Rear Brakes; Master Cylinder; Starter; Driveshaft - Factory Five Racing MK4 ROADSTER Assembly 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
") to work the best. From 1996 to 2004 Mustangs used a brake boosting
Cobra™ master cylinder ( /
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system called a hydro-boost system. This system utilized pressurized power steering fluid to assist in
pedal pressure. This unit works with FFR kits with an adaptor bracket which comes standard with FFR
96-04 EFI kits (More brake component information can be found in the High Performance Braking
Systems section of this Manual).

Starter

From 1979 to 1991 the V8 starters used were all the same one wire starters. In 1992 Ford switched to a
lighter, more powerful starter which had a built in solenoid, but required a second external solenoid for
wiring and they continue to use this starter.

Driveshaft

Driveshafts were unpainted steel with a 28 spline yoke from 1979 to 1993. This 28 spline fits into the
T-5 and Tremec 3550. In 1994 Ford used a 31 spline yoke, which was used through 2004. This 31
spline fits the T-45, the Tremec TKO, and the Tremec 3650. The Tremec T-56 used in the 2003-2004
Cobra™ Mustang, and the 2000 Cobra™ R Mustang has a 27 spline yoke.

Clutch Cable, Quadrant

Clutch cables and quadrants remain the same from 1982 to 1995. From 1996 to 2002 cables and
quadrants changed.
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