2015 3.8rwd 5th gear to 6th gear slippage

[koovoodoo]

Hello, I recently got the 2015 3.8 rwd 102k miles and was able to change the transmission oil. I had planned on changing the oil first, then wait for the pan with filter to come (ordered already). After changing the oil (max life ATP which is rate for the sp-iv rr spec) , there is a slippage from 5th to 6th gear. When changing gear it would rev up then down then ultimately get into 6th gear. I drive faster than change to 6 then immediately 7th to bypass but obviously not ideal.

I've been reading thru the other pages about the TSB and also some YouTube videos about changing the solenoid valve. Based on the TSB I'm not quite sure which part number to get? I don't have any codes on my vehicle and reading thru other post some people state there might not be any codes?

Also would you guys recommend changing multiple solenoids? I it might be costly but if I'm going to have it disassembled, I figured might as well change if it decreases risk and I plan on keeping the vehicle for a while. Thank you

 

[Husam]

First of all, after changing the ATF, you'll need to reset the transmission adaptive values using a 2-way OBD scanner. Then drive your car with gentle acceleration from 1st gear to 8th gear then stop slowly, repeat 5 times. Then switch off the car and repeat one more time.

If the issue persists, then you can look into mechanical problems such as a solenoid or valve body assembly.

Good Luck

 

[carguy75]

Hello, I recently got the 2015 3.8 rwd 102k miles and was able to change the transmission oil. I had planned on changing the oil first, then wait for the pan with filter to come (ordered already). After changing the oil (max life ATP which is rate for the sp-iv rr spec) , there is a slippage from 5th to 6th gear. When changing gear it would rev up then down then ultimately get into 6th gear. I drive faster than change to 6 then immediately 7th to bypass but obviously not ideal.

I've been reading thru the other pages about the TSB and also some YouTube videos about changing the solenoid valve. Based on the TSB I'm not quite sure which part number to get? I don't have any codes on my vehicle and reading thru other post some people state there might not be any codes?

Also would you guys recommend changing multiple solenoids? I it might be costly but if I'm going to have it disassembled, I figured might as well change if it decreases risk and I plan on keeping the vehicle for a while. Thank you

How much fluid did you use when you changed the transmission fluid and filter? It sounds like you may not have correctly refilled the transmission.

 

[carguy75]

First of all, after changing the ATF, you'll need to reset the transmission adaptive values using a 2-way OBD scanner. Then drive your car with gentle acceleration from 1st gear to 8th gear then stop slowly, repeat 5 times. Then switch off the car and repeat one more time.

If the issue persists, then you can look into mechanical problems such as a solenoid or valve body assembly.

Good Luck

Generally, you do not have to reset the transmission adaptive values unless you have performed internal work(rebuild) or replaced a transmission I believe. The clutches and other internals in the OP transmission is still worn out with over 100k miles of use; so an adaptive value reset should not be performed in my opinion just for a fluid change and filter change. The adaptive valve feature allows the transmission TCM to adjust to worn clutches for proper shifting as the transmission clutches wear down over time and only reset when new clutches or new transmission is installed.

I am leaning more to a fluid level issue to be the cause of the problem. However, it could turn into a mechanical problem if the OP does not correct the fluid level.

Here is an older video that explain transmission adaptive value reset

 

[Husam]

Generally, you do not have to reset the transmission adaptive values unless you have performed internal work(rebuild) or replaced a transmission I believe. The clutches and other internals in the OP transmission is still worn out with over 100k miles of use; so an adaptive value reset should not be performed in my opinion just for a fluid change and filter change. The adaptive valve feature allows the transmission TCM to adjust to worn clutches for proper shifting as the transmission clutches wear down over time and only reset when new clutches or new transmission is installed.

I am leaning more to a fluid level issue to be the cause of the problem. However, it could turn into a mechanical problem if the OP does not correct the fluid level.

Here is an older video that explain transmission adaptive value reset

If the fluid level is OK and you still have the symptoms, a reset may be necessary. The new fluid has different characteristics from the old fluid and the TCM has different pressure values in my opinion.

 

[koovoodoo]

Thank you to everyone above.

I actually changed my fluids a total of 3 times. First time same problem then next day I took to friends shop as they had the lift. Same problem was observed. Last time (yesterday) I did it at home.

All 3 times I made sure to be properly leveled. Made sure to go thru gears and adequate temperature before checking overflow valve with a steady stream coming out.

I haven’t tried the reset. Besides the shifting from 5-6 there isn’t any other slippage.

 

[carguy75]

If the fluid level is OK and you still have the symptoms, a reset may be necessary. The new fluid has different characteristics from the old fluid and the TCM has different pressure values in my opinion.

