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1983.5
T-5
2.95
1984
T-5
2.95
1985-89 T-5
3.35
1989-93 T-5
3.35
1994-95 T-5
3.35
1995
TR-3550
3.27
1996-98 T-45
3.37
1999-02 TR-3650
3.38
2003-04 T-56
2.97
Rear Axle Ratio
Front brakes
1987 to 1993 front rotors are 11" diameter, and use a 4.25" 4-lug bolt pattern. They use a cast iron single
piston caliper. These rotors also contain the hub that carries the wheel bearings cast in as a one piece
rotor/hub assembly (1982 Lincoln Continental rotors are an exact rotor/hub assembly except they have a
4.5" 5-lug bolt pattern). In 1994 the Mustang had a separate hub and rotor, and had a 4.5" 5-bolt lug
pattern. The rotor stayed 11inches in diameter, but a new style caliper was added. All Cobra and the
1995 Cobra R versions of the Mustang from 1993 to 2004 used 13 inch front rotors with PBR 2 piston
calipers. The 2000 Cobra R used Brembo 4 piston calipers and rotors. In all cases the flexible brake lines
with mounting brackets and banjo bolts are required from the donor. (More brake component information
can be found in the High Performance Braking Systems section of this Manual)
Rear Brakes
1987 to1993 Mustangs used a 4.25" 4-lug bolt pattern drum brake. From 1994 to 2004 Mustangs
switched to have a 10.5"diameter 4.5" 5-lug bolt pattern solid rear rotor with a single piston cast iron
caliper. All Cobra and the Cobra R versions of the Mustang from 1993 had an 11.65" rear vented rotors
with the same calipers that the 10.5" rotors used, however the caliper slider brackets were slightly
different. Because the 10.5" rotors were solid and the 11.65" rotors were vented, the caliper slider
bracket is manufactured with a slightly wider opening for the rotor. All flexible brakes lines and there
mounting brackets are required donor parts for FFR kits. Emergency brake cables will clip right into a
Factory Five kit. (More brake component information can be found in the High Performance Braking
Systems section of this Manual)
Master cylinder
1987 to 1993 Mustangs use a single master cylinder with two different piston sizes, one for the front and
one for the back, which works well with the stock brakes. Vacuum boosters are not used on FFR kits due
to interference with the chassis. For most disc brake applications we have found the 1994 Mustang Cobra
master cylinder (
/
") to work the best. From 1996 to 2004 Mustangs used a brake boosting system
15
16
1.94
1.34
1.00
0.725
1.94
1.34
1.00
0.625
1.93
1.29
1.00
0.675
1.99
1.33
1.00
0.675
1.99
1.33
1.00
0.675
1.98
1.34
1.00
0.680
1.99
1.33
1.00
0.670
2.00
1.32
1.00
0.620
2.07
1.43
1.00
0.800
Manual
2004
2003
1996-2002
1995
1994
1987-1993
www.factoryfive.com
N/A
2.76
265
N/A
2.76
265
N/A
3.15
265
N/A
3.15
300
N/A
3.15
300
N/A
3.00
350
N/A
3.22
325
N/A
3.38
360
0.62
3.28
450
Optional
Automatic
3.55
2.49
3.55
3.27
3.27
3.27
3.08
3.27
3.08
3.27
2.73
3.08
3.27
271
508-291-3443
E3ZR-7003-A
E4ZR-7003-DA
E(5,6)ZR-7003-(FA,FB)
F(Z,9,0)ZR-7003-(A,AA)
75
75
75
75
75
100
109
120
129
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