Over the time I've owned my car I've always aimed to replace bushes with something stuffer when it came time to replace. Just recently I replaced the gearbox mount with a solid filled version of my own brewing and it has perhaps done more damage than good. Firstly it raised the 60A up more into the tunnel, which is what I was aiming for but now that I have finally blown a diff ( and perhaps the replacement) is it possible that the increased angle of the box has angled the diff so under high load corners the pinion bearing runs dry, or by that same thinking is it possible that my gearbox output bearing is being run dry? The rear isn't lowered essentially.