Make sense. If all fails then a reset could help I suppose. Nothing to lose by doing it. Problem is that you will need a high end scan tool to do it on the Genesis.

 

[carguy75]

Thank you to everyone above.

I actually changed my fluids a total of 3 times. First time same problem then next day I took to friends shop as they had the lift. Same problem was observed. Last time (yesterday) I did it at home.

All 3 times I made sure to be properly leveled. Made sure to go thru gears and adequate temperature before checking overflow valve with a steady stream coming out.

I haven’t tried the reset. Besides the shifting from 5-6 there isn’t any other slippage.

Sounds like you filled it up correctly. Hopefully a reset will solve the problem. Do you have a scan tool that can perform a transmission adaptation reset on a 2015+ Hyundai?

 

[koovoodoo]

Sounds like you filled it up correctly. Hopefully a reset will solve the problem. Do you have a scan tool that can perform a transmission adaptation reset on a 2015+ Hyundai?

I don’t have a tool myself. Not sure if some of the shops will have it either. Reading thru other threads it seems like I need to ask for a g scanner.

EDIT:
I used the thinkscan tool from a friend's shop and it's not supported (the A/T Reset). I was able to reset some other modules though.

FYI: If you guys ever get the vehicle to spin while on the lift, it may have an effect on the front left/right modules which then has an effect on the electronic stability control (my car was a little wonky in terms of suspension prior to the reset).

 

[carguy75]

I don’t have a tool myself. Not sure if some of the shops will have it either. Reading thru other threads it seems like I need to ask for a g scanner.

EDIT:
I used the thinkscan tool from a friend's shop and it's not supported (the A/T Reset). I was able to reset some other modules though.

FYI: If you guys ever get the vehicle to spin while on the lift, it may have an effect on the front left/right modules which then has an effect on the electronic stability control (my car was a little wonky in terms of suspension prior to the reset).

I believe you will need a scan tool that can perform bi-directional commands. Those units are usually over $500.

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[carguy75]

Question. Did your Genesis have any shifting problems before the transmission fluid and filter change was performed?

 

[koovoodoo]

Question. Did your Genesis have any shifting problems before the transmission fluid and filter change was performed?

The shifting wasn't super smooth but not the same current problem that I have. And I have not changed the filter yet, only changed the transmission fluid 3x time now. Was trying to change a few times any ways to get as much out prior to filter/pan change.

 

[carguy75]

The shifting wasn't super smooth but not the same current problem that I have. And I have not changed the filter yet, only changed the transmission fluid 3x time now. Was trying to change a few times any ways to get as much out prior to filter/pan change.

Well you can try changing the solenoids, but to be honest it can be anything with a transmission with over 100k miles.

The problem could be mechanical(worn clutches, damaged sun-gear/sun-shell), electrical(solenoids,wiring), the aftermarket Valvoline Max-life transmission fluid may not be a good replacement fluid for the Hyundai transmission. No amount of keyboard mechanics with solve this problem for you.

I personally would start with using a specific Hyundai SP-IV RR fluid, not the universal stuff like the Maxlife. And then the solenoids if the problem persists after the fluid change. Last; just have a transmission shop take a look at the internals if the first two methods does not work.

 

[skipgen]

I believe some of the cheapie scanners can at least give you an indication of whether you need a reset or not - I think the message is something like "adaptive values exceeded" or something like that.

 

[koovoodoo]

Well you can try changing the solenoids, but to be honest it can be anything with a transmission with over 100k miles.

The problem could be mechanical(worn clutches, damaged sun-gear/sun-shell), electrical(solenoids,wiring), the aftermarket Valvoline Max-life transmission fluid may not be a good replacement fluid for the Hyundai transmission. No amount of keyboard mechanics with solve this problem for you.

I personally would start with using a specific Hyundai SP-IV RR fluid, not the universal stuff like the Maxlife. And then the solenoids if the problem persists after the fluid change. Last; just have a transmission shop take a look at the internals if the first two methods does not work.

Thanks, I do plan on looking around for a mechanic with suitable scanner to try the reset. Then I'll go step wise with, OEM SP IV RR fluids with a new pan/filter.

Question is more about the solenoid? I'm not even sure which solenoid to replace. I can't tell based on the TSB which solenoid applies to which gears. Thanks again.

PS: I just made it from Albuquerque to Phoenix today 1/10 and the car ran great, just he same ole 5th to 6th gear issue I outlined but overall smooth with all other gears.

