My car vibrates like a massage chair when im on the freeways. It responds to MPH. and even when i put the clutch in, or put it in neutral on the freeway, it still vibrates. I replaced my driveshaft with a mazdatrix one not long ago, and got new rims/tires. i dont think its balance because the vibration is still there after the new rims. Any ideas?

 

maybe worn out or busted motor mounts?

 

i thought that too, because my mounts are looking hella tired. but it happens in neutral too, i/e no load on the engine...

 

https://www.rx7club.com/showthread.p...hway+vibration
https://www.rx7club.com/showthread.p...hway+vibration
https://www.rx7club.com/showthread.p...hway+vibration
https://www.rx7club.com/showthread.p...hway+vibration
https://www.rx7club.com/showthread.p...hway+vibration

I'd like to introduce you to the Search button...

 

bahaha, i think i know what it is thanx. i just did a clutch and pilot bearing in my car, didnt mark the driveshaft, probibly put it in 180* off.

 

free revin' in my N/A I had crazy vibration, replaced both mounts and fixed the 5th port = no more vibration