1992 and later crown victorias have a Drum-In-Hat (DIH) emergency brake
setup. Conventional hydraulic braking is accomplished by the brake
caliper clamping the brake rotor between two brake pads. To the
surpise of many crownvic owners, the emergency brake setup is actuated
by expanding a set of minature brake shoes against the inside of the
brake rotor hat.
Here is the driver's side rear of a 1997 crown victoria police
interceptor with the rear wheel and brake rotor removed. The brake
caliper has been loosely reinstalled on it's floating mechanism.
These shoes show some wear. But there's no evidence of the brake lining
material breaking into little tiny peices from being rust-jacked off
the metal like some new england crownvic owners have expierenced.
Here is the passenger's side rear of the car with the wheel and brake
rotor removed. The brake caliper has been loosely reinstalled on it's
If you're observant, you'll notice that the brake caliper on the
passenger's side of the car is located towards the front of the axle.
But on the driver's side, the caliper is located to the rear of the
axle. This is because the same e-brake backing plate mechanism is used
on the driver's side as on the passenger's side. Just rotate the
backing plate over 180 degrees, and you can swap the mechanism side to
The rear axle seal has a small leak on this side. But it's not leaking
significantly enough at this point in time to cause problems with our
And with the caliper removed
A while back, a mechanic had replaced the portion of metal brake tubing
that runs from the front of the driver's door to the rear wheel well
because it had rotted through and was leaking fluid. This
spliced-in-tubing worked good for a while. But it was a little too long
and not routed quite like the oem ford installed tubing, so it rubbed
against things as the car was driven. When these pictures were taken,
the splice junction in the rear had just sprung a large leak causing
the hydraulic brakes to become inoperative. The e-brake was in need of
adjustment and wasn't holding very good at the time. Luckily, the
parking brake inside the transmission could still hold the car
Here's the old "warped" brake rotors that vibrated badly when the
brakes were applied.
These sat outside overnight during a humid summer night and have a
little surface rust on them.
Here's a new set of brake pads and a new rotor from autozone. Notice
how the inside of the rotor hat is finely machined to accept the
minature set of e-brake shoes?
Now the new rotors can be installed
Many mechanics have been known to pound a stubborn rotor off with a
large hammer. But using a 3-jaw puller to press the rotor off will
eliminate the chance of damaging the axle shaft & carrier bearings
causing expensive repairs in the future.
To figure out whether your car has phenolic or steel pistons inside the
rear brake calipers, you need to flip a coin:
Since the coin
flip is inaccurate about 50% of the time, many crownvic owners just
purchase both styles of brake pads for their crownvic and return the
pad set that they don't need. Some retail autoparts stores frown upon
this method of purchasing brake pads, but the local autozone was
friendly and didn't mind.
Notice how one pad has the large rosebud clips and the other the small
This poor car has a multitude of problems. Not only have hydraulic
& mechanical brake systems failed, but the front passenger side
aftermarket napa swaybar link seperated at the ballstud too. This
caused the swaybar to bang up against the control arm. Also, the brake
hose has lost significant amounts of material from rubbing against the
remnants of the broken swaybar link and appears likely to burst open in
the near future.
The big problem with this aftermarket lubed-for-life swaybar link is
that the boot doesn't seal out moisture. This allows water to get in
and corrode things resulting in joint failure.
Be warned that napa is still selling this poorly engineered stabilizer
link for use on people's cars. I was tempted at the time of failure to
open a complaint with the NHTSA
about this part. Not only will the car sway a lot side-to-side without
a working sway bar link. But the hydraulic brakes will fail too from
flex hose abrasion if the car is driven enough. This part was not very
old when it failed and did not have very many miles on it either.
Here you can see the back of the stabilizer link ballstud still
attached to the back of the steering knuckle
Being a new england car with lots of exposure to chloride salts, the
bleeder screws on both front brake calipers are seized in place. So two
remanufactured brake calipers are going to have to be installed before
the new brake flex hose and metal tubing can have the air properly bled
out of them.
Replacement emergency brake shoes & hardware kits for 1996-2002
crownvics are avaliable aftermarket. Aftermarket offerings include:
Autozone H7415 Hardware Kit
(Also sold as: Dorman HW7002 Hardware Kit)
Raybestos H7002 Hardware Kit
Raybestos 745PG Parking Brake Shoes
Autozone 745 Parking Brake Shoes
And here are some pictures of an F7AZ-2C220-AB backing plate adapter
for 1997-1998 crownvics
Somewhere along the line, the spring near the adjuster wheel appears to
have gone missing
This backing plate is in really nice condition having never been
installed on a car. Usually, you'll find the backing plate has
significant rust on 10+ year old vehicles. Some people have evern
reported that the backing plate on their car rusted completly through
near the points where it mounts, though this does not appear to be a
very common occurence.
Here is the backing plate with a F8AZ-2C190-AA antilock brake sensor
To remove the axles from the car, you need to push the antilock brake
sensor out of the backing plate adapter. This is really easy to do when
all the parts are new. But on an older "salt belt" vehicle, you'll
often damage the sensor beyond repair when it is forced out. The
ferritic backing plate expands inwards as it corrodes, effectively
rustjacking the sensor in the backing plate adapter.
Here's a closeup of how the emergency brake cable connects
Here's the end of the e-brake cable that connects to the backing plate
Here's the self adjuster that hangs under the car near the rear drivers
The ebrake cable comes in a few different sections that need to be
spliced together. Here is a closeup of where the cables would normally
This is the rubber insulator that suspends the cable away from the
Ford service part e-brake diagram
Adapter backing plate assembly part #'s:
F1VY-2C220-A (1991-1995) (Discontinued - Obsolete)
F2AZ-2C220-A (1992-1992) (Discontinued - Obsolete)
YW1Z-2C220-AA (1996-2000) (Replaces F6AZ-2C220-A & F7AZ-2C220-AA
& F7AZ-2C220-AB )
Parking Brake Shoe Linings
7U2Z-2V753-A (Replaces F6AZ-2N712-A & F6AZ-2N712-B &
Axle service part #'s:
F2AZ-4234-B with ABS (28-spline) (replaces F1VY-4234-B) (1992-1997)
F2AZ-4234-C without ABS (28-spline) (replaces F1AZ-4234-A &
F3VY-4234-A lincoln towncar limousine (31-spline) (replaces
F8AZ-4234-CA without ABS (28-spline) (1998-2002)
F8AZ-4234-DA with ABS with stamped steel abs tone ring (28-spline)
F8VZ-4234-AA lincoln towncar limousine (31-spline) (1998-2002)
1W1Z-4234-DA with ABS with pot metal abs exciter ring (28-spline)