Ways to Keep Your Transmission From Getting Too Hot

It is estimated that 90 percent of transmission failure is caused by overheating.

When a transmission gets too hot, it can cause major problems for your vehicle. The immediate effect is that the car may not run properly, but the bigger concern is the lasting harm that overheating can do, possibly even requiring the transmission to be replaced entirely. By taking steps to lower the transmission's operating temperature, you can safeguard your vehicle and avoid costly repairs down the road.

Try a Fluid Additive

A straightforward way to help your transmission stay cool and last longer is to regularly use a transmission fluid additive. These additives are formulated with special coolants that work to bring down the transmission's temperature, especially in situations where it is working hard, such as in stop-and-go traffic, on steep or uneven roads, or when the vehicle is carrying a heavy load. You can find transmission fluid additives at most auto supply stores. To get the best results, arrange for a licensed mechanic who knows about transmission repair and maintenance to inspect your vehicle's cooling system two times each year.

Shift Into Neutral

If you know you will be waiting in one spot for even a brief period, put the transmission in neutral and let the car idle. Letting the car idle in neutral while you are stopped at red lights, stuck in heavy traffic or waiting at railroad crossings takes pressure off the transmission and gives it a chance to cool down. This not only extends the life of your transmission but also, by letting the car idle in neutral when it is not immediately needed, reduces the amount of gas the engine uses, which saves you money over time.

Add an External Cooler

Transmissions that are used to tow other vehicles, auto parts, wood or tools tend to overheat more often because of the extra stress placed on the vehicle by the added weight, especially when driving over hilly terrain. Putting in an external cooler can be highly effective at lowering your transmission's temperature and keeping it within a stable range, which helps prevent damage. External coolers also help cut down on friction in the transmission, another frequent source of harm. You can buy external transmission coolers at most auto supply stores, and they usually do not need a professional mechanic to install them.