How to Drain Oil From Torque Converter // Mercedes
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- Опубликовано: 16 июл 2024
- How to Drain Oil From a Torque Converter on a Mercedes Auto Transmission DIY. Inc How to bring the Mercedes torque converter drain plug to the bottom so that you can drain oil from the torque converter & torque converter drain plug tightening torque.
The car featured in this video had the Mercedes 722.9 gearbox / Mercedes 7G tronic transmission.
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STILL Reading? Good for you! It means you want to do the job RIGHT! Here’s some more info for you…
The Mercedes 7G tronic gearbox / 722.9 transmission was introduced in 2003. Early cars DID NOT feature an accessible torque converter drain plug, meaning your Mercedes auto transmission service will be limited to about 5L because you won’t be able to drain oil from the torque converter. Not sure when this changed, but follow the video and look for the access port!
There is the possibility of two Mercedes torque converter drain plugs 8mm & 10mm. The torque converter plug tightening torques are 10nm and 15nm respectively.
If you can drain the oil from the torque converter on your Mercedes, you will get another 2L out.
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You’ll need a mini torque wrench like this one to do the job right:
👉 UK link: amzn.to/35SbJd5
👉 USA link: amzn.to/3m62X0d
It’s a good idea to replace the torque converter drain plug, the Mercedes Auto Transmission is sensitive to oil level!
Torque Converter Drain Plug (8mm) - A0019901117
👉 www.autodoc.co.uk/metzger/158...
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Affiliate links: This video and description contains affiliate links, which means that if you click on one of the product links, I may receive a small commission. I always try to link to parts and tools with the same criteria as I would if buying for myself, which is usually a balance of price, quality cost etc. In most cases (but not always, due to changing availability over time) the tools, parts etc are the exact ones that I used in the video.
DISCLAIMER - Please note that this video and its content is intended for information purposes only. Although every effort is made to ensure that all the information is correct, there is no guarantee that this is the case. This video should not be considered a substitute for seeking independent advice or the services of a professional. Any work that you carry out on your vehicle or vehicles in your care are at your own risk.
00:00 Dain oil from a torque converter Mercedes
01:00 Mercedes 722.9 Torque Converter Drain Plug
01:16 Mercedes Torque Converter Drain Plug
02:21 Mercedes crankshaft bolt location
02:33 Turn Mercedes Engine over by hand
03:13 How to drain oil from torque converter
03:37 Mercedes torque converter drain plug torque
#torqueconverter 
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🔥🔥For a FULL, In Depth, Step-by-step video (and I mean EVERTHING is covered!) on How-To Change the Transmission Fluid 🔥🔥---> ruclips.net/video/tda4zokL4Os/видео.html
Thanks for this video, just finished watching the transmission fluid change, but knew the torque converter had to be drained as well, greatly appreciate it. Gave me the confidence to do it myself, thanks again!
Hi @thisguy2114 Thanks so much! Take your time and you should be fine. 👍 Cheers, Phil
Thank you for the excellent tutorial. Subscribed. Cheers from Michigan.
Hi @williamwinn9160 Glad you liked the video! Nice to hear from someone from Michigan! 👍😀
I like you dude I followed after you were being honest with yourself at the end of the video
Thanks @tevincurry1521 I have to acknowledge the slight OCD that I have got about certain things (which others may not share!) 😂 I think in my more recent videos I try to give my opinion a little bit more too because there's a lot of info out there about about any job (and any thing!) and invariably you have to sift through it and decide how you are going to go about it. Anyway, thanks for subscribing, glad yo have you onboard! 👍 Thanks, Phil
Thanks for a good well detailed instructions!
You’re welcome! Glad you liked the video 👍😎
very useful video, thank you so much !
Thanks for your comments, much appreciated and glad you are finding the videos helpful 👍😎 Thanks, Phil
Brilliant Vid, very informative. Thank You.
Thanks very much! 🙏👍
If torque converter does not drain after removing drain plug, turn the torque convert either direction a few degrees it will help with letting air in and fluid out.
Good tip, thanks for sharing! 👍
Thanks alot big big help!
Great to hear, cheers!
And thanks a lot for tips!
No probs at all! 👍😎
Thank you
You're welcome! Thanks, Phil
2013 ML350 4Matic, tiny access port on bottom can't get to plug. But about 30 degrees to side another access port (rectangle) use this location to remove plug (with VIM half cut stubby bit on VIM HBR12 driver), then rotated torque converter back to bottom access port to drain. Cheers.
