vibrating shifter above 75mph
 

Hi! (2004 ltd coupe,117k)
Let me start out by saying this forum has kept my car up and running without being exploited by dealerships. Lately i have noticed that at speeds above 75mph my gearshift tends to vibrate. past 80mph it vibrates rather violently, but i cant really keep an eye on it cause im driving at speeds of 80mph. :eek:
I bought engine and trans. mount/s, but have yet to replace them. i have been reading up on the subject and i have heard "gearshift bushing" mentioned in regards to vibrating shifter. also some people are saying flex disc/guibo.
i dont know if its worth mentioning but when putting her in park there is always a metal click/popping sound. also,there are spots on the airbox where it is rubbing up on the insulated hood liner on the uppermost outer back corners of the box.
should i jump to conclusions and replace the mounts for both engine and trans. along with the gearshift bushing? or do you think the vibrating shifter is a driveshaft issue? the higher speed the more violent the shake. needless to say im going 70 on the dot. HELP?
if i dont get a reply soon i think i will jump the gun and have the shop do the mounts.

Re: vibrating shifter above 75mph
 

The engine mounts on these are notorious for failure.

Two things that lead me to believe it's the engine mounts:

• Abrasions on the airbox (from the engine flexing too far)
• Vibration in shifter increases as speed (RPM) increases

In this one case, it's almost worth it for anyone to have a shop do the repair, as the swap is a nightmare and nearly impossible to torque to specs.