Transfer Case (more