tzeseong

Dear guys,


i notice there is some 'wave grinding noise' on my panamera 4S v8.

it only happen on 7th gear from 1000rpm to 1400rpm when i put in a little load with my right foot.

attached is the video. if you notice the rpm needle actually skips a little and that is when the wave grinding noise is noticeable.

will need to turn on the volume to have better hearing

any advise and any idea what could went wrong on my car?

hopefully forumers here could help me out

Hawk375

do you feel any vibration while the tach is fluctuating?

tzeseong

i dont feel any vibration on the steering wheels nor my car is vibrating.

is just that wave grinding noise at that RPM on 7th gear with a little load on the accelerator.

most noticeable is when you are going on a little uphill road...

Hawk375

can you get it to fluctuate between 1000-1400 rpm in any of the other gears in manual mode? or even while in park?

tzeseong

i dont get fluctuate on 1000 to 1400rpm in any other gears on manual mode.

when in park/stationary there is no fluctuate also.

Only when im on 7th gear - be it on manual mode or auto mode

Hawk375

not sure what could be causing that, you might want to take it in for a diagnostic

M S

Hi-

Mines is doing the same exact thing!!!!

Did anyone ever resolve?

Panamera2014

I haven't resolved my tick sound yet. Five month ago the Porsche dealer in Jacksonville, Fla told me at first that this sound was normal for these cars. Then a month are so later my check engine light comes on, so off to dealer to get it checked and I told service rap to solve that ticking sound while working on my car. Almost a month later at the porsche shop for a heavy $6000 they solved the check engine problem but the tick was still alive and well to this day.

smithsor

My 2011 Panamera Base (2WD) 80k miles, does the same thing. 7th gear only, slight gas pedal, only after driving many miles and warmed up. Popped into 6th and doesn't happen at same speed. I wondered if it was a mix of 7th gear and torque tube bearing being worn. Is a bit disconcerting especially since my wife noticed it and she would drive on two flat tires and not know it.

Marcus13190

Have you find a solution, my friend have the same problem.
Thank's.