i heard that happening from a bad harmonic balancer?

 

How does a Harmonic balancer go bad or is it just loose. but will it vibrate all the time or some times.

 

i have heard other people with you same problems shaking in the car and in the pedals,that what their problem was. dont know what goes bad in it but just a thought on something to check on. maybe someone else knows more about them on here?

 

I know if your in park and easy the RPMs up and you get to 1500to2000 rpms it start and its not as bad if your going down the road tho. and if you past it it goes away and if your before it it dont do it eaither. Just in that RPM range.

I just went out there and the header is right near the stering arm. how far does the header has to be from the stering arm.

 

Catch me if I'm wrong, but your tranny is in the front of the car, therefore your driveshaft is directly coupled to your diff. Your driveshaft turns the same RPM per MPH no matter what gear you're in. So if you put it in overdrive, wouldn't it still vibrate at the same range of speed? I think that rules out the shaft.
If it was a harmonic balancer problem, it would be there all the time over a certain range of engine RPM. Putting the car in neutral shouldn't affect that at all.
I think it sounds like an engine/tranny mount problem, I suspect you have a worn or broken mount. It doesn't matter if all the bolts are tight if one of the mounts is broken or damaged. If it's a 94, they're probably pretty shot if they're the stock rubber set..

 

wheel/tire balance....

thats the perfect speed for that kind of vibration to occur also.

 

Good year eagles is what I have on the car 2. 245x50xzr16

 

Shifting into overdrive wouldn't stop tire vibration..

 

tire and size doesn't mean anything when it comes to balance. You can have $4,000 dollar tires and you'll still have to have a balance. Its pretty easy to throw a weight that keeps everything balanced too. I think tire shops charge about $4 a tire to get them balanced.

 

I went to at Pep Boys and I was gonna get a harmonic balancer and they told me that I needed to get a motor code for they now what one to get me.They said right down the Vin number and call the dealer ship and they will tell the code for I can get one. I told them that it was for an 94 Z28 isn't that all they needed to now.