Check the Fluid Level Regularly
The fluid in an automatic transmission operates the clutches, provides cooling and lubrication and even drives the vehicle. So few things are more important than proper fluid operating level for keeping the transmission working.

Most automatic transmissions have a dipstick for checking the fluid level. If you’re not sure where yours is or how to check the transmission fluid level, refer to your owners manual, or go to your local repair center: They’ll be happy to show you.

Check Transmission Problems Promptly
Most transmission problems start out small. They get worse over time. Very often, you can eliminate major repairs simply by taking care of the problem early on.

Whether it’s a warning light on the dash, a few drops of fluid on the garage floor, or a change in the way the transmission operates, your best bet is to take your car in to your local repair center for service right away. In many cases you’ll be able to avoid a major repair simply by catching it while it’s a minor one.

Service Your Transmission Regularly
Transmission fluids have a number of unique properties that can wear out over time. And when they wear out, you can bet the transmission itself won’t be far behind.

One of the best ways to keep your transmission in good working order is to have it serviced annually. A complete fluid and filter change every year can add years to your transmission’s life, and in the end, save you money.

Add a Friction Modifier or Use Synthetic Fluid
New fluid can really help your transmission last longer. But there are a number of additives on the market that have demonstrated the ability to increase transmission life and reliability significantly, even beyond the extra miles you could expect from regular service.

In most cases, you won’t be able to find worthwhile additives in your supermarket or do-it-yourself parts stores: The really effective additives are only available to the professional transmission centers. Ask your local service repair center for recommendations.

Synthetic Transmission fluids can significantly increase the life of a transmission. They are more stable, transfer heat better and last longer between changes. In rough service conditions, such as towing, they are a wise choice.

Install a Cooler Line Filter
The #1 reason for transmission failure is heat. Transmission temperatures can quickly exceed 300°F. At that temperature, seals begin to harden, clutches begin to burn, and the fluid itself breaks down. To help eliminate excess heat from the automatic transmission fluid, have an auxiliary cooler installed. This is particularly important on vehicles that tow trailers, carry heavy loads or travel over rough or mountainous terrain.

Install an In-Line Cooler Line Filter
All automatic transmissions have some type of filter inside them. But these filters vary in effectiveness. Meanwhile, loose dirt and metal particles can quickly erode thrust washer and bushing surfaces, clog up passages, and reduce transmission life.

One of the best ways to eliminate these contaminants is to add an in-line filter to the transmission cooler lines. These filters are inexpensive and highly effective in removing damaging particles from the transmission fluid.

Service the Cooling Systems
You may not realize it, but your car’s cooling system does more than keep the engine running cool. It also cools the transmission fluid, through a heat exchanger built into the radiator tank.

So a faulty cooling system cannot only damage your engine: it can reduce transmission life as well. In fact, transmission damage may occur long before the engine over heats. To avoid both engine and transmission problems, keep your car’s cooling system clean and in tip-top condition.

Tune the Engine
The engines and transmissions in today’s cars are linked far more closely than in the past. A problem with engine performance can put much more strain on the transmission than one that’s running properly.

That’s another reason why it’s important to keep your car’s engine in good running order. A good running engine reduces the stress on your transmission, so the transmission can last longer without requiring major repairs.

Help the Transmission Shift
Virtually all transmission wear takes place during shifts; almost none occurs between the shifts. So one way to reduce transmission wear is to reduce the load during the shifts.
Pay attention to the speed when your transmission shifts normally. Then, just before the normal shift speed, learn to back off the gas just a bit. Easing off the gas will force the shift, while reducing the load on the clutches: a sure way to improve transmission life.