vibration/buzz problem in seat,floor & pedals

[gtp2002]

I have a 2002 GTP with 94,000km +- 60,000 miles, I've have this buzz/vibration now for the past 20,000km. It only happens once, only after I started the vehicle, and only after moving forward about 3-5 feet. It only last a second, but last longer if I really leave slowly.

I also seem to have a vibration at highway speeds(not the same intensity) it feels like I can sense all the roads imperfections.

Anybody have any sugestions on what it might be caused by? and if both noises are related?

[gtp2002]

sorry forgot to mention that the car also shakes between shifts, either at the end or begining of a shift (1-2, 2-3, 3-4)

[richtazz]

sounds like a possible pwm solenoid/valve going bad. I would have said a shift solenoid, but since it does it in all shifts, I'd say it's a PWM.

[gtp2002]

Originally Posted by richtazz

sounds like a possible pwm solenoid/valve going bad. I would have said a shift solenoid, but since it does it in all shifts, I'd say it's a PWM.

PWM??

[richtazz]

it's a valve in the front pump assembly that controls shift pressure.