I just put on the Energy Suspension poly motor and tranny mounts. All were trashed, so I think I have less vibrations now. I understand the thinking of rubber, but seems to me the poly will last longer
I had Brown Dog motor mounts with the rubber bushings. It looked really cool but with my every day rider I went back to stock due to the vibration. I read that a four cylinder Jeep vibrates more than the six. At least I got half of what I paid for them selling on eBay.
"You got to cry without weeping
Talk without speaking
Scream without raising your voice"
Never be afraid to try something new. Remember, a lone amateur built the Ark. A team of engineers built Titanic.