See my Cave, Torque StrutNew style rubber bushings will push out under load.
Look better but is a weaker product vs old style. That could be part of problem.
Also machining new style bone to accept polly/etc makes them weak
. Metal inside does same job as old style w/ metal on outside.
V6 engine get less vibration then L4.
V6 and old L4 w/ two auto trans mounts get less vibration.
Main thing here is transmission...
Manual trans polly or hard rubber won't transfer vibration at idle... you're out of gear or clutch is pushed.
Auto make more vibration because anyway pushes engine load and the vibration thru the dog bone. Remember, Auto in Drive at idle is in 1st gear.
If car has stick then may not matter.
If car has auto then can, likely will, get more vibration w/ polly, maybe hard rubber, but not nearly as bad as L4 w/ 1 auto mount. The later L4 w/ auto mounts setup will rattle your teeth and wear out new style rubber bone fast. I hate using polly dog bone but I hate breaking exhaust etc more. I don't have money to try RD hard rubber. I think I have good old style but not sure.
Note than if a bone is bad then check/replace any dead engine and trans mounts. Dead mounts can cause bone death and vis versa.
------------------Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)The Ogre's Fiero Cave
(It's also at the top and bottom of every forum page...)
[This message has been edited by theogre (edited 08-16-2014).]