gmkilla

OK, i finaaly got my car running right and all alligned and set to go. Runs good, rides real nice and is perfectly smooth even at 90 mph...at least when i am in gear. When I let off at around 80 (this doesn't happen at 65 or even 75,) theres a vibration that you can feel and hear though its not bad, but if I push in the clutch on the highway at those speeds it gets real loud and more noticable, and i'm not sure what it is. Any ideas? THanks guys.
the other killa

VertStangGT86

Well if it happens when you push in the clutch pedal then that eliminates the engine and probably means it's from the tranny back.

roundman

could be some excess backlash in the rear end gears that gets worse when you take it out of gear and the engine drag on the gears goes away letting them freewheel and rattle back and forth due to extra clearances.

e40water

I would take a look at youre transmission mount, then work youre way back to the rear end,

gmkilla

thanks for the advice guys, i'll look into everything

chriscindy6369

If your using a Standard trans it could even be Thrust Bearings on your crank. I used to run a Very strong clutch on the street, and did too much city driving and it cost me. I worn out the Thrust bearings. How you can tell is Have someone Look at your lower pully and then you press in your Clutch. If the pully moves then thats what the problem is. Keep us posted

gmkilla

well...i hope its not that, but it'd be a great excuse to build a new engine...i'll let ya know