Oh wow, so it sounds like it is a little bit different then. Thanks for sharing the info, hopefully it will help others! 👍 Cheers, Phil
2013 GL450 4Matic same design. gotta another one in for service.
Nevermind, torque converter drain plug sits flsuh with hole, not like the last one where it was angled.
Great video, thank you
How do you fill it with oil or do you just fill the transmission
@denisvlora1 Yep, you just going through the transmission filling procedure and the torque converter fills back up during the running / priming sequence. If you haven't seen it, the refilling process starts here in another of my videos: ruclips.net/video/tda4zokL4Os/видео.html
Thanks for the video. how fo you fill ? with the torgue converter drained you’ll need to fill more than the pan holds?
Hi, what you need to do is start the engine (tranny will spin too) and this will refill the torque converter by taking fluid from the pan. Then, with the engine running, you top up the transmission pan from underneath through the drain plug. Finally, once the transmission is up to temperature, you drain off any excess fluid to achieve the correct fluid level. This video may interest you because it shows the full process. ruclips.net/video/tda4zokL4Os/видео.html Thanks, Phil
Thanks for this video, is it the same way for W205 C220 7speed to drain oil from Torque Converter?
Yes it is! But, bear in mind, some cars don't have a drain plug on the torque converter. I think yours will though given that it was probably made between 2014-2021 Thanks, Phil
@revivemyride can i do all this on a 722.6 trans? I have a drain plug on the torq. But can i also refill te torque converter like you did? Adding Extra oil and shift park-reverse-Neutral to fill it up?
Sorry for the slow reply. My understanding is Yes you can, the torque converter will refill automatically when you start shifting through the gears and then you just need to top up the fluid in the trasnmission and check the level. Cheers, Phil
This is freaking awesome. I am changing the fluid in my W5A330 trans right now. I have a question about the screw. Getting a new one will be hard. Can I replace with equivalent from a hardware store and use locktite?
Hi, thanks, glad you are liking the vid! if you don’t have a new drain plug to fit then you can use the original one, I have done this before with no issues. I think this might be a better option than getting a new one from the hardware store because there is a chance you might get the wrong thread size and damage the thread on the torque converter. To reuse the original drain plug, clean it up really well with brake cleaner, apply a drop of loctite to the thread. Clean the thread on the torque converter drain plug and refit the drain plug immediately, while it it clean and dry. Once you have refilled the tranny and primed it, you can inspect the drain plug to make sure it isn’t leaking (whilst keeping your fingers cross but it should work ok). Hope that helps and the rest of the job goes smoothly! Cheers, Phil
@@ReviveMyRide Blue Loctite?
Hi, yes, I used a blue loctite. I believe it is a medium strength one. There are actually lots and lots of different grades but you don’t want it too tight, so you can get it undone again next time 👍 cheers, Phil
Great Video, is there a video for transmission fluid change and torque converter drain of the GL500 X166 - 2014 model
Hi @muziqb if your car has the 7 speed automatic (7G-tronic) and I think it does, then this video should be what you need! Thanks, Phil
@@ReviveMyRide Thanks Phil, you are right. It is the same , I did the oil drainage and filter replaced yesterday, the workshop guy told me that there is no torque converter drainage plug, I am upset as I gave them 9 liters of oil, and they were able to drain only 6 , and filled back 6 liters, and the oil was dirty too, The remaining 3 liters stays in the TC , what should I do now ?
@@muziqb Hi, as mentioned a lot of the early cars didn't have torque converter drain plugs. For those cars, the procedure is for only 5-6L of fluid to be changed and I believe the service interval is around 50,000 miles. If you are happy the level check and adjustment has been done, it sounds like you are good to go! These transmissions are incredibly reliable, even with this "part" fluid change they will often run for at least 150,000 miles, maybe more! Thanks, Phil
@@ReviveMyRide lovely. Thanks for the detailed explanation.
@@muziqb no probs at all! 👍
Nice. What car lift do you have ? Can you make a video of the car lift
Hi, it’s called a HAMER. It is a hand operated (a jack on each corner of the lift) 4 post lift. I’m just checking with my contact to see if they are still for sale. I’ve been to do a video on it for a while! It’s on the list!
Hey there, when doing this service do we add all 9 liters to the pan at once then prime and check fluid level?
Hi, no, my personal view is that it is best to do it in stages. My advise is to refill with 5L if you haven't drained the torque converter, 7L if you have. Prime the system and then with the engine running, top up the tranny with the required amount (keep checking to see if it is running back out, when it starts to run back, do the temperature and level check). Bear in mind, 9L is the absolute maximum and in the vast majority of servicing (even by the main dealer), the full amount will never be drained, as they wouldn't disconnect and drain all of the various pipes etc. I have a video that shows the whole process: ruclips.net/video/tda4zokL4Os/видео.html Hope this helps!
