Transmission Fluid Change Service in San Antonio, TX

Auto Service Experts Transmission Shop

Transmission service is the number one way to prevent premature failure! Transmissions are the most essential, complex component of an automobile’s engine. They are responsible for transferring power from the vehicle’s engine to its wheels. The transmission’s function is vital to the engine, so timely service is a necessity, not an option. Your car can’t run without it! If you neglect to have your transmission serviced for long enough, you will be looking for a trustworthy transmission shop near you to repair or rebuild it.


Transmission Service Fluid Drain Replacement on Jeep

Transmission Fluid Replacement on Jeep


Why Change Transmission Fluid Regularly?

Transmissions take a lot of wear and tear under normal operating conditions, but this can be worsened by lack of proper auto maintenance. Transmission fluid maintains the hydraulic pressure necessary for operation. It also lubricates and cleans the moving inner components and reduces heat and friction. Dirty fluid can cause many problems such as slipping, difficult shifting, or sticking in neutral, and also decreases your car’s fuel economy. Simply having the fluid changed at recommended intervals can prevent many of these problems, reduce the chance that you will require major repair, and effectively increase the lifetime of your auto transmission.


Transmission fluid contains special detergents and anti-corrosive lubricants which deteriorate over time. As the fluid breaks down and provides less lubrication and protection, components begin to wear against one another causing metal shavings and component particles to break off. These contaminants are then carried through the system creating clogs which can block certain parts of the transmission from receiving adequate lubrication and prevent the gears from shifting properly. Moving parts can no longer operate freely, and this eventually leads to damaged components or transmission failure. Lack of proper maintenance is the most common reason for a vehicle to require a complete transmission overhaul or other major repairs.


Transmission Service Fluid Changes Prevent Failure

This Transmission was rebuilt due to damage which could have been prevented with proper maintenance.


Changing the fluid regularly can greatly extend the life and improve the performance of your automobile's transmission. Our service is designed to keep your vehicle running smoothly while reducing the chance of major transmission repairs down the road.


Ask one of our ASE certified mechanics about our discount transmission service coupon!


Automatic Transmission Service

Automatic transmissions (AT) are hydraulically operated systems. This means that their operation depends on AT fluid which travels through tiny passageways and places pressure on bands in order to shift gears. AT fluid also lubricates, cleans, and cools the inside of the system.


Transmission service replaces the old, contaminated, and worn fluid with fresh fluid. This helps to clear clogged passageways and restores adequate protection for moving internal components. It also replaces the clogged filter with a new one to help maintain the condition of the new fluid. Following the factory maintenance schedule for your vehicle is the most important step you can take to preserve transmission performance and lifetime. Failure to maintain the proper transmission fluid change schedule is the leading cause of problems which require major repair, or complete transmission overhauls to fix.


Automatic Transmission Service Includes:

Removing pan
Cleaning pan and checking for leaks
Replacing filter/cleaning screen
Replacing pan gasket
Reinstalling pan
Draining fluid and refilling it to the proper level with new, high-quality transmission fluid according to vehicle-specific manufacturer recommendations.
*Transmission service does not replace all the transmission fluid, as some remains trapped within the working components such as the torque converter, and cooler lines.


Note: On front wheel drive vehicles, transmission service includes differential service. In these vehicles, the differential is part of the transaxle so there is no need to schedule a differential fluid change service separately. However, in rear wheel drive, all wheel drive, and four wheel drive trucks and cars, differential service should be performed according to the schedule in your owner's manual. On many makes and models, the intervals between differential service are quite long, so it can be easy to overlook. Auto differentials are designed to carry a heavy workload, and should last you a very long time. Lack of maintenance can cause irreversible damage. Differential service prevents repairs or replacements which could have easily been avoided.


Manual Transmission Service

Manual transmissions (MT) are not as complex as automatics but are just as important to properly maintain. While standard transmissions are not hydraulic systems, they still require fluid to lubricate, clean, and protect internal system components. MT fluid contains specialized detergents, lubricants, and anti-corrosive additives which wear out with normal use. MT service drains old, worn fluid and replaces it with fresh fluid which is able to properly clean & protect the moving components. Standards are not equipped with fluid filters. Different MTs require different fluids (such as heavy gear oil, automatic transmission fluid, or motor oil) so it is important to follow manufacturer recommendations. This will reduce the possibility of having to have your standard transmission repaired due to lack of maintenance.


