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Hi everyone. So I searched the forum but I'm not sure what to search for.
What I'm up to is wanting to change the 4matic fluid in the small transfer case. If I search it wants to send me to transfer cases and replacing the gear oil always comes up. I was under the impression that the small 4matic transfer case takes a different type of ATF.
What fluid should we be putting in that gearbox? And possibly some examples or the factory part number?
Thanks to all who look and add input.
Sorry I forgot.
My car is a 2014 c300 sport with the m276 v6 3.5 engine.
Last edited by RobertR728; May 31, 2024 at 07:57 PM.
I thought it was atf. In a document I have it mentions prefilling the transfer case with transmission oil. It goes on to say fill the transmission with transmission oil. Same thing?
That is the same uncertainty I run across. They do call it transmission oil in some documents. But then it seems maybe the slang for it is transfer case even tho it is pretty much a automatic transfer case. Similar to a set of spider gears in a rear end.
Also I've read that is a different spec for the fluid but I can't seem to find that now. But they did emphasize it's different than the trans fluids. I honestly don't know I've never drained one before.
Very good info. Thank you TimC300.
So from reading the article you posted if the transmission actually circulates fluid thru there then it should have the same blue trans fluid as my transmission does. Yes?
Yes, i have no idea how but it circulates the same fluid in the transfer case. I watched a few videos on youtube on rebuilding the 922.9 transfer case and they confirmed it.
Yes, i have no idea how but it circulates the same fluid in the transfer case. I watched a few videos on youtube on rebuilding the 922.9 transfer case and they confirmed it.
I'm gonna check this out for sure because I have left over trans fluids to drain and replace that fluid. Thank you again you are a fountain of knowledge and research when it comes to these models.
Raining today so tomorrow it is
Last edited by RobertR728; Jun 1, 2024 at 01:25 PM.
Doesn't the transfer case share the transmissions ATF....so changing trans fluid will take care of transfer case. Some DIY write ups for trans fluid change out mention jacking up the front of the car so fluid fills rear TC more easily. " I have left over trans fluids to drain and replace that fluid" suggests separate fill procedure..not the case.
Yes, i have no idea how but it circulates the same fluid in the transfer case. I watched a few videos on youtube on rebuilding the 922.9 transfer case and they confirmed it.
I meant to write 722.9 transfer case, not 922.9. Dont want to confuse anyone.
Well once again I think I know how something works on a car and it's not what I think. It does look like there is a drain on the transfer case butt with it being attached and sharing circulation with the transmission I don't see a reason to mess with it. Just did a tramsition filter and the pan was rusty around three drain. So for fall service I've got a new pan too install and I put a seconds drain plug in the new pan. Now every oil change I can drain the tanas and full it grill it comes out there factory drain and never have to tip the internet piece over too drain. It'll just be my measurement for full. I believe this will help extend there life and be pretty easy to do along with a regular oil change.
I'm glad for this forum and being welcome too all a question like this. But in the end I'm being glad I asked and got positive feedback. And umm very glad I didn't putt hear oil in it. That would Baker turned out very bad.
Last edited by RobertR728; Jun 6, 2024 at 05:40 PM.
I have the 722.964 transmission and the transfer case parts diagram shows a drain bolt on the bottom and an oil fill on the side. I'll have to take a look and see if they are there. The drain may be hidden by the transmission mount bracket. I almost want to say I did notice a hex bolt like yours when I was under there looking at it before. I looked at photos of the cover and it does look like that bolt is a drain, can see the threads of it inside the cover.
May even be a good idea to drain the fluid from that drain to get as much of the old fluid out as possible, just be sure to fill it back up from the top fill if you do.
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