Thank you very much Mr. Frank and JMela.

First of all I'm sure that this sound is not coming with wheels or wheel bearings, because sounds occurs when I push on accelaration pedal at the initial acceleration and it looks like sorry but roughly 'tiny cııııırt sound'. I checked it comes from center bottom. It' more when going uphill more than normal.

About drive shaft central bearing, in fact I had problems with balance because there was noticeable vibration and I brought shaft rear(long one) for balancing to specific shaft balacing shop. I guess they already checked central shaft bearing for play any other problem.

But you mentioned me;
''to check A drive shaft component (flex disc) contacting the floor of the car. This could be caused by a separated left engine mount, or a separated transmission mount.''

I will check this flex disc but do you think it can contact with car bottom floor during initial acceleration and can cause such grinding sound?

Engine mounts were good condition therefore I could not replaced with new ones. What I can check about engine mounts? How they damage? Rubber cracks or broken over time?

Also I installed new transmission mount when I place engine with transmission on car. I had competed full restoration which took 3 years and finished previous summer.




Thank you

Kutluhan