Rattles come in all shapes and sizes. Some can be small and annoying, while others can sound like your transmission is about to fall out. The latter is often easier to find; just look for the loose parts.
The smaller rattles might be harder to find. For those, you can use the methods shown in the Finding Noises video (shown below) to help pinpoint their location. One common source of rattles is loose exhaust shields. These can be fairly easy to fix. I normally take a hose clamp or series of hose clamps and tighten them around the loose exhaust part. Here’s a video showing that process.
Video Title: Rattles – Diagnosing Noises in Your Car – EricTheCarGuy Video Description: In this Article we talk about Rattles and how they can be found in your automobile. Thumbnail: http://www.ericthecarguy.com/images/faq_buttons/Large_FAQ_Images/Noises-icon-1200.jpg