perseus

My '95 GT stock vert started vibrating badly at 1000 RPMs and then over 3500, so i took it to the shop for a tune up, but when i picked it up, vibration is still there, the guy at the shop says maybe the damper shifted and that causes the engine to vibrate, but the weird thing is that below 1000 and between 1100 and 3500 it desnĀ“t vibrate at all.

Any suggestions?

86HOGT

Is your car stick shift? Maybe the flywheel went unbalanced.

mdvaldosta

I'd look into the balancer (dampner) first, flywheels are a solid piece of steel. Your dampner has a rubber insulator ring in it, thats why it can shift. The easiest way to check that is with a timing light - just unplug your spout connector and see what its showing your initial timing to be. Stock is 10*, and thats where it should be unless you've bumped it up - then you'd know where it is. Of course - no way its higher that 15*, so if it doesnt fall in that range then you know what you need to replace. It could still be a major engine problem, but thats where to start (and hope it ends)

perseus

So if I understood correctly, if timing is not between 10 and 15 degrees the dampner's rubber insulator must be replaced.

It has an automatic transmission.

Thanks for your replies.

pro5.0stang

harmonic balancer. mine did the same thing last week first at 1500 and 4000 rpm. then the rubber broke .!!is sucked