The first step is pulling...
The first step is pulling the old mount. Our crossmember was out, as was the trans, but it easily unbolts from under the car.
Most of the older Mopars that have made it through thirty-odd years to be around today are probably going to be around forever. Run a new car until it starts to crumble, and chances are it'll meet its end at the crusher. Take a surviving vintage machine, drive it endlessly, and it's fair to say that someone will be willing to take over keeping vigil on that treasured tin. Yeah, forever is a long time. Problem is, many of the pieces that went into building that classic mover were never designed with "forever" in mind. Go back with the same part, and it'll wear out or fail about as quickly as it did the first time around.
With modem materials, the typical life of a "replacement" part can be much greater than those that were around decades ago. Making a change while doing routine repairs can mean the job can afterwards be forgotten about-forever.
While doing some tranny work on one of our Chargers, a quick look at the soggy rubber trans mount told us its life was far from eternal. Constructed of mortal rubber, tranny mounts will always succumb to the ravages of time, with their end accelerated by the presence of seeping tranny fluid. Modern chemistry has brought us Polyurethane-tough, resilient, yet flexible and able to buffer vibration. The Year One catalog offered an Energy Suspension polyurethane tranny mount kit, an upgrade enduringly superior to the rubber it replaced.
 Swap now to polyurethane,...  Swap now to polyurethane, and while we won't promise eternal life, chances are you'll never have to worry about the trans tailhousing flopping around. Year One supplied this Energy Suspension polyurethane transmission mount kit. |  The poly replacement utilizes...  The poly replacement utilizes the original outer shell of the stock bushing, meaning the interals need to be gutted. Cooking the outer shell with a torch is one way to release the bond of the rubber to the shell, but we just used brute force. A twist with a pipe wrench will rip the inner metal sleeve free. |  Most of the rubber can be...  Most of the rubber can be pried out with a screwdriver, and if the mount is really tired, it will practically fall to your feet. |
 Before the new polyurethane...  Before the new polyurethane insert goes in, the shell needs to be thoroughly clean. A wire wheel takes it to shiny clean steel. |  Some lube will help with sliding...  Some lube will help with sliding in the poly inserts, and prevent noise or wear as the bushing moves in the bore. |  Some more grease in the inner...  Some more grease in the inner bore, and the provided center sleeve slides in. Done once, and this job is done for good. |