Long term reliability of HTRAC AWD transfer case due to inability to change the transfer case fluid?

[Acpantera]

remove the triangular bracket, 17mm socket for the three, 14mm socket for the two lower.once thats off, remove the plug with a 14mm allen.fish the tube in as deep as possible, I got out just shy of 450ml.Very EZ job, test drove and was extremely happy that my jerky acceleration disappeared. The manual says it takes 670ml and i replaced less than 500ml. Im going to be changing the engine oil in about 500 miles, so i think im going to repeat the process just for the halibut.
So, don't any one tell ya that the transfer case oil can't be changed in a G80 sport with HTRAC.

 

[Acpantera]

Thats what the old stuff looked like, new stuff looks like new power steering fluid. No strange smell of the old, just looks like and poured like burnt tranny fluid. New stuff poured like trans fluid.

 

[Husky]

How many miles on that fluid?

 

[Acpantera]

How many miles on that fluid?

19,500 miles

 

[Aquineas]

On a tangent, please note that's the newer, crappy Pyrex. Not that you were planning to find out, but it's not heat-resistant like the old stuff.

 

[Acpantera]

On a tangent, please note that's the newer, crappy Pyrex. Not that you were planning to find out, but it's not heat-resistant like the old stuff.

Told the wife that one of the kids must have taken that crappy cup when they moved out.

 

[ThoughtfulOne]

One hyundai Technician just sent to me some pictures of the 2015 G80 workshop manual, and they explain how to change the oil (they even give the reference of the Oil type : Shell TF0870, same TF found in the BMW and Porsche Transfer case) so yes it is possible to change the Transfer case oil.
They recommend to take the case off the vehicle to proceed to the oil change, but maybe it is doable while the case attached to the kinematic chain.

Is there any way you could share that resource with the rest of us?

I'd be interested to compare the images the Hyundai tech has with the ones that Acpantera here has shared. I'm guessing they will be very similar.

 

[M_T_W]

Just recently purchased a new 2020 g70 sport with 40 miles.. currently sitting at 1,300 miles. From day one there was that clunky 4wd feel when turning at low speeds.. (originally took car in for the dark chrome issue referenced in other threads..) mentioned to dealership who assumed it was a pressure sensor. Well just got the call that they think the transfer case is bad, and they are ordering a new one.

 

[rahjelli]

so update on my car... original dealer did nothing for me, so I scheduled an appointment at a local dealer which the soonest date which was weeks out. So dropped the car off on 10/8 with the same issue of low speed knocking, dark chrome fading and most importantly the AWD dash light... they still have my car 2 weeks later, but they did order the transfer case assembly and will replace it. So it's taken since July 3rd to get SOMEWHERE with Genesis and I'm not happy the service takes so long to schedule and then so long to work with getting the problem fixed once it's been identified. But at least it seems it'll FINALLY now be fixed, but still without my car.

 

[Slip_Angle]

Sorry to hear you've had such a bad time with the dealer. That's crazy to wait so long! Make sure you do a Google review on the first dealer. Maybe that will get some more attention.

Hope this gets wrapped up for you soon!

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[millemk]

View attachment 32527remove the triangular bracket, 17mm socket for the three, 14mm socket for the two lower.View attachment 32528once thats off, remove the plug with a 14mm allen.View attachment 32529fish the tube in as deep as possible, I got out just shy of 450ml.View attachment 32530Very EZ job, test drove and was extremely happy that my jerky acceleration disappeared. The manual says it takes 670ml and i replaced less than 500ml. Im going to be changing the engine oil in about 500 miles, so i think im going to repeat the process just for the halibut.
So, don't any one tell ya that the transfer case oil can't be changed in a G80 sport with HTRAC.

Thanks, looks easy to drain from your pics. But, for refilling, where is the fill port??

 

[Acpantera]

Thanks, looks easy to drain from your pics. But, for refilling, where is the fill port??

There is no drain, I used a syringe and a foot long tube to suction out as much fluid possible from the fill port. I also used the syringe to replenish the fluid.
I did the process once, had great results in eliminating the jerky acceleration I was experiencing. 500 miles later I repeated the process again just for peace of mind. All in all I used just under one litre of fluid, glad I did it.

