum brake specs, information about the valving present in the system, and the proportioning information for the frame mounted valve.
    Attached Thumbnails Attached Thumbnails 1986_brake_specs.jpg   1986_brake_valve_info.jpg   1986_drum_brake.jpg   1986_front_disc_brake.jpg  
    Last edited by gadget73; 02-06-2010 at 06:28 PM.

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  2. #2
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    1990s master cylinder and proportioning valve data along with a picture of a 90s master cylinder with the prop valve threaded in. Also, a disassembled 1970s Ford truck combination valve. This is not identical to what exists on the Panther up to 1995, but the basic design is very similar. It is included here for references. The parts marked are as follows:

    A- Proportioning Valve: Reduces fluid pressure to rear brakes
    B- Metering Valve: Holds off pressure to front discs until slower rear drums can react
    C- Bleeder Rod: Must be pulled out when bleeding factory brakes (panther ones push in)
    D- Brake Light Warning Switch
    E- Pressure Differential Valve: Senses pressure imbalance
    Attached Thumbnails Attached Thumbnails 92-94 Master Cylinder Specs.jpg   95-97 Master Cylinder Specs.jpg   combo_valve.jpg   90s_mc.jpg  
    Last edited by gadget73; 02-06-2010 at 06:08 PM.

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  3. #3
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    Brake booster data, pics attached. Data courtesy 2vmodular from p71interceptor.com :

    1979-1987 crownvic
    Part Number 54-74200
    Diaphragm Type Single Diaphragm
    Diaphram Diameter 11 1/2


    1988-1991 crownvic except police
    Part Number Cardone 54-74214
    Diaphragm Type Single Diaphragm
    Diaphram Diameter 11 1/2

    1988-1991 crownvic with police and station wagon
    Part Number 54-74213
    Diaphragm Type Single Diaphragm
    Diaphram Diameter 11 1/2

    1995-2000 booster
    Part Number Cardone 54-73197
    Diaphragm Type Dual Diaphragm
    Diaphram Diameter 8 3/4
    Attached Thumbnails Attached Thumbnails 7987_booster.jpg   8891_civi_booster.jpg   8891_police_wagon_booster.jpg   9500_booster.jpg  
    Last edited by gadget73; 02-06-2010 at 05:56 PM.

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  4. #4
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    Front rotor data, 1995-97 and 98-02 Info courtesy 2vmodular of p71interceptor.com

    also included for comparison's sake, the box front rotor data. 92-94 front rotors should be the same diameter, but they use a seperate hub bearing assembly instead of the integral hub that boxes use. No repacking of bearings on 92+ models.
    Attached Thumbnails Attached Thumbnails 9597_front_rotor.jpg   9802_front_rotor.jpg   1986_front_disc_brake.jpg  

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  5. #5
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    1994 rear caliper data, rockauto crosses this 1992-1995

    Bore Size=1.885" Inlet Thread=M10X1.5 Bleeder Thread=3/8X24

    1996 rear caliper data, crosses 1995-2002

    Bore Size=1.88" Inlet Thread=M10X1.5 Bleeder Thread=3/8X24

    1994 front caliper data, crosses 1990-1994

    Bore Size=2.875" Inlet Thread=M10X1.5 Bleeder Thread=3/8X24

    1996 front caliper data, crosses 1995-1997

    Bore Size=2.6" Inlet Thread=M10X1.5 Bleeder Thread=3/8X24

    1998 front caliper data, crosses 1998-2002. Note this is a dual piston caliper

    Bore Size=1.884" Inlet Thread=M10X1.5 Bleeder Thread=3/8X24


    attached are pics of dissasembled 98-02 style front and rear calipers. Pics courtesy p71interceptor.com
    Attached Thumbnails Attached Thumbnails 9802_ calipers.jpg  

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  6. #6
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    rear rotor data

    1998 rear rotors, crosses 96-02

    Outside Diameter 11.215

    1995 rear rotor, crosses 91-95

    Outside Diameter 11.415

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

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