QUESTION: Very informative video however I wouldn't have the know how to do it myself. I'm just not good with spanners!
My 2008 E320 CDi Sport is due an ATF change. I was speaking to a guy who uses one of those LAUNCH X-501 Auto Gearbox mega flush machines. He told me it drains the oil (including the torque converter), it then flushes the complete system and then refills with new oil along with some conditioner additive. He also said the flushing process cleans the existing filter and any build up in the pan and there is no need to replace it. Does that sound right?
Honestly, it doesn’t sound right to me but I don’t have any direct experience of using that sort of system. If the correct fluid is used, you don’t need conditioners etc. I would be really wary to ensure the correct fluid goes back in. Also, I can’t see any way that the existing filter can be as clean as a new one. Remember filters are designed to capture and hold particulates. Finally, the worst particles, metal shavings etc will all be in the bottom of the transmission pan, it’s really hard to clean this out without wiping it properly. My advice: get a price from a Mercedes dealer and maybe a good independent Mercedes specialist and compare it to the “Launch” method. There probably won’t be a huge difference in price and I think it would be better to use somewhere that is experienced with these cars and transmission. Hope that helps!
Same procedure for 5G-Tronic box mate? Or doesn't that one have a torque converter drain plug/inspection hole? Thanks very much indeed!
Hi, I’m told the procedure is very similar but haven’t done a 5G yet, so can’t confirm if there are any small changes but I think you will be ok. One thing on the 5G that people sometimes do is change the electrical fitting where it goes into the transmission. Again, really sorry, don’t know what is involved with this. Torque converter is pot luck, it always used to be there on the older transmissions then they delisted it on early 7G’s (when they thought they could be sealed for life, only to change their minds!) So, I think you will have a torque converter plug but if not, just change what fluid you can (this is usually about half the total quantity). Many of these trannys don’t get serviced at all, so you will still be doing your bit to look after it. Hope that helps! Thanks, Phil
Hello, can I ask you, if I want fill transmission fluid from top, not from drain plug (need another tool showned in next video). How is the process ?
Hi @grygarek you can't fill these transmissions from the top hence the complicated procedure to fill and level check from the bottom. I think Mercedes originally designed the transmission as "filled for life" but then realised later that it would indeed need servicing... Cheers, Phil
One question. When doing transmission oil change would I want to drain oil from torque converter first ? What is the purpose of running engionce you drained tq? To fill it up from transmission? Thx
Hi @adamsolowianiuk9462 I think most people drain the pan first but It doesn't doesn't really matter if you drain the pan first and then the torque converter or vice versa. You run the engine and step through the transmission gears / positions to prime the torque converter, the various pipes and internals etc. Then with everything primed and the engine / transmission still running, you top up and set the level. It's a little hard to explain but the overflow pipe in the pan allows you to set the level in the transmission pan but only if a certain amount of fluid is held in the transmission by it continuing to run and the system having been primed. Hope that helps! Thanks, Phil
I wanted to do my Chevy 4 x
A question, I have 2004 Mercedes E500 4matic 5.0L 5 speed 722.6 transmission. How do you drain out complete the transmission fluid out of the inside torque converter? I did look at the bell house hole to look for the drain plug on the torque converter and find nothing. I did drain out 7 quart of old transmission fluid. There is 2 quart more old transmission fluid was still inside of the torque converter.
Hi, Bryan, here is a comment from another viewer that explains how to do it: " if you don‘t have a drain plug in the torque converter you can still drain it. This is the method I use on my 5G 722.6 (2006) trans which pumps the old fluid out of the TC and cooler. Fill your transmission as you were, add an extra liter too. Now locate the two trans lines running into the radiator cooler from the transmission. One line will be running to a higher point on the side of the transmission, this is the return line. you will need flare wrenches to disconnect the line at the cooler. Once disconnect slip a short length piece of 5/8“ ID or 16mm rubber heater hose onto the connector at the cooler, add a hose clamp to keep it from slipping off. Hold a clear sided 3 liter container to catch the fluid. Before you start the car, You will be seeing dark fluid being pumped out at first then after about 2 liters is pumped out the fluid will turn bright red. Have someone start the car telling them you will yell when to shut off the car. If you have your wifey do this, tell her ahead of time that you are going to yell loudly to turn off the engine so see doesn‘t get excited or upset. Reconnect the return line and then top off the fluid level as you normally would." Hope that helps! Thanks, Phil
Is there an oil thermostat on the oil cooler loop? If so and to do a full oil change, how do you get the old oil out of that section and conversely do you have to take the oil temp up to normal temps before finalizing the oil level?
