How to change your car’s transmission oil

August 11, 2020

Automatic transmission vehicles are incredibly popular because they are very easy to drive and require far less maintenance than manual transmissions. However, this doesn’t mean you can avoid regular automatic transmission servicing.

All vehicles need maintenance, and in the case of automatic transmissions, this means learning how to change the transmission oil. To help you out, we’ve put together this guide explaining what exactly transmission oil is, why you need to change it, and how to perform a transmission oil change.

Changing transmission oil yourself can save you money and prevent you from waiting for an appointment with a mechanic. However, it can be a messy and dirty job, so always contact a professional transmission specialist if you have any doubts.

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What is Transmission Oil?

Transmission oil, or transmission fluids, lubricate an automatic transmission so it can perform optimally. Your transmission fluid must be at its required level; otherwise, your transmission can experience significant wear and tear.

Over time, automatic transmission fluid can also become dirty or contaminated. Transmission oil performs a secondary purpose of catching impurities and debris that develop due to wear and tear. It can help prevent severe problems from occurring to your transmission due to unwanted waste entering the system.

Why Would You Need to Change Transmission Oil?

To ensure that you stay safe on the road and to prolong the life of your vehicle, automatic transmission fluid needs to be checked and changed on a regular basis. We recommend that you perform a transmission oil change every 50,000kms. This will help keep your vehicle running optimally and potentially saving you significant money on repairs in the long term.

Signs That You Might Need to Change Your Transmission Oil

Making Loud Grinding Noises: If you notice that your transmission makes strange grinding sounds, stop your vehicle and check your transmission fluid. If you see that your transmission oil is at a low level or that the colour of it is brown or black, replace it as soon as possible.
Slipping Gears: Dirty or low transmission oil can result in a lack of hydraulic power. To develop enough pressure to stay in the appropriate gear, a transmission must be clean. When a transmission is too dirty, contaminants can interfere, causing slipping.
Surging of the Vehicle: Have you noticed that your vehicle goes backwards for no good reason or suddenly jumps forward? Replacing your transmission fluid may help with this issue. However, if problems continue, we advise arranging an inspection with your local transmission expert.
Delay in Vehicle Movement: Another sign that your vehicle may need its transmission oil changed is a delay in vehicle movement for one or two seconds after being put in gear.
Problems Shifting Gears: A car requires clean transmission oil so it can flow easily through the transmission system. A transmission that contains too much debris will cause a sluggish response, resulting in your vehicle changing gears too quickly or too late while driving.
Unpleasant Burning Smell: If you happen to smell an unpleasant burning smell coming from your transmission, there’s a strong chance that the transmission oil needs to be changed. If you find that there is burnt fluid in your transmission, this means that there is an issue with the transmission itself. Contact your local transmission specialist today if you notice this in your vehicle.

Checklist of Materials Needed

To perform a transmission oil change, you will need:

The owner’s manual for your car
The right type and quantity of transmission oil
A means of raising your car, such as jack stands or ramps
A transmission filter kit – this usually contains a gasket for the oil pan along with a new transmission filter
A spanner set or socket set
A torque wrench
A large drain pan
Clean lint-free cloths
Plenty of rags to soak up the mess

changing transmission oil

How to Change Transmission Oil

1. Warm up the Transmission

You will be able to drain your transmission oil far easier if it is at operating temperature. Before you begin to change your transmission fluid, go for a short drive or run the engine for a few minutes to warm it up. If you choose to idle the car, make sure you run through all the gear options so the transmission fluid has a chance to circulate. Once completed, switch off your engine.

2. Raise the Vehicle

You need to get underneath your car, so you will have to raise it on ramps or jack stands. It must be level and fully secured in a stable position.

3. Check for Leaks

Once the vehicle is raised, you can visually inspect the transmission and transmission oil cooler for leaks. If there are, you will need to consult a transmission specialist who can fix it for you. If not, you can go ahead and perform the transmission oil change.

