93_five_oh

you do know what a serometer is right?
i'm not sure you mean a serometer... because the only serometer i know of is a blood analyzer

1990lxhatch

He means syrometer. It's a coiled wire that has a dial indicating what frequency a particular lenth of that wire will vibrate at. You slowly turn the dial until you get the wire to vibrate and then note the frequency marked by the dial.
Then, you have to turn cycles per second into revolutions per minute and then determine if your vibration is engine or driveline related.
You have to do a little math but it can be helpful in some situations. I think this guy can figure it out without one though

Dandy74

ell if you know someone at a dealer you could use a eva and get three recordings from the seat track he may be able to diag the concern without one but with the correct tool and vibrate 5.0 software it makes it super easy thats all good luck!

goatnipples2002

Now the history of the car does scare me. I bought it in a somewhat mechanical hurt shape. Motor sounds and runs strong, but the u joints, throw out bearing, and pressure plate were shot. I replaced all. I have a dampner now. I thought that if it was the balancer it would do it all the time as well. I am looking into having the driveshaft rebalanced, but am broke after buying the balancer. I am not sure how long the girl I bought the car from drove on the bad u joints, but I am starting to think the tranny may be shot because of that.

I do feel it when I rev in neutral with the pedal pushed in. So does that mean input shaft bearings?

1990lxhatch

No, it just means its likely an engine vibration. Usually engine vibrations are 1st order (one cycle per engine revolution) or 4th order (four cycles per engine revolution). 1st orders are usually balancers, flywheels, pressure plates -that sort of thing. Rarely engines have an internal balance issue unless your oil is wayyy overfilled or there is a chunk of crank throw in your pan[:@].
A 4th order vibration is engine pulse. You are feeling the cylinders fire (4 hits per revolution).Cars with solid motor mounts are 4th order nightmares. 4th orders are usually tolerated a lot more than 1st orders.
Doubt it's anything in the trans. You would likely have noise along with that vibration. I'd say you have an issue with the dampner, flywheel or pressure plate.

goatnipples2002

I hope the dampner fixes it. We'll see. Thanks guys for all the help.

goatnipples2002

It does NOT vibrate in neutral with the clutch pedal in. I could have sworn it did, but no it does not. I really only feel it when it is in gear and I am driving. So what might that be? Could messed up u joints cause tranny or motor problems?

goatnipples2002

Is it possible the clutch cable isn't putting enough tension on the splines when it is in gear? If there is even such a thing.

1990lxhatch

Naw man. If you have to be moving and just had driveshaft work done - it'd bet money your driveshaft is out of balance. Even after if you have it balanced you should install in the same place as you removed it. Did you make paint marks before you took it off?

goatnipples2002

Yeah I made paint marks, but the counterweights look worn so I will look into having it rebalanced as well as putting a new balancer on. Is there any way an out of balance driveshaft can destroy the input shaft bearings or anything else?