If I install a full Roush or Hotchkis kit, will I run into problems with the dreaded vibration? After searching, the only place I have seen where it is a problem is when using drop shackles. Do I have anything to worry about with the full kit?

Thanks

 

since the roush uses springs to lower the back, i wouldn't think there would be as much of an issue. i haven't ever seen/used/installed the springs so i don't know, but i would just measure the pinion angle once you get the kit on, and use shims to adjust the angle back to where it should be.

 

Simply put, it has nothing to do with whether or not springs or shakles are used. As you stated it is the angle that has to be correct.

 

not to be argumentative, but yes it does.

using shackles, it would make the angle more negative, if using hangers, it would make it more positive, with springs i think it would be similar to the angle it was before. it is simple geometry, if the rear-end housing is mounted solidly to the spring and you raise the rear of the spring relative to the front (i.e. using shackles) the front of the housing will point down more that it did previously. the opposite would be true for hangers.

but the only way to know if and which shims to use is to measure the angle.