3.3TT Transmission and Diff Fluid

JTank1

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I've had my Stinger for ~20k miles now and was looking into what others had done on the forums. Haven't seem much info between the trans and limited slip diff. After thinking about OEM "lifetime" fluids I figure I spend a few hard earned dollars and do a full (filter & fluid) service on our cars. If everything looked great I'll extend my next maintenance but if it didn't, I'll have peace of mind.

Now of course fluid color doesn't necessarily mean that it has gone bad but considering what I saw, very happy I performed this service early. I can't imagine what another 80k plus would look like. Posting pictures here in case anyone else was interested. For reference, ~75% of my driving is highway commuting. Used all OEM fluids.

Transmission: Old transmission pan, absolutely full of shimmer and glitter. Magnets had some fuzz as expected. The filter element is apparently a mesh-foam type material. Looked like that could get clogged much easier than a traditional screen. Could see this looking down into the vertical larger tube. Fluid was pretty dark but otherwise no surprises other than all the glitter which settled quickly in the bucket. Used about 8 qts to fully drain, flush new pan once, and then refill. Would highly recommend using one of the pressurized containers which screw into the level check drain plug. Seemed like the transmission fill plug had been loctite in place, was absolutely not able to get mine out. Ended up filling from the bottom like a lot of newer models are requiring. Also, the harsh downshifts were noticeably smoother after changing the fluid. We'll see how long it lasts but I was surprised.
Trans Pan.webpOld Trans.webp


Rear Differential: Cleaned off what seemed to be a reasonable amount of material from the drain plug magnet. Old fluid was very dark and full of glitter; was obvious when stirring the fluid around. Compared to the ease to do and minimal cost for ~1.5 qts of fluid, this is a no-brainer for me to replace every 20k moving forward. Zip tied a tube to a sealable bag and squeezed the new stuff into the fill plug. Interesting that the recommended amount (equal to amount drained) did not overflow the fill plug. So not sure its meant to be used as a level check in our case.
Old Diff.webpNew Diff.webp
 
Frustratingly, the transfer case in our cars are "supposed lifetime" non serviceable... I'm following the "severe usage" schedule for maintenance from the manual(i think most people are closer to the severe usage than they think due to stop and go traffic or short trips) which states 60k miles for the automatic transmission, 36k miles for the LSD rear diff(72k without lsd) and Spark plugs "more frequently" than the normal schedule which puts those at 42k miles. I'm probably going to get the front and rear diffs done at the same time around 30k miles for my self, I drive quickly but not hard, and the trans fluid done at ~60k miles ... I really want to get the transfer case fluid done around the 60k mark as well as it's a similar setup to the bmw units and i know those benefit a lot with a fluid change... 1645738160396.webp
 
I've had my Stinger for ~20k miles now and was looking into what others had done on the forums. Haven't seem much info between the trans and limited slip diff. After thinking about OEM "lifetime" fluids I figure I spend a few hard earned dollars and do a full (filter & fluid) service on our cars. If everything looked great I'll extend my next maintenance but if it didn't, I'll have peace of mind.

Now of course fluid color doesn't necessarily mean that it has gone bad but considering what I saw, very happy I performed this service early. I can't imagine what another 80k plus would look like. Posting pictures here in case anyone else was interested. For reference, ~75% of my driving is highway commuting. Used all OEM fluids.

Transmission: Old transmission pan, absolutely full of shimmer and glitter. Magnets had some fuzz as expected. The filter element is apparently a mesh-foam type material. Looked like that could get clogged much easier than a traditional screen. Could see this looking down into the vertical larger tube. Fluid was pretty dark but otherwise no surprises other than all the glitter which settled quickly in the bucket. Used about 8 qts to fully drain, flush new pan once, and then refill. Would highly recommend using one of the pressurized containers which screw into the level check drain plug. Seemed like the transmission fill plug had been loctite in place, was absolutely not able to get mine out. Ended up filling from the bottom like a lot of newer models are requiring. Also, the harsh downshifts were noticeably smoother after changing the fluid. We'll see how long it lasts but I was surprised.
View attachment 68195View attachment 68196


Rear Differential: Cleaned off what seemed to be a reasonable amount of material from the drain plug magnet. Old fluid was very dark and full of glitter; was obvious when stirring the fluid around. Compared to the ease to do and minimal cost for ~1.5 qts of fluid, this is a no-brainer for me to replace every 20k moving forward. Zip tied a tube to a sealable bag and squeezed the new stuff into the fill plug. Interesting that the recommended amount (equal to amount drained) did not overflow the fill plug. So not sure its meant to be used as a level check in our case.
View attachment 68197View attachment 68198
For the transmission did measure how much fluid was drained out then put that exact amount back in? Or did you actually do a level check after you finished changing the fluid? You said it was about 4 quarts per drain? Thanks
 
