Transmission fluid keeps your transmission lubricated. This prevents expensive issues from developing such as gear slippage, shifting problems or a overheated transmission. That is why it is important to consistently get your transmission fluid checked. One way to check if your car needs a transmission fluid change is to get a little bit on your fingers and rub it around, if it is pinkish and clear then you are good to go! But, if it smells burnt or has particles in it then its time to bring it down to the TK Automotive Repair experts.