Hi, there is a temperature garage but I'm not sure where it is located. I know that it can be read with the right software during the transmission oil change. You don't normally change the oil in the oil cooler loop etc but it is possible to do so. Yes, the correct temperature is important before the level check. Here is an in depth video that should answer your questions! ruclips.net/video/tda4zokL4Os/видео.html Hope that helps! Thanks, Phil
@@ReviveMyRide found the answer elsewhere. It's only if the cooler is empty, say it's been replaced, then you run to 90 and allow to cool to 45 to release the overflow. This was from a MB worksheet.
@@captainbarnes923 Glad you found the info you needed! Thanks for sharing, might need that info in the future (hope not! 🤞) cheers, Phil
I have the 5 speed version. Is it the same for me? 02 e430 4matic.
HI, I haven't worked on a 5G before. I think there may be some differences compared to the 7G in the video. Not 100% sure but your car may have a dipstick (or the ability to add one) for checking the transmission fluid level. This would make things a lot easier. Also, not sure if the capacity of the transmission is the same... Sorry I can't be more help! I think I would be looking for a video on this specific tranny if I was you, I'm sure there will be one out there. Thanks, Phil
HI do you know if its the same for the jaguar stytpe
Sorry, I don’t but the Merc tranny service is a relatively unusual method, so I would hope that it is simpler on the Jag! Cheers, Phil
I have a 2022 sprinter RV with 12,000 miles. I have driven cross country in etgreme heat. I put 8,400 miles on the RV. I am thinking of changing ATF oil, I am looking at Amsoil or Ravenol. What brand of 236.15 ATF oil do you recommend???
Hi, in the video description I listed Fuchs Titan ATF 7134 FE, Shell ATF 134FE and Pentosin ATF 134FE but that's mainly because those are the ones I'm most familiar with. It doesn't mean that the two oils that you listed aren't good! Here is an interesting thread that may help you: (There is a list in the thread and they do mention the Ravenol but not the Amsoil). They seem to be promoting the Fuchs Titan (and that would be my personl 1st choice just becasue I have used it before with good results) but it does depend on where you live and what's available.
forums.mercedesclub.org.uk/index.php?threads/722-9-7g-fluid-spec.184414/ Thanks, Phil
What can I do if I didn’t put the car on neutral at the beginning, and now I have the valve body out? Can I put it on neutral like that?
Really sorry, if I'm being honest, I've no idea! I just put my car in park, did the tranny service and then the priming sequence etc, didn't mess with anything else... Sorry I can't help more! Thanks, Phil
Merhaba. Bir sorum olacak. Bu şanzımanın yağ pompası şanzıman içinde mi? Yoksa şanzıman dışında mı?
Merhaba, anladığım kadarıyla şanzımanın dahili bir pompası var. O zaman sadece Stop / Start arabalarında bir de yardımcı pompa bulunur. Umarım yardımcı olur! Teşekkürler, Phil
Hi, just a quick question, with regards to the extra oil for the TC, do we just add the extra 3litres (9 total) to the gearbox and it will automatically go into the TC? Thanks in advance!
Hi, yes, you just add it through the bottom drain plug hole into the pan and then when you prime the transmission the torque converter will refill itself. Always worth measuring how much fluid comes out when you drain it as a guide to how much to put back in because it is quite unusual to add the full 9L because usually you won’t have been able to get it all out (even when draining the torque converter). Cheers, Phil
@@ReviveMyRide what happens when we pull the pan and spill the shit everywhere 😅 just guess and send it?
@@hvguy The first time I did this job, I drained the pan and then removed the pan and there was lots of oil still in it! I was very tricky not to make a mess everywhere. I then learned that you can dislodge the the "over flow" pipe, which is located inside the pad just above the drain plug, basically knock it over with a screwdriver and that allows you wo fully drain the pan before removing it. That worked a lot better!
Hi there finally got around to draining my torque converter. I actually got 8L out between it and the trans pan. Sound right? Should I add back in 8 or 8.5L?
Hi @OGYELLOW 8L is a good amount to get out of your transmission, I think it only holds 9L in total! Yes, I usually like to put and extra 0.5L in compared to what came out. It makes it simple to drain off the excess during the level check and then you are good to go. Cheers, Phil
@@ReviveMyRide thank you!!
@@OGYELLOW No Probs! 👍
Why would there be any benefit to putting the car in neutral? Even if the transmission was in gear, with no oil pressure and at hand crank speeds I would not have expected any noticeable resistance on the crankshaft side of the torque converter.
