I have this problem for more than a year. I went to different shops for suspension inspection. None of them identified what the problem is. All they were saying "Everything looks tight there". Good but do not solve shaking problem. I replaced front shocks, did wheel alignment and balance. Didn't help.
The problem occurs occasionally (maybe 1-2 times per day and lasts for 1-3sec). Steering wheel is a little bit tight though. Do you think if I loose wheel adjustment it will help(i don't know if it's dangerous). Any suggestions on the problem causes?