Why choose the RAC for an automatic transmission fluid top-up?

At the RAC, we've got over 125 years' experience helping UK drivers. We have the skills and knowledge to keep your vehicle running. We'll give you results you can rely on at a price you can afford.

Close up of an RAC Mobile Mechanic underneath a car

Book an automatic transmission fluid replacement

To help make sure you’re getting smooth gear shifts and a long transmission life you need to maintain your automatic transmission fluid. So when you need to, make sure you have that old fluid drained and refilled at an RAC Approved Garage.

Any work done will meet the high standards set by the RAC.
We’re friendly, straightforward and jargon-free

Book a diagnostic

A mechanic will check your car for faults and talk you through any repairs you might need. There are various ways to check for faults, which could include a physical examination or plugging in to check your car’s onboard engine management system.

We’ll look for any mechanical or electrical problems. If we need to, we’ll also check your car’s onboard engine management system. Depending on your car and issue, this will usually include: – Engine – Power steering – Brakes – Transmission – Exhaust system – Fuel injection system – Cooling system and air flow – Sensors

And it’s not just automatic transmission fluid replacements that we do in Bristol

RAC Approved Garages offer MOTs and services. Our professional mechanics have the expertise and experience to make sure your vehicle is operating safely and efficiently – results you can rely on at a price you can afford.

Try one of our RAC Approved Garages

T.D Garage Services

4.5/5

At TD Garage Services Ltd, we take care of all car makes and models. Whether you have a Ford, a Fiat, a Honda or a Hyundai, you can trust us to do a quality job. We are well known as a reliable local garage that provides a range of services including car repairs, servicing as well as MOT testing.
Unit 20, Windmill Farm Business Centre, Bristol, BS34DB

PC Motors.

4.4/5

Established in 1980, our main workshop is located in the Horfield area of Bristol. We have a thirty year heritage of being Volkswagen Audi Group (VAG) specialists. As such we are highly experienced in the repair, parts replacement and servicing of the entire range of VAG makes and models. Our many years of expertise, working on these respected brands, makes us the leading independent specialists for VAG vehicles in the Bristol area. We are a fully certified RAC Approved Garage Network member and can also carry out any warranty work. Our team of trained, qualified, reliable and trustworthy technicians and mechanics have secured solid customer and key stakeholder relationships over our 30 year heritage. Confidence in our service quality, advice integrity and competitive pricing has resulted in a significant number of our customers staying loyal to us for over ten years.
Unit 1, Elm Road, Horfield, Bristol, BS78RJ

IN'n'OUT Autocentres Bristol

4.2/5

At IN’n’OUT Autocentres we offer fixed prices MOTs and Servicing for any make and model of car with no hidden extras. We are proud to be a ‘Which? Trusted Trader’ so we are really a garage you can trust. We also have a 5 Star Trustpilot reviews rating. We provide OEM parts and 12 months warranty on all parts and servicing. We only use premium Castrol oils in all servicing. Our services are all completed ‘while-u-wait’ so you have never have the inconvenience of losing your car for the day. You can watch your car as it is being worked on through the viewing window or sit back and relax in our clean and comfortable customer lounges with FREE Wi-Fi and coffee and read the latest magazines. Check out our latest reviews and BOOK NOW!!
In-N-Out Autocentres, Cribbs Causeway, Bristol, BS10 7UD

Bond Motor Services

4.2/5

Welcome to Bond Motor Services, a modern-thinking Motor Dealership and Repair Centre with a focus on traditional values and Service. We offer competitive Vehicle Servicing, Mechanical Repairs, Tyre Services and MOTs. Bond motor Services undertake the servicing and repair of all makes and models of cars and vans. Established for more than 15 years, proprietor expects nothing but the best from his team of qualified Technicians, and will ensure that both you and your car receive the very best of service. From your first contact you can expect friendly and open discussion about your vehicle and any work required, at an agreed and competitive price- This level of service and communication will continue, keeping you fully informed right up to the point when your vehicle is ready for collection.
50 The High Street, Kingswood, Bristol, BS15 4AJ