There probably isn't and benefit but as I had to step past it anyway, I thought why not just leave it in that position for a few seconds, just like the other gears... Just a little bit of OCD on my part! Cheers, Phil
Hello, I own a Mercedes w212. I replaced the engine, but before I installed the transmission on the engine, I poured new oil into the torque converter nozzle, and I think I put a large amount, about one liter, in addition to what was inside. Zero I feel that the engine revs up a lot and the car has not started yet or it is taking off slowly. I face this problem only between the first and second gears, and the rear speed I feel the most. Is this because of the much oil that you added to the torque converter?
Hi @nooraldin380 The Mercedes transmission is very sensitive to fluid level and if you added an extra 1L, this is almost certainly the reason for the gear slipping that you describe. I have a full transmission service video here: ruclips.net/video/tda4zokL4Os/видео.html but I recommend is that you skip along to the fluid level check section at 18mins 52secs, get the transmission up to temperature and drain off the excess (all show in the video that I just linked to). Hope that helps! Thanks, Phil
@@ReviveMyRide thanks
The oil that came out appeared clean ??
What is the need to drain the torque convertor ? If/ when you change the transmission fluid does that not change the fluid in the torque con ??
Hi, the oil that was coming out of the torque converter wasn’t clean but it probably looked ok(ish) because I service the transmission regularly. There is about 2L of fluid in the torque converter, it doesn’t come out when you drain the pan, so if you don’t drain it, you end up doing a partial fluid change / service. Cheers, Phil
@@ReviveMyRide i will look at that when doing the transmission oil change, but it was done by previous owner at 45,000miles and car has only done 73,000 now, so another 20,000 at least !!
@@arnietwo11 Yep, as you say, a few miles to go before it is required. Sounds like your car was looked after very well by the previous owner!
Does m111 engine has something like this
Hi, to be sure, you will need to check out which tranny your car is running. Do a little bit of searching on wikipedia for example, maybe it's a C class W208? You can check to see what tranny's were fitted. Here's an example: en.wikipedia.org/wiki/Mercedes-Benz_CLK-Class#Transmission Sounds like yours is an earlier car and may be running the 5 speed auto (5G-tronic)? If so, you probably do have a torque converter drain plug in the same position. Thanks, Phil
And now how to put it back in the new one?lol same way as transmission fluid??
The torque converter will refill when you run the tranny, so you don’t have to try to refill it through the little drain plug. Although, you will need to level check the transmission and add more if required. Cheers, Phil
@@ReviveMyRide thanks a lot once again !!
@@ReviveMyRide you awesome 😎
Mercedes-Benz DOES NOT recommend draining the torque converter. 40k miles drain and fill. I personally like loosening the valve body to drain even more fluid. Should have 6 to 8 liters on hand just in case. I love working on my car. Transmission fluid can be tough on the kidneys, so take precautions.
Hi, Thanks for the comment! I wasn't aware about the potential issues with kidneys, I'll be even more careful not to get it on my skin! Lots of people ask all of the time about draining the torque converter (hence the video). I think, even if not recommended by MB, then people are used to doing it either on these cars or others. The drain and refill of the torque converter went really smoothly and it reprimed quickly with no issues. Also from memory, you get just over another liter out, so on balance, I think it is worth doing. Cheers, Phil
7G blue fluid not red
Hi, thanks for your comment! There is a lot of confusion out there regarding fluid types for this gearbox. The majority of 7G tronic / 722.9 transmissions take the red fluid (early cars from around 2003 onwards). Then, around 2010, with the introduction of stop / start technology, Mercedes change the fluid to blue. It's best to stick to the fluid type / colour that your car had in it originally. There is a great write up by FCP Euro here if you would like more information! blog.fcpeuro.com/mercedes-7-speed-transmission-service-walkthrough-722.9-transmissions Thanks, Phil
@@ReviveMyRide thank you for your reply
I have c class w204 c220 2012
I did service B with specialist MB
after two months I checked transmission fluid in MB centre they told me wrong fluid my fluid red, must be Blue, I changed to blue,
Is any damage now on my transmission
My car start stop
Thank you from Plymouth
@@kassem2950 I don’t think there is a risk of damage to your transmission. These transmissions are very robust. It is probably more of a performance thing: transmission starting back up in drive ready to go more quickly, fluid more resistant to shear and breaking down. Maybe on the wrong fluid, your gear changes may have become more clunky over time. The blue will be better suited to the stop start requirement. Don’t worry!
@@AroundTuit thank you so much
@@kassem2950 Sorry, replied with the wrong account above! lol! Anyway, no probs, happy to help!
😻 promosm