1998 - 2012 Crown Victoria 4.6L Torque Specs

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.

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.

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.

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.

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.

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.