Energy Suspension Transmission Mount for GM — 3.1108R Polyurethane Direct-Fit, Hyper-Flex Durability

The Energy Suspension 3.1108R is a direct-fit polyurethane transmission mount engineered for GM vehicles to replace worn rubber mounts and restore drivetrain stability.

If your GM's transmission mount is cracked, sagging, or allowing excess movement, the 3.1108R offers a tougher alternative to stock rubber pieces. Manufactured by Energy Suspension, this mount uses the company's Hyper-Flex polyurethane formulation to resist oil, road salts, and other contaminants that commonly degrade rubber mounts. It is designed for durable, long-lasting service while maintaining the correct alignment and isolation for transmission components.

How does the 3.1108R improve drivetrain stability?

The polyurethane body of the 3.1108R is firmer than stock rubber, reducing unwanted motion under acceleration and shift events. That translates into crisper transmission feel and less strain on related hardware. The more consistent material properties also help maintain alignment over time.

• Hyper-Flex polyurethane resists permanent compression and retains shape.
• Reduces engine/transmission movement during load changes.
• Helps prevent premature wear on driveline brackets and bolts.

Will this mount fit my GM vehicle and how direct is the replacement?

The 3.1108R is built as a direct replacement for compatible GM transmission mounts, matching bolt patterns and overall dimensions for straightforward swap-in installation. Always check vehicle fitment lists or compare with the removed mount to confirm compatibility. Installation typically uses existing hardware and factory mounting points.

• Designed to mirror OEM mounting locations and bolt holes.
• No custom fabrication required when matched to correct GM model years.
• Works with standard tools for most DIY installs or by a professional mechanic.

How does Hyper-Flex polyurethane handle contaminants and temperature?

Energy Suspension's Hyper-Flex formulation is engineered to withstand oils, greases, road salts, and ozone that commonly break down rubber components. It also resists permanent compression, so the mount maintains its damping and support characteristics across temperature swings. This means longer service life in typical driving environments.

• Chemical resistance reduces swelling and softening from fluids.
• Less prone to cracking from ozone and UV exposure than rubber.
• Maintains load-bearing shape under repeated thermal cycles.

What should I expect during installation and routine maintenance?

Installation of the 3.1108R follows standard transmission mount replacement procedures: support the transmission, remove the old mount, position the new unit, and torque bolts to factory specs. No special adhesives or modifications are required. Routine maintenance is minimal — periodic visual inspections for secure fasteners and surface damage are typically sufficient.

• Use a transmission jack or lift to safely support the drivetrain.
• Torque bolts to manufacturer-specified values to prevent loosening.
• Inspect for fluid leaks that could contact the mount and address leaks promptly.

Who is this for: The Energy Suspension 3.1108R is ideal for GM owners and technicians seeking a longer-lasting replacement for a worn or failing transmission mount. It's well-suited for drivers who want improved stability over aging rubber mounts, performance-minded enthusiasts seeking firmer drivetrain control, and professional shops looking for a reliable, OEM-compatible polyurethane option. If you require a direct-fit mount that stands up to contaminants and repeated loads, the 3.1108R is designed to meet those needs without altering vehicle geometry.