The stock rear shock mounts on many trucks and 4Runners utilize a steel t ube onto which the shock bushings fit. This tube is internally threaded a nd the shock is held in place by a bolt threaded into the tube.

Many RS9000s have eyes with an inside diameter that is not much larger th an the shock mount tube. As a result, there is not much room between the tube and the shock eye for bushing material.

This lack of space, combined with a stiff poly bushing, prevents the shock from angularly flexing eas ily. On '84 and newer trucks where the shock mount tubes run parallel to the axle, this can cause some binding when used with a long travel rear s uspension. Using the rubber RS5000 bushings will allow greater angular sh ock flex.

The shock mount tubes are internally fine thread metric and have to be mo dified to use this mounting method. Tap each of these to 1/2" UNC thread. I found I could simply retap the holes without doing any drilling. The s hock is than mounted on the tube using the original inner washer and two rubber bushings.

The shock is held in place using a 1/2" x 1 1/4" hex bol t, 1/2" flat washer, and 1/2" hex nut. These pieces are assembled in this order and tightened together as a unit.