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vibration/buzz problem in seat,floor & pedalsgtp2002 09-27-2005, 11:39 AM 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 09-27-2005, 11:58 AM 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 09-27-2005, 12:12 PM 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 09-27-2005, 01:04 PM 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 09-27-2005, 03:27 PM it's a valve in the front pump assembly that controls shift pressure. vBulletin®, Copyright ©2009, Jelsoft Enterprises Ltd.
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