I just ordered a Quaife to have installed in my MTX-75 from a 99 Contour SVT. I thought I would just need the gears the shims and the speedo gear but I see that the parts list mentions a "Differential Ring Gear (Zetec)". Does this mean that only zetecs need this or is that where the part is coming from? So basically do I want/need this for installing the quaife?
