Here you can find information regarding repairs to the crown victoria rear end system. These repairs include the
rear control arms installation, the rear swaybar information and bolt torque specs,
the rear diff fluid change procedures, and the rear end watts system installation. All of these repairs and
procedures include in depth details on how to perform the replacement and or repair. They
also contain all the detailed torque specs needed for each bolt involved in the repair.
Rear Control Arm Installation
The rear control arm on a crown victoria consists of 2 bars that connect the end of the rear axle to the frame
of the vehicle. These arms have 2 bolt
locations, the frame and the axle. Both of the arms torque specs for the bolt connecting to the frame of the
vehicle is 110 ft-lbs. While the upper control arm
when connecting to the axle is 70 ft-lbs. The bolt that connects the lower control arm to the axle is the same
as the ones to the frame being 110 ft-lbs.
Crown Victoria Arm to Frame Torque Specs : 110 ft-lbs
Crown Victoria Upper Arm to Axle Torque Specs : 70 ft-lbs
Crown Victoria Lower Arm to Axle Torque Specs : 110 ft-lbs
Rear Swaybar Installation
The rear swaybar for this vehicle contains a series of brackets that hold it to the vehicle and then endlinks
that connect one end of the car to the other. The
torque specs for the endlinks are 15 ft-lbs. While the torque specs for each bracket bolt is 18 ft-lbs.
Crown Victoria Swaybar Endlink Torque Specs : 15 ft-lbs
Crown Victoria Swaybar Bracket Torque Specs : 18 ft-lbs
Rear Differential Fluid change
The first step in replacing your rear end differential fluid is to jack the rear end of the vehicle up into the
air. Be sure to use safety precautions so that
no injuries occur. With the vehicle in the air you will have clear access to the rear differential. If you want
to check the current fluid level you can
pop off the rubber plug, if the level is full the fluid should be directly below the level of the plug. If it is
lower then your are currently low on fluid.
To replace the fluid inside the diff you must remove the plate and allow for the fluid inside to seep out. Be
sure to have a container to catch the fluid.
Once the fluid stops flowing you can reinstall the plate by using some silicon sealant to help prevent leakage.
The bolts for the plate should be torqued to 30 ft-lbs.
With the plate reinstalled you can now take your new fluid and fill the rear end up through the rubber plug
hole. Once done reinstall the plug and ensure that there are
no leaks.
Crown Victoria Differential Cover Torque Specs : 30 ft-lbs
Watts Link Installation
The crown victoria rear end contains a watts linkage system that assists in holding up the rear end. Within this
system are two arms which bolt to both the frame
and a centerlink. The torque specs for bolt holding the arm to the frame is 75 ft-lbs while the torque specs for
the arm to the centerlink is 70 ft-lbs. There is also
a stud within the differential housing, this torques to 200 ft-lbs. Finally the location where the centerlink
connects to the diff housing is tightened down to 185 ft-lbs.
Crown Victoria Watts Link to Frame Torque Specs : 75 ft-lbs
Crown Victoria Watts Link to Center Torque Specs : 70 ft-lbs
Crown Victoria Centerlink Stud Torque Specs : 200 ft-lbs
Crown Victoria Centerlink to Diff Nut Torque Specs : 185 ft-lbs
Rear Shocks Installation
To replace the rear shocks on a crown victoria you will need to remove two sets of bolts/nuts. The first being
the one located on the top of the shock.
This one can be accessed by the truck or through the side of the vehicle with a wrench. Once this one has been
removed the next bolt is located on the bottom
of the vehicle. Once the bottom bolt has been removed the shock can be lowered out of the vehicle. The new part
can now be placed in the vehicle much the same
way that the old one has been removed. When tightening the bolts back up make sure to torque the top nut to 30
ft-lbs. The lower bolt on the shock must
be tightened to 66 ft-lbs.
