 But if you've had any kind of drip under your car for a period of time, it don't necessarily mean that you have to have it repaired, but you do need to know what's dripping so you can make sure you monitor that fluid level. Let's say it's a rear differential seepage. You don't want to take off on a trip and that little differential has been seeping for the last year, and then you're taking off and you're very low in differential fluid because you can cause some damage there.