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Discussion starter · #22 ·
Got under the car today to try and figure out the best way to remove the transmission fill plug after having some trouble last time. Although I didn’t actually remove the plug, I ended up using a 3/8‘s drive ratchet with an 8“ or longer extension and a 17mm shallow swivel socket. That ended up being the easiest way for me to reach the plug for future removal. I also tried touching the plug with my hand to see if I would be able to reinstall the plug by hand, but I couldn‘t quite reach it. I tried a snap-on ratcheting box end flex head wrench, but couldn’t get it to seat properly because of some metal protrusions around the fill plug. I was also able to reach the plug with a 3/8’s drive flex head ratchet and a 17mm low profile snap-on socket, but that was a bit more difficult and didn’t work as well as the extension and swivel socket. I also ended up turning the wheels both directions to see if that would allow more room, but that didn’t really help. Lastly, I tried reaching the plug from the drivers side wheel well. I turned the wheel completely to the right and was able to see the fill plug. I believe with a wobble extension and socket or extension with a swivel socket, you should be able to remove the plug if you remove the wheel to give you some room to work with.
 
My understanding for the DCT transmission fluid you should have it checked every 40k mileage depending on your driving conditions. It didn't even mention replacing in my owners manual other than having it checked and IMO that doesn't sounds all that good. It should be replaced probably around the 40K mark. I'm guessing it depends upon how hard we drive our cars.
 
I cracked open the 8mm hex fill bolt after attempting to do the proper fill hole. No way can I at my age do this with the fill and check hole. It's a tough bolt to turn but she came loose. I drained about 2 quarts out and same back in with redline . Mine is a 2018 Elantra GT Sport with DCT.
 
Hi guys - I have a 2019 Elantra GT N-Line with the DCT. I want to drain the OEM fluid and replace with Redline. On the Facebook forums it was recommended to replace both the fill and drain crush washers after the fluid change, however it was noted that they're different sizes. Do you guys have the part numbers handy for these (and the plugs too)? I believe the drain crush washer is part #21513? Not sure about the fill plug?
 
Hello,

This is a question to everyone here that posted from the past about changing the transmission fluid.
The main drain plug bolt off, has anyone else notice that it has a second leveling plug inside where the drain plug is located? Has anyone taken the driver side rim off and move the wheel well cover off to get into the fill plug? Our sealed DCT transmission is similar to the sealed transmission on a Toyota.

I don't have a hoist to properly lift the car and fully leveled, and my friend that has a garage gave me this link Sealed Transmission

I just want to help out with this community for research and such, hopefully this helps everyone in here and others searching for answers.
 
Discussion starter · #27 ·
Hello,

This is a question to everyone here that posted from the past about changing the transmission fluid.
The main drain plug bolt off, has anyone else notice that it has a second leveling plug inside where the drain plug is located? Has anyone taken the driver side rim off and move the wheel well cover off to get into the fill plug? Our sealed DCT transmission is similar to the sealed transmission on a Toyota.

I don't have a hoist to properly lift the car and fully leveled, and my friend that has a garage gave me this link Sealed Transmission

I just want to help out with this community for research and such, hopefully this helps everyone in here and others searching for answers.
not sure what you mean by a second leveling plug, but I usually put the front of the car on jack stands, loosen the fill plug, remove the drain plug and drain the fluid, lower the car, loosen the drivers side wheel, use a floor jack to raise the drivers side of the car up and remove the wheel and then lower the car slightly to get it level…you can measure the height from the floor to the floor jack lifting point prior to removing the wheel and lower it to that level once you remove the wheel to get the car level, but honestly I just drain the fluid and refill with 2 quarts of fluid and call it good.
 
Hello,

This is a question to everyone here that posted from the past about changing the transmission fluid.
The main drain plug bolt off, has anyone else notice that it has a second leveling plug inside where the drain plug is located? Has anyone taken the driver side rim off and move the wheel well cover off to get into the fill plug? Our sealed DCT transmission is similar to the sealed transmission on a Toyota.

I don't have a hoist to properly lift the car and fully leveled, and my friend that has a garage gave me this link Sealed Transmission

I just want to help out with this community for research and such, hopefully this helps everyone in here and others searching for answers.
It's not sealed. The 7-speed dry clutch DCT that Hyundai/Kia use in most of their 1.6L applications is basically an automated manual. The fill plug is on the front facing the radiator.

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