4. Locate the Drain Plug

On most automatic transmissions, you will be able to find the drain plug easily. On some vehicles, however, you will need to remove the fluid pan before draining the transmission fluid. Some vehicles might even require you to use a suction pump. It is essential to look at the owner’s manual to find out what the procedure should be for your vehicle.

Before removing the drain plug, you should place your large drain pan underneath the transmission to catch the old oil as it drains out.

Once you have found the drain plug, you can usually remove it using a spanner or socket, after removing any guards that may be around it. You need to be careful here as the transmission oil may be extremely hot.

5. Drain the Transmission Oil

Once the drain plug has been removed, the old transmission oil will start to drain into the drain pan. If your vehicle does not have a drain plug, you need to loosen your car’s oil pan instead – remove all but three of the bolts at one end, as this will allow the pan to tilt enough to drain the oil while still remaining in place.

Once all the transmission fluid is drained, you can remove the oil pan altogether, ensuring that all the transmission fluid is emptied into your drain pan.

6. Examine the Transmission Oil

Once all the oil has been drained, you need to examine the transmission oil and the fluid pan to check for any signs of metal debris. There is likely to be a small amount of debris in the old oil, but if you find any large particles of metal, this means damage has been caused to your transmission, so you need to have your car seen by a specialist.

Sometimes damage occurs if your car has been overfilled with transmission fluid, so it is extremely important to get the level right when changing transmission oil.

7. Remove the Old Gasket

The old gasket must be removed gently to avoid causing any damage to the surface. It is advisable not to use any sharp tools here.

8. Clean the Transmission Oil Pan

Before you can add new transmission oil, the oil pan needs to be thoroughly cleaned. Use a clean, lint-free rag to ensure all traces of old oil and debris are removed.

9. Replace the Transmission Filter

At this point, you will need to remove the transmission filter. If it is made of paper or cotton, you will need to change it. If your filter is metal, you can clean it with solvent and leave it to dry before using it again.

Before replacing or reinstalling your transmission filter, use a clean, dry lint-free cloth to wipe down the transmission and remove any old oil.

If you do need to replace your transmission filter, you need to make sure the new one is positioned in exactly the same place as the old one, and that all the bolts or clips which secure the filter to the transmission are reattached.

10. Install a New Gasket

Your vehicle manufacturer may specify a sealant to use when installing a new gasket. It is essential to check your manual to make sure you’re using the proper sealant.

Once the new gasket has been securely installed, you can reattach the oil pan, making sure you tighten all the bolts to the correct torque.

11. Reinstall the Drain Plug

Before reinstalling the drain plug, wipe it clean with a lint-free cloth. Then install it using a new washer and tighten it to the specified torque.

12. Refill With New Transmission Oil

Before refilling your transmission oil, you need to check that you are using the oil specified by the manufacturer. You should then slowly fill your system with fresh oil, making sure you leave time after each pump for the oil to flow in. Keep checking the dipstick as it is extremely important not to overfill. Once the oil reaches the “cold” level on the dipstick, you should stop.

13. Circulate the Oil

Once you have filled the transmission to the correct level, start your engine and move the transmission selector through all the gear options to allow the transmission fluid to circulate. Make sure you have your foot on the brake throughout.

14. Perform a Final Level Check

Select the correct gear for checking the level and then give it a final check. Make any necessary adjustments, then you’re done!

Contact the Transmission Experts Today!

Performing a transmission oil change will keep your car running more smoothly and prolong the lifespan of your transmission. However, it isn’t an easy job, so always consult a specialist if you don’t feel completely confident.

At Automatic Transmissions R Us, we are always happy to help you with all aspects of your automatic transmission, from manual and automatic transmission fluid change to manual and automatic transmission repairs.

Contact the Auto Trans team today by sending through an enquiry, emailing info@autotransrus.com.au or giving us a call on (08) 9240 5449!