 

[OneLonelyPlayah]

I did this fluid swap over the weekend.

What's interesting is a key difference between Acpantera's underside and my own. I have a 2018 G80 V-8 AWD. In Acpantera's picture, his car has a stamped metal cross brace supporting the transfer case and holding the plastic cover.

On mine (sorry-I forgot to take a picture of that), I have a massive cast aluminum girdle that supports the transfer case. It is held in place by three large metric bolts threading directly into the unibody, and it then attaches to the transfer case via a large rubber dampener and aluminum bracket that bolts to the holes holding Acpantera's black plastic cover.

Between changing the fluid in that, as well as doing the transmission fluid and filter (really, the pan as the filter integrates into the plastic pan, I was in the garage for 5 hours. I had to support the transfer case via a floor jack in order to remove the aluminum girdle (the aluminum piece also provides support for the rear of the transmission, from the looks of it).

The factory manual came in really handy with the torque specs, etc and my fluid looks similar in color to what Acpantera removed from his. With both fluid changes done, it shifts buttery smooth.

Not the most fun I've had on my back, but not too bad overall. Just a lot of time for something I can do on my Honda in under an hour, including clean up and selecting the appropriate Top Gear to watch while working.

Here is the tool I crafted for fluid removal.

 

[SER]

Just recently purchased a new 2020 g70 sport with 40 miles.. currently sitting at 1,300 miles. From day one there was that clunky 4wd feel when turning at low speeds.. (originally took car in for the dark chrome issue referenced in other threads..) mentioned to dealership who assumed it was a pressure sensor. Well just got the call that they think the transfer case is bad, and they are ordering a new one.

Hello M_T_W, quick question, seems like you described an issue i am experiencing right now with my 15 Genesis AWD. While turning the wheel all the way to the left or right and starting driving on the low speed ahead or even worse backwards, it feels like the car stutters. Like wheels getting blocked from going freely. When the wheel is straight it drives absolutely fine. However i have no codes on the dash, but do have this issue. Were you able to figure out was was the issue? Transfer case? Please advise

 

[SER]

Just recently purchased a new 2020 g70 sport with 40 miles.. currently sitting at 1,300 miles. From day one there was that clunky 4wd feel when turning at low speeds.. (originally took car in for the dark chrome issue referenced in other threads..) mentioned to dealership who assumed it was a pressure sensor. Well just got the call that they think the transfer case is bad, and they are ordering a new one.

Hello M_T_W, quick question, seems like you described an issue i am experiencing right now with my 15 Genesis AWD. While turning the wheel all the way to the left or right and starting driving on the low speed ahead or even worse backwards, it feels like the car stutters. Like wheels getting blocked from going freely. When the wheel is straight it drives absolutely fine. However i have no codes on the dash, but do have this issue. Were you able to figure out was was the issue? Transfer case? Please advise

 

[SER]

so update on my car... original dealer did nothing for me, so I scheduled an appointment at a local dealer which the soonest date which was weeks out. So dropped the car off on 10/8 with the same issue of low speed knocking, dark chrome fading and most importantly the AWD dash light... they still have my car 2 weeks later, but they did order the transfer case assembly and will replace it. So it's taken since July 3rd to get SOMEWHERE with Genesis and I'm not happy the service takes so long to schedule and then so long to work with getting the problem fixed once it's been identified. But at least it seems it'll FINALLY now be fixed, but still without my car.

Hello Rahjelli, quick question, seems like you described an issue i am experiencing right now with my 15 Genesis AWD. While turning the wheel all the way to the left or right and starting driving on the low speed ahead or even worse backwards, it feels like the car stutters. Like wheels getting blocked from going freely. When the wheel is straight it drives absolutely fine. However i have no codes on the dash, but do have this issue. Were you able to figure out was was the issue? Transfer case? Please advise

 

[bubbaG80Sport]

Thanks all for the information. I am considering doing a transfer case fluid replacement on my 2018 G80 Sport 3.3T AWD.

