FORDMUSCLE webmagazine: Installing Energy Supension Polyurethane

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Engine and Transmission Mounts
Mustang 5.0L engines are known for their impressive low-end torque. Add in a T5 transmission with its low 3.35 to 1 first gear ratio and you have a recipe for rubber transmission mount flex and failure. Many guys step up to a solid mount to get better torque transfer and no flex, however this transmits harsh vibrations through the transmission. The polyurethane transmission mount and bushings are a better option that will increase strength and minimize "rolling" over of the transmission (which can result in change of driveline angle) - without the added cost of harsh vibrations through the floorboard and shifter.

The stock AOD/T5 transmission mount is a poorly constructed piece. Note the large spaces between the rubber and steel, making it prone to flex and inevitable separation. The Energy Suspension mount features a fail-safe interlocking design within the polyurethane encasing.		This mount is significantly more rigid than stock, yet provides vibration dampening that a solid mount cannot. Although we did so, it is not neccesary to remove the transmission in order to install the mount. Note alse, the center hole in the mount is not used.

The transmission crossmember bushings are easily removed. Slide out the sleeve, then pry out the rubber bushing.		Install the polyurethane bushings on each side, then slide in the supplied sleeve.

Engine Mounts
One of the common problems resulting from increasing horsepower is the tremendous stress placed on the engine mounts. We've torn apart the driver side rubber mount on many of our performance cars. Most enthusiasts resort to either using an engine torque strap, or in many cases converting to a solid motor mount (fabricated from steel or aluminum.) As one can imagine, a solid mount results in no absorption of engine vibrations, resulting in an unpleasant ride for anything but a full on race car.

Polyurethane makes an excellent alternative to solid mounts. The Energy Suspension late-model Mustang engine mounts are not only of a stronger design than OEM, the polyurethane maintains a high level of "ride comfort" by absorbing vibrations.

The Energy Suspension mounts are a three piece design (shipped left and right side). Notice how the polyurethane is molded around the bracket for superior strength.		With the car supported on jack stands, remove the large 14mm nut which secures the motor-mount to the frame member. There is one per motor mount and it will be reused with the new mounts.

Using wood to prevent damage to the oil pan, jack the motor up under the oil pan. This will lift the engine and mounts off the frame member.		Next, remove the motor mount to block attaching bolts. There are two per mount, and the rear bolts typically require a socket extension to reach. This will free the motor mount.

It takes a little patience to get the mount out. You may need to jack the engine up even more. Be sure to keep an eye on wires or hoses overstretching as you raise the engine.		A good example of what happens to rubber over time as it is exposed to pressure and environmental elements.

The new mount attaches no differently than the OEM piece. Attach to the block first, then lower the engine so the mount stud passes through the frame member.		We also used polyurethane mounts in our Build a 5.0L engine project. The mounts were attached to the motor prior to dropping the engine into the car.