每天早上(shang)冷機(ji)起步換擋(dang)的時(shi)候(hou)發動(dong)機(ji)都會(hui)發出滋(zi)滋(zi)滋(zi)的共(gong)震聲音,1擋(dang)到3檔最明(ming)顯,有沒(mei)有人遇到過?