Transmission Mount Insert Set (4.1138R) by Energy Suspension. Red. Energy Suspension offers replacement mount bushings for engines, transmissions, engine subframes, differentials, transfer cases, as well as bushings and grommets for torque arms that brace engines, transmissions differential pinions, crossmember brackets, and even skid plates. Resilient polyurethane construction found on each and every one offers greater resistance to deterioration from road grime, oily contaminants, and salt slush while ensuring they will not deteriorate, crack, and sag like OEM rubber. Depending on application, bushings and mounts may be equipped with zinc-plated steel bolts, nuts, washers, and other hardware necessary for easy bolt-on installation.