Vibration Problems
 

Ok, this is my problem. When I drive in the street doing under 55 car feels fine, once I hit the parkway and hit 60 and over I have a very bad vibration through out the car. When I take my foot off the gas the vibration stops and if I hit the gas the vibration starts again. What the hell is this?

Need a bit of info... tell us about the car - year, model, engine, trans and any major mods.

And not really an "Advanced Tech" problem.... try and pin it down to the engine, drivetrain of suspension, and I'll move it to the correct forum.

ok it's a 79 camaro z28 with a 360ci about 500hp, 350 trans, everything is new. I even started to change things even though its new, just did the driveshaft over but kept the old yoke. did a entire exhaust system. I see that the header is close to the a-arm. I had already banged it , but it still looks close, maybe its hitting the a-arm when i'm driving. I'm lost over here, and the bad thing of doing a car as brand new, there are always alot of bugs to get out. just seems like there is never an end to them. I hope this helps you out. Thanks

Vibration Update
 

Ok I had taken the car out for a test ride after I had fixed the wrong angle of the tranny. The car still makes that vibration feeling after 55 but what I did was on the parkway doing 60mph I had slipped the car in neutral and gave the car gas and brought up the rpm's and I felt the vibration feeling. What could that be?. Also If you can give me your in put of this, I had Installed a new oil dipstick what direction does the stick go. I had faced it curved in towards the motor and found out that the dipstick was cut up. Hope I didn't hurt the engine. Thanks for your help