 

[carguy75]

Thanks, I do plan on looking around for a mechanic with suitable scanner to try the reset. Then I'll go step wise with, OEM SP IV RR fluids with a new pan/filter.

Question is more about the solenoid? I'm not even sure which solenoid to replace. I can't tell based on the TSB which solenoid applies to which gears. Thanks again.

PS: I just made it from Albuquerque to Phoenix today 1/10 and the car ran great, just he same ole 5th to 6th gear issue I outlined but overall smooth with all other gears.

I hope this solenoid chart from the service manual helps. It is for the 2015 5.0 automatic transmission, but it may be similar to your 3.8 transmission solenoids. 5th gear seems to need no solenoid to be activated, but 6th gear needs the 35R/C and 6/C solenoids activated. since the other gears shift perfectly; I would look into buying the 6/C solenoid since it is only used by 6th gear.

 

[Husam]

Hello, I recently got the 2015 3.8 rwd 102k miles and was able to change the transmission oil. I had planned on changing the oil first, then wait for the pan with filter to come (ordered already). After changing the oil (max life ATP which is rate for the sp-iv rr spec) , there is a slippage from 5th to 6th gear. When changing gear it would rev up then down then ultimately get into 6th gear. I drive faster than change to 6 then immediately 7th to bypass but obviously not ideal.

I've been reading thru the other pages about the TSB and also some YouTube videos about changing the solenoid valve. Based on the TSB I'm not quite sure which part number to get? I don't have any codes on my vehicle and reading thru other post some people state there might not be any codes?

Also would you guys recommend changing multiple solenoids? I it might be costly but if I'm going to have it disassembled, I figured might as well change if it decreases risk and I plan on keeping the vehicle for a while. Thank you

Is it still slipping from 5th to 6th?

 

[koovoodoo]

Is it still slipping from 5th to 6th?

It still slipping, but I would characterize it as revving up to get into gear. I've had more time to diagnose and see where the problem arise.

It happens from shifting from 5th to 6th gear. If I drive while in 5th gear, get to 30+ mph, then go to neutral then immediately go back into gear, it'll change to 6th gear and is smooth. If I drive in 5th gear to >35mph I can do a double shift to 7th gear and it'll take a little longer but will go in smoothly, afterwards can downshift from 7th to 6th gear.

I think @carguy75 might be right and that it's likely 6th gear that is the problem and not 5th gear.

As for myself, I have change oil a few times already, just changed the oil pan and new oil 2 days ago (same problem). I was able to to clean the solenoid a bit but maybe not as thorough as the instruction videos out there.

Next up to trial in the coming days is to find a way to reset the A/T. Afterwards would be solenoid change.

At least I'm very comfortable doing all this now. Learned quite a bit.

 

[Husam]

It still slipping, but I would characterize it as revving up to get into gear. I've had more time to diagnose and see where the problem arise.

It happens from shifting from 5th to 6th gear. If I drive while in 5th gear, get to 30+ mph, then go to neutral then immediately go back into gear, it'll change to 6th gear and is smooth. If I drive in 5th gear to >35mph I can do a double shift to 7th gear and it'll take a little longer but will go in smoothly, afterwards can downshift from 7th to 6th gear.

I think @carguy75 might be right and that it's likely 6th gear that is the problem and not 5th gear.

As for myself, I have change oil a few times already, just changed the oil pan and new oil 2 days ago (same problem). I was able to to clean the solenoid a bit but maybe not as thorough as the instruction videos out there.

Next up to trial in the coming days is to find a way to reset the A/T. Afterwards would be solenoid change.

At least I'm very comfortable doing all this now. Learned quite a bit.

Here is an update from my side.

I did an ATF drain and fill with a non-OEM fluid a couple of days ago and added a fluid conditioner.

I didn't have a slippage from 5 to 6 initially, however after the ATF drain and fill, I got the slippage for a couple of days.

The slippage for me continues to be from 2 to 3 and from 4 to 5.

 

[carguy75]

Here is an update from my side.

I did an ATF drain and fill with a non-OEM fluid a couple of days ago and added a fluid conditioner.

I didn't have a slippage from 5 to 6 initially, however after the ATF drain and fill, I got the slippage for a couple of days.

The slippage for me continues to be from 2 to 3 and from 4 to 5.

What aftermarket fluid did you use?

I am starting to think that the filling process for aftermarket fluid may need to be adjusted to account for a different amount of fluid expansion when the fluid is warm compared to the OEM fluid.

I used a aftermarket fluid that is formulated like the stock fluid so I did not have any issues, but universal fluids may be formulated different enough that the fluid may need to be filled at a different operating temperature for a proper fill up. Just speculation.