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How to Install BMR 8.8 in. Differential Bearing Kit (79-04 All) on your Ford Mustang

Tools Required
  • Jack and jack stands
  • Sockets and wrenches – 18mm
  • 2.25” wrench, large Channel-Locks, or BMR stubby wrench #SW009
  • Large dead blow hammer or hammer and block of wood
  • Pry-bar
  • Blue Loctite
American Muscle
Shop Parts in this Guide

INSTALLATION:

1. Lift the rear of the vehicle and  support with jack stands  under the frame rails.  

2. If you want to, removing the  wheels/tires will allow more  light and more access to the  work area.  

3. Using a 18mm wrench and  socket, remove the bolts for  one of the upper control arms  as seen in IMAGE 1. Remove  the control arm. NOTE: Do not  remove both sides at the  same time.  

4. Removing the factory upper  bushings can be difficult. An  air hammer is probably the  easiest way. Other options are  drilling out the rubber until  the center of the bushing falls  out then knocking out the outer sleeve with a hammer. IMAGE 2 shows using an air hammer to get the job done.  

5. Once the old bushing is out, sand or file the inside of the bushing mount on the rear end to make a smooth bore for your new aluminum bearing cups.  



6. Lightly oil the inside of the bore.  

7. Drive the BMR aluminum bearing into the bore using a large dead blow hammer as shown in IMAGE 3 on the next page.  

8. Once the bearing is seated, apply Loctite to the threads of the retaining nut. Thread the nut onto the housing then tighten it with a 2.25” wrench. NOTE: BMR sells a low cost stubby 2.25” wrench for this application. Also you can use a large set of Channel-locks, although it will mar the aluminum.  

9. Insert the bearing spacers as shown in IMAGE 4 then replace the upper control arm.  

10. Repeat this process for the other control arm.  

11. Re-install the wheels/tires if removed then lower the vehicle.  


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