my 2004 xjr has a vibration around 2000 rpm the faster i go the less it felt i had 1 bent rim repaired at 1 motor mount also done but i still have the issue
what could it be driveshaft etc etc

alberto

 

Get the wheels balanced? It worked for me.

 

Gentlemen
I should have explained my self better I have a vibration around 1800 rpm with the car either in park neutral or driving what can cause something like that
supercharger is in the process of being swap knowing my rotors are chattering making loud noises could that cause vabration.

thank you

 

Hi Alberto,

did you find the source of your vibrations? I have a 2004 XJR too and since I own the car the engine vibrates at 1.800 rpm. TH whole car shakes an I can feel it in the seat + steering wheel + dash. The vibrations appear when the transmission is in D/R but also in P/N when standing still and revving up to 1.800 rpm. I thought it might be the engine and transmission mounts but nope - changing them did not make any difference :/

Thanks!

 

Sounds like motor mounts to me.

 

Thanks for the input! That was my first guess too, so I replaced them (both engine mounts and also the transmission mount). The engine now runs way smoother but the strange vibration at about 1.800 rpm is still there ...