I want to upgrade the transmission and motor mounts, I have searched the forum regarding the motor mounts, and i have narrowed down to 2, 997.1 MM or x73 MM, can anybody give a comparison between the two, is the 997.1 MM and upgrade? or would a x73 be better as i could not find any comparison. I know the 997 ones are liquid filled, not sure about the x73.
I planning on going with the 997 transmision mount.

thanks

 

Im doing a 997 trans mount w window weld mod on Sat. Id be interested in hearing about "better" (non solid) motor mounts as well.

 

If you want to stick with factory parts, Suncoast sells a 964RS engine mount kit that is solid rubber with no liquid filling. Anything will liquid inside is going to fail before anything that is a more solid material. The 997 tranny mount is also has more rubber in the inserts. If you're willing to go after market, Torque Solutions has a semi solid motor mounts (that claim not to cause sonic vibrations that set off the engine knock sensors) and a factory tranny mount that filled has polyurethane inserts instead of rubber.

 

torque solutions.