Transmissions and Fuel Economy

The condition of your transmission and how well it operates affects fuel economy. Different sized gears ensure that the engine’s power is used as efficiently as possible at different travel speeds and under differing driving conditions such as climbing inclines and traveling downhill. Engines have an ideal speed zone referred to as the power band. The more gears a transmission has, the better it is at keeping engine speed within the power band zone under different operating conditions. This allows for faster acceleration, hill climbing, more efficient towing, and higher max speeds while maintaining the best possible fuel economy. Modern automatic transmissions (AT) are becoming increasingly complex. 5 speeds and 6 speeds are most common, while many others have up to 8 speeds. As the number of gears increases so does the complexity of the design. With more moving parts to protect, transmission service is more important than ever.


Transmission Service Recommendations:

Many common problems can be avoided by having your fluid changed routinely and having a certified ASE mechanic perform a thorough transmission inspection at recommended intervals. Different makes and models of cars and trucks require transmission service at different intervals, so it is important to follow the manufacturer’s maintenance schedule. You can find this information by consulting your vehicle’s owner manual or asking an Auto Service Experts specialist. For more transmission maintenance tips to improve performance, visit our Blog!


Also, see our San Antonio Transmission Repair Blog for tips on preventing common causes of transmission failure.


Manufacturer RecommendedTransmission Fluids

Always use the proper transmission fluid for your vehicle. Manual transmissions require a different type of fluid than ATs or CVTs. Likewise, different makes and models have very different specifications, and using the wrong one can cause major problems!


Transmission Fluid Change Schedules:

Transmission fluid change is typically required every 2 years or 24,000 miles. It may be necessary to drain and replace your fluid more often if it becomes contaminated, discolored, or low. Contaminated fluid causes the transmission to work harder than necessary, have shifting or slipping problems, or even overheat.


Keep in mind that the life of the fluid decreases as it is exposed to extremely high temperatures (over 175 degrees Fahrenheit). Harsh driving conditions such as inclement weather, hauling heavy loads, or driving in mountainous terrain can place more strain on the transmission which causes internal temperatures to rise, and fluid to deteriorate faster. Under these conditions, you should have your fluid checked and possibly replaced more often. If you have questions regarding the proper service schedule for your particular vehicle and driving habits, feel free to call and speak with one of our ASE certified transmission mechanics - we are always happy to help.


Proper Fluid Level

It is a good idea to have your transmission fluid level checked periodically, between regular service intervals. Low fluid may alert you to the presence of a leak. If caught early on, leaks can be repaired before the fluid becomes dangerously low and causes major transmission damage. 


It is also important to avoid overfilling. In most cases, over filled transmission fluid will not cause damage. Excess fluid is usually pushed out through the vents, creating a big (and smelly) mess. In cases of extreme over filling, however, fluid may reach the clutches and cause them to malfunction. Internal gears are designed to operate above the fluid level. Too much fluid splashes around creating air bubbles, foam, and excessively high pressure inside the gearbox. This pressure can cause seals and components to break. It can also push internal components out of alignment causing them to grind against one another and creating additional heat and friction. High temperatures decrease the lifetime and effectiveness of the fluid, which means moving components are not adequately lubricated and protected. In extreme cases, these conditions lead to oil starvation, transmission overheating, and possibly failure.


Keeping up with regular maintenance, and noticing minor issues before they become a major repair can save you a great deal of time and money. Pay attention to any problem warning signs such as transmission fluid leaking in the driveway, and bring your car to Auto Service Experts Transmission Repair Shop for a FREE check as soon as you notice any problem.

Transmission Service & Fluid Change

Your transmission works harder under strenuous driving conditions such as towing, hauling extra weight, driving in mountainous terrain or on dirt roads, stop and go driving, and extremely hot or cold temperatures. When the transmission operates in low gears for extended time periods, the internal temperature rises. This makes it even more important to maintain fluid at the proper level and condition in order to properly cool the system and protect components from wearing against one another.

ASE master technician Carlos Rodriguez

(210) 495-6688
Auto Service Experts

13050 San Pedro Ave. San Antonio, TX 78216

Mon-Fri 8:00am - 6:00pm