______________________________
Frustratingly, the transfer case in our cars are "supposed lifetime" non serviceable... I'm following the "severe usage" schedule for maintenance from the manual(i think most people are closer to the severe usage than they think due to stop and go traffic or short trips) which states 60k miles for the automatic transmission, 36k miles for the LSD (Limited Slip Differential) rear diff(72k without LSD (Limited Slip Differential)) and Spark plugs "more frequently" than the normal schedule which puts those at 42k miles. I'm probably going to get the front and rear diffs done at the same time around 30k miles for my self, I drive quickly but not hard, and the trans fluid done at ~60k miles ... I really want to get the transfer case fluid done around the 60k mark as well as it's a similar setup to the bmw units and i know those benefit a lot with a fluid change... View attachment 68199
I fall under letter J in the severe driving conditions lol
 
From interior to exterior to high performance - everything you need for your Stinger awaits you...
For the transmission did measure how much fluid was drained out then put that exact amount back in? Or did you actually do a level check after you finished changing the fluid? You said it was about 4 quarts per drain? Thanks
Measured everything I took out but used the level check process to get the correct fluid level, its very easy. With the car on to have the trans pump running, keep filling fluid until it overflows the drain-check plug, wait a few seconds, and close all the plugs. Initial drain was about 3.5 qts from the drain plug with the car off and another 1.5 left in the pan when I took it off. Bought 10 qts of fluid and was able to fill them with about 9.5 qts of used fluid when I was done. Considering I spilled some, looks like I filled it with close to what came out.
 
What fluids did you use? Also any additives?
 
Measured everything I took out but used the level check process to get the correct fluid level, its very easy. With the car on to have the trans pump running, keep filling fluid until it overflows the drain-check plug, wait a few seconds, and close all the plugs. Initial drain was about 3.5 qts from the drain plug with the car off and another 1.5 left in the pan when I took it off. Bought 10 qts of fluid and was able to fill them with about 9.5 qts of used fluid when I was done. Considering I spilled some, looks like I filled it with close to what came out.
Thanks for the info I'll definitely do the level check as the last step. I'm gonna go with Ravenol products. Appears to be a solid lubricants company from Germany. I'm going to give their 5W'-30 DXG engine oil a try also. It looks like they have the latest and greatest oil products available.
 
Thanks for the info I'll definitely do the level check as the last step. I'm gonna go with Ravenol products. Appears to be a solid lubricants company from Germany. I'm going to give their 5W'-30 DXG engine oil a try also. It looks like they have the latest and greatest oil products available.
Saw Ravenol as well. They seem to be the OEM fluid producer. Ended up using KIA fluid from the dealer at $13 a qt. Part number is UM014-CH065.
 
I thought the trans in this car was a lifetime fluid?
Personally I don't believe in lifetime fluids like most guys on here, but doesn't that mean there is no fill plug or drain?
And is there actually a trans dipstick in this?
 
______________________________
From interior to exterior to high performance - everything you need for your Stinger awaits you...
I thought the trans in this car was a lifetime fluid?
Personally I don't believe in lifetime fluids like most guys on here, but doesn't that mean there is no fill plug or drain?
And is there actually a trans dipstick in this?
no trans dipstick but not lifetime, the severe maintenance plan has the trans fluid replaced at 60k miles
 
no trans dipstick but not lifetime, the severe maintenance plan has the trans fluid replaced at 60k miles
Exactly, maybe if you say 100k is lifetime of your car....

But the service manual has level check and replacement procedures outlined. Trans is serviceable but you need to get under the car.
 
Exactly, maybe if you say 100k is lifetime of your car....

But the service manual has level check and replacement procedures outlined. Trans is serviceable but you need to get under the car.
yep.. even on our bmws and my friends newer bmw, "lifetime" fluid fine print pretty much always is 100k miles.. 1646778129133.webp
 
cool
I have no issue getting under the car
Is there any procedure documented? I just like to find out where the drain and fills are before starting something so I don't end up needing a $5 tube or hand pump and have to run out mid job
Honestly, mine only has 12k on it now but I like to do trannies and diffs around 10-15k from new just since they are freshly broken in, and after that follow the schedule
 
cool
I have no issue getting under the car
Is there any procedure documented? I just like to find out where the drain and fills are before starting something so I don't end up needing a $5 tube or hand pump and have to run out mid job
Honestly, mine only has 12k on it now but I like to do trannies and diffs around 10-15k from new just since they are freshly broken in, and after that follow the schedule
I had purchased the KIA web portal manual in the past but I found that the details on kstinger dot com are a good place to start.
 
From interior to exterior to high performance - everything you need for your Stinger awaits you...
I'm guessing there is no drain? That's why the OP dropped the whole pan?
I hate the ones where you have to drop the pan.
 
______________________________
there is a drain plug
 
What diff oil did you use for the rear? I have a G70 so visited my Genesis dealer. They were unable to tell me what oil to use and of course had nothing. My next visit is to the Kia dealer but it'd be nice to be informed. So far I believe the correct oil for LSD diffs is 02100-00121
 
manual says 75-85 synthetic GL5
I just did mine with 75-90 synthetic GL5
 
What diff oil did you use for the rear? I have a G70 so visited my Genesis dealer. They were unable to tell me what oil to use and of course had nothing. My next visit is to the Kia dealer but it'd be nice to be informed. So far I believe the correct oil for LSD (Limited Slip Differential) diffs is 02100-00121
that is correct for the lsd rear end .
 
From interior to exterior to high performance - everything you need for your Stinger awaits you...
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