In the end, you’re left with a broken-down transmission that’s only worth for its spares. Should you neglect its care, your gearbox will run into a host of issues. Only with a healthy formulation and flow of transmission fluid can your gearbox work right. This, among other reasons, is why you have to be aware of your transmission fluid color. It does a whole lot more too, but these are perhaps the most prevalent traits of gearbox oil. In a nutshell, we can summarise the functioning of the transmission fluid with two words – “cooling”, and “lubrication”. What Are The Different Types Of Transmission Fluid Out There?