Car shakes going 60mph??

[queenzauto]

watsup ppl' , i got a 94 grand am gt 3.1 v6 and the car starts to shake at 60mph but only at that speed because if i push the pedal more it will stop and accelerate more or if i deaccelerate. It only happens when i hit 60mph and thats only sometimes it doesnt happen alot can someone please tell me why? I was told it could be the motor mounts? oh and one more thing im sorry for being greedy but its just that i just got the car not too long ago and well i also noticed that inside the coolant resevoir theirs actually rust in and around the walls but a mechanic told me it isnt that serious? so should i get it flushed and risk having it clogged or should i just buy a new radiator? please and thanks for your support

[xeroinfinity]

I would say the 60mph shake would be your tires or rims.
And who ever said your motor mounts were causing this, I'd never take it to them to work on

It wouldnt hurt to get your cooling system flushed.
Rust occures when not enough coolant was used, like just using striaght rusty tap water.

I use filtered/bottled water in my cooling systems, this keeps iron and other contaminates from poluting the ssytem.

Hope that helps !

[boug0752]

Defiantly would say that it is the tires and rims balancing. Should be a pretty cheap fix for ya. I think it cost me 5 bucks a wheel to get balanced. I would also say that you need to get the coolant flushed. The less crap (contaiminents) in there the better.

[GASE 95]

i agree on the wheel/tire balance also..

mine used to shake really badly in speeds excess of 55mph. Turns out I had one bad tire that had a radial pull (the cords in the tire were not straight) which not only caused the shaking but in order to drive a straight line i had to cock the steering wheel about 10 degrees to the right.