Just a note on this, it might just have been generic terminology, but for anyone filling the driveshaft carrier bearing rubber bushing, you do not want to use a "butyl" material. You are looking for a polyurethane windshield adhesive. Butyl caulk was commonly used for sealing gasketed windows, but butyl has no physical strength in either the non-skinning or skinning variety. Again, it could have been terminology but I'm just clarifying for those looking into the mod.
-PJ
