TKX Rear Shifter Location. These Hurst transmission gaskets provide a simple, no silicone installation. They use an aluminum carrier, silicone elastomer beading, and a rubber coated binder to create a strong, long lasting seal. Whether it's your daily driver, race car, or an off-road rig these premium transmission gaskets from Hurst have you covered.. No silicone required_x000D_ Torque to manufacture specs.