I have a Daihatsu Terios sports which has started to judder intermittently. Initial thought was a flat tyre so I stopped and checked them and they were all fine; I started the engine again, small amount of juddering which stopped after 0.5 miles. Have driven 3 mile journeys 2 days running with no problems, then drove a 4 mile journey and the noise occurred 3 times, getting so loud that I stopped the car and my passenger again checked tyres and exhaust. Sounds like the noise is coming from under the car. Is not affected by putting the car under load going uphill nor coasting without gears. Does not affect the steering. Have had a garage look at the prop shaft and suspension and they say there is nothing they can see which could be causing the noise. Engine sounds fine. Any suggestions, guidance please that I can tell the garage to look for - Im a female pensioner so am not going to be looking under the car myself!