Westerleigh Car Centre Ltd

4.0/5

The company has been in business since 1989 in Westerleigh Bristol,and operating from the site for 15 years.We moved to Downend Bristol in 2004, purchasing our own premises offering a larger workshop and showroom for vehicle sales. The company offers high quality services on today modern vehicles. We have become one of the largest, and best equipped independent garages in Bristol.Our workshop offers 7 ramps including two MOT Bays for class seven,class five,and class 4 MOT Testing,MOT Tests are carried out on two ATL test lanes at our premises.We are able to carry out mot tests on cars and light commercials Vans up to 3500 kg,Camper Vans,Motor Homes up to 5000 KG. Mini Buses,4-4s,We also have a full alignment lift for all your Geometry requirements, and some of the best equipment available to the garage industry.We are PRO-CUTS premier garage for brake disc skimming in Bristol. We aim to provide top quality service and commitment to our customers, whether it be fleet or private vehicles, The garage is a member of the RMI and is a fully approved Trust my Garage member,The garage is a fully approved Delphi Diesel and Fuel injection specialist, We have invested in the latest Delphi Software and equipment.We are able to test Diesel pumps and Injectors for correct operation using our equipment.We are able to deal with pump repairs in house, or we can offer a Delphi Service exchange pump normally within 24 hours.We are also able to send your pump to Delphi for repair, if a service exchange unit is not available of the shelf,The company has been appointed a fully approved, Unipart Diesel and Fuel Injection specialist,We are able to deal with all makes and models of cars and light commercials.All work is guaranteed to be of the highest possible standard and comes with a 6 month or 6000 miles Labour Warranty. All parts carry a minimum 12 Months or 12000 miles Warranty. All Unipart parts fitted have a nationwide warranty through the network of Unipart Service Centres. We carry a range of quality used vehicles. All vehicles have a new mot (if less than six months remaining) and have three months warranty. Cars also have a full pre-delivery inspection before leaving the workshop.Opening times for workshops,Monday to Friday 8:00am to 5:30pm Saturday 8:00am to 12:00pm Opening times for Vehicle Sales Monday to Friday 8:00am to 5.30pm Saturday 8:00am to 4:00pm.
84 Downend Road, Downend, BS16 5UE

Frequently asked questions on automatic transmission fluid change

Automatic transmission fluid should be changed every 30,000 to 60,000 miles. However, always check your vehicle’s manual for the manufacturer’s recommendation. Your driving habits and the conditions you drive in will affect how quickly your fluid degrades. Regular checks and following the manufacturer’s guidelines will help to make sure your transmission stays in good condition.

Some people believe that changing old transmission fluid can cause issues, especially in high-mileage vehicles. This myth stems from the fact that when automatic transmission fluid is changed, the new fluid can sometimes dislodge debris, causing problems. However, this is usually due to debris build-up.

If you don’t change the automatic transmission fluid, it can become contaminated and lose its effectiveness, leading to transmission wear and potential failure. Over time, dirty automatic transmission fluid can cause increased friction, overheating, and significant transmission damage. Regular changes will help you avoid costly repairs and keep the transmission running smoothly.

Fresh automatic transmission fluid is bright red and clear. If your fluid looks clean and smells fresh, it’s been changed recently. You can also check the service records for confirmation. If in doubt, ask your mechanic to check.

Signs that you might need a transmission flush include:

  • Slipping gears: The transmission struggles to stay in gear.
  • Delayed gear engagement: There’s a noticeable delay when shifting gears.
  • Overheating: The transmission becomes excessively hot.
  • Unusual noises: Grinding or whining sounds from the transmission.
  • Dirty fluid: The automatic transmission fluid is dark or discoloured.

A flush can help remove contaminants and restore the fluid’s effectiveness.

It’s often best to have a professional do it. The process can be messy and requires proper disposal of old fluid. Professional services also include checks and diagnostics to ensure everything is working.

Transmission fluid is used in automatic transmissions, while gearbox oil is used in manual transmissions. They’re made to do different jobs, so they’re not interchangeable. Automatic transmission fluid is designed for the hydraulic and cooling needs of automatic transmissions, while gearbox oil provides the necessary lubrication for manual transmissions.

An automatic transmission flush is a service where all the old automatic transmission fluid is removed, and new fluid is added. It helps remove contaminants and old fluid that might be stuck in the transmission. It’s more thorough than a simple fluid change and can help restore the transmission’s performance.

Yes, changing the automatic transmission fluid is necessary to keep your vehicle’s transmission running well. Over time, the fluid degrades and becomes less effective, leading to potential transmission problems. Regular changes help the transmission run smoothly and can prevent costly repairs down the line.

To extend the life of your automatic transmission fluid:

  • Regular maintenance: Follow the manufacturer’s guidelines for fluid changes.
  • Avoid excessive heat: Don’t overload your vehicle or tow heavy loads when you don’t have to.
  • Check for leaks: Regularly inspect your vehicle for fluid leaks.
  • Smooth driving: Avoid aggressive driving habits that can overheat the transmission.

Proper care and regular upkeep can significantly extend the life of your automatic transmission fluid and transmission.

An automatic transmission fluid change will typically take about 1 to 2 hours, depending on the vehicle and the service provider. This includes draining the old fluid, replacing the filter (if necessary), and refilling with new fluid. If more services or diagnostics are needed, it could take longer.

If your transmission fluid is low:

  • Check for leaks: Look for any visible leaks under the car.
  • Top up the fluid: Use the right type of fluid for your vehicle.
  • Monitor the fluid level: Regularly check the fluid level to make sure it stays within the recommended range.
  • Consult a mechanic: If the fluid level continues to drop speak to a mechanic so that they can inspect and fix any issues.