I just did my wheel balancing and alignment not long ago, and also change two front tyre.
When the car going below or 100km/h is ok, but once it over 101km/h, the car suddenly feel very shake. May i know what cause the problem like that?

will taking out tyre effect over wheel balancing?...coz that day i change brake pads, then vibrate again around 110km...then redo over wheel balancing, yesterday night, driving along federal, felt the steering shaking and vibrating...but then after sometimes no shaking/vibrating..but very minimal..la... ....wads the problem?...if i din hold the steering, it will vibrate slightly..even over balancin has done..

Since my problem almost the same, dun think i ned to open new thread. Last weekend, went back to my hometown in Perak. To & fro with average speed around 120km/h - 135 km/h, no problem happened. This week, i went outstation from Monday - Wednesday, came back on Thursday. Went by plane, so i parked my car at my office parking lot coz got roof & security guard.    So, the problem is since thursday till now, my car shaking very badly when i drive over 100km/h, as if the engine wanna fall off. Does it happen because drive shaft oso? I already change my front drive shaft late last year, not even one year. Need advice here coz dun wanna go to workshop with zero knowledge of the possible cause of the problem. Nowadays, too many dishonest w/shop, later they will charge me for something that i dun even have to change. Thanks in advance.

BTW, some info about my car -  Proton Wira Aeroback 1.5 (manual), 2002 made.

It shakes when the speed over 100 km/h.. I mean, when i accelerate over 100 km/h the car starts shaking even when i let go the accelerator pedal as long as the speed still over 100 km/h.

Hmm.. seems like i have to change my driveshaft yet again.