At 40K miles (now at 48K) I started getting a shudder/slip under moderate acceleration from 20 -> 50mph. It only occurs after car is at operating temperature and most common on hot days (~90F). I took to dealer and rode with tech. They said it is was normal, unique to the Gennys tranny. I rolled my eyes and said B.S. in my head.

@Acpantera
Q1) What year is your G80 Sport AWD?

Q2) What was the viscosity of the DTF fluid you used?
I want to ensure I get the correct fluid. Owners manual says classification SHELL TF0870 B with volume/capacity of 0.65 US qt.

Q3) How many under-side body panels did you have to remove to get to the transfer case drain/fill plug?

I see the Ravenol DTF fluid you used is TF-0870. Their website says "Genesis (USA) G90 3.3 T-GDI and 5.0 GDI AWD (from year 2016);". The G90 3.3T engine is same as the 2018 G80 2018 3.3T engine. I am ASSUMING the transfer case fluid is the same.

 

[Acpantera]

Thanks all for the information. I am considering doing a transfer case fluid replacement on my 2018 G80 Sport 3.3T AWD.

At 40K miles (now at 48K) I started getting a shudder/slip under moderate acceleration from 20 -> 50mph. It only occurs after car is at operating temperature and most common on hot days (~90F). I took to dealer and rode with tech. They said it is was normal, unique to the Gennys tranny. I rolled my eyes and said B.S. in my head.

@Acpantera
Q1) What year is your G80 Sport AWD?

Q2) What was the viscosity of the DTF fluid you used?
I want to ensure I get the correct fluid. Owners manual says classification SHELL TF0870 B with volume/capacity of 0.65 US qt.

Q3) How many under-side body panels did you have to remove to get to the transfer case drain/fill plug?

I see the Ravenol DTF fluid you used is TF-0870. Their website says "Genesis (USA) G90 3.3 T-GDI and 5.0 GDI AWD (from year 2016);". The G90 3.3T engine is same as the 2018 G80 2018 3.3T engine. I am ASSUMING the transfer case fluid is the same.

Hey Bubba, I had a 2018 G80 sport, and after alot of research I found that the transfer case in the Genny was the same unit as the one most commonly used in BMW cars. I could not find the shell product that was listed in the owners manual so that took me to the Ravenol that I got on Amazon(the label said approved for Genesis/Hyundai cases).
I don't remember taking any underbody panels off, all I took off was the rear tranny mount, that's the black triangular metal piece that bolts to the transfer case with 3 bolts and 2 bolts that secure that piece to the cross member.....nothing moved. I had the car on ramps so that the fluid stayed to the back of the unit. I managed to get nearly a 1/2 liter out and back in, the car was instantly perfectly smooth again. I drove the car for about a week and repeated the process for the heck of it just to get the fluid as clean as possible. Well worth the effort imo.

 

[bubbaG80Sport]

Hey Bubba, I had a 2018 G80 sport, and after alot of research I found that the transfer case in the Genny was the same unit as the one most commonly used in BMW cars. I could not find the shell product that was listed in the owners manual so that took me to the Ravenol that I got on Amazon(the label said approved for Genesis/Hyundai cases).
I don't remember taking any underbody panels off, all I took off was the rear tranny mount, that's the black triangular metal piece that bolts to the transfer case with 3 bolts and 2 bolts that secure that piece to the cross member.....nothing moved. I had the car on ramps so that the fluid stayed to the back of the unit. I managed to get nearly a 1/2 liter out and back in, the car was instantly perfectly smooth again. I drove the car for about a week and repeated the process for the heck of it just to get the fluid as clean as possible. Well worth the effort imo.

Thanks. A quick search for "SHELL TF0870" did return a non Ravenol fluid indicating it was for "Beemer" transfer cases.

My biggest concern is getting to the drain plug. I've used a floor jack and jack stands for other work which is not suitable/safe for jacking up the whole front end IMO. Also, I'd want to lift front end versus from the side to get as much of the TC fluid out as possible. It's time for me to get some ramps.

I've put this on my to do list during my week off Christmas this year.

 

[Acpantera]

No drain plug.....just a fill plug....thank you silly engineers. The plug is ez to get at, just 5 bolts to remove the rear mount to get at it. I used a 60ml syringe to swap the fluid.