      Excellent rating  
 Based on 280 reviews 
    
  
 
 
      I must say, I’m not one to often leave reviews, especially when it comes to services like this. However I was really pleasantly surprised with the service here. I’m quite new to the Perth area and had a whining issue with my 2010 rav4, so did some digging for transmission shops around the area, the review of this one definitely stood out and they didn’t disappoint! I went to the Toyota dealership to get the same issue looked at and they just took my 250$ and told me to completely change the Trans and Front diff and quoted me 20k. I came here for a second opinion. I got a call back from cam, who told me after looking at the car it is indeed noisy but it isn’t something that actually deteriorates the life of the car. He proceeded to tell me he has dealt with a lot of the callbacks for this exact model and problem. He told me if I could live with the noise and couldn’t afford a repair he’d recommend I just drive with it. He told me if you put the noisy piece next to one that isn’t noisy you wouldn’t even be able to tell the difference. I really really appreciated the transparency and honesty here, he didn’t try and upsell me or quote me an expensive repair, he just gave me the god honest truth (you can drive with it, if you want the noise gone only way to fix it is to replace it). If there is any other issues with my car at all I’ll be sure to come back here as I was truly impressed by the transparency and quality of service. Many many thanks to the team and especially cam! Bloody legend!
     
   Obey Summer 
 1 days ago
 
 
 
 
    The team at Automatic Transmissions R US were fantastic. Their service was excellent. Pam and the team made the process easy, especially as I was transporting my vehicle by courier. They were able to book my car in for as soon as I could get it delivered. The service team did great work inspecting and then completing the repairs. They kept in contact with any updates and were fast, reliable and reasonably priced.
Thank you Automatic Transmissions R US
     
   Michelle Te Aho-Woodbrook 
 9 days ago
 
 
 
 
    
     
   H S 
 48 days ago
 
 
 
 
    Came here to check my card transmission, very satisfied with the results and they give me good feed back that I need to do, luckily the transmission is no issue so, no charge for that, thanks very much for best service :)
     
   Faisal 
 55 days ago
 
 
 
 
    Ongoing issues with my car others couldn't fix, they sorted first visit, no issues since. Highly recommended 👍👍
     
   markymark9172 
 56 days ago
 
 
 
 
    Cameron and the team are the go to for transmission issues. I could not be happier with the service provided.
     
   Chris Parker 
 84 days ago
 
 
 
 
    I booked the vehicle in for a noise I thought was coming from the gearbox. Graham inspected the vehicle and found it was not a gearbox issue. Graham pointed out other possible faults that could result in the problem i was experiencing. I felt reassured and can highly recommend this repairer who didn't charge me for the diagnosis. Thanks to Cameron and the team at Automatic Transmission R Us a job well done.
     
   George Doneo 
 84 days ago
 
 
 
 
    Trailblazer/ Colorado TC shudder
Had to fight with Holden for many years for a repair for the TC shudder, offered a band aid fix from Holden that failed on two previous occasions.
The team at Transmissions R us were completely honest, as a mechanic in a previous life the explanation of the common problem made sense. (Phoenix Holden constantly denied this issue)
Had the  Transmission  repaired and drove like new, I literally drove the vehicle across Australia towing a boat. After 10 months noticed some slight leaking of ATF on the bell housing. The team repaired the leak that included removal of the Transmission without question.Highly recommend this business.
     
   Darren Ginnane 
 107 days ago
 
 
 
 
    Took my car in recently on short notice when I was informed of a auto trans issue from my normal mechanic. I was met with exceptional customer service and expertise which lead to a quick diagnosis to confirm my true issue which was a crappy ac compressor making the noise.

Will definitely be returning to these guys in the future for any auto trans work.
     
   luke sampson 
 116 days ago
 
 
 
 
    Was just booking in my car,great conversation very up front with the information I needed to know  very helpful
     
   James Taylor 
 119 days ago