00 gp still shakes

[justav6]

2000 grand prix gtp. I posted this question a few times a while back and never was able to resolve this issue. i got so frustrated i just parked it for about a year, but now i need it back on the road. while driving the car shakes when im on the throttle, but not while coasting. feels like a wheel hub is loose. i have taken it to at least 5 mechanics including dealerships and all say its something different, and after doing work the problem remains. the shake is worse the faster im moving, but isnt effected by how much gas i give it. i have had wheels balenced, wheel hubs, speed sensors, tires and brakes replaced. computer scan only codes evap small leak, which I cant see being in any way related. I just got my car out of another shop for brakes and tires, they checked the front end suspention mounts etc and was told everything looks good. I am at a complete loss as to what this could be or what to do.at this point its been an issue for 3 years. if i cant get this fixed im just gonna have to get rid of it. somebody please help! any info advice or ideas would be greatly appreciated.

[rickisrad]

check your engine mounts. you have the two dog bones up top, the trans mount on the left and engine mount on the right. the engine and trans mount are hydraulic and often leak. have someone trustworthy torque the engine while in drive and foot on the brake, look for excessive movement from the mounts. other than that maybe transmission related? what are the problems that the dealer is telling you?

[olopezm]

Are you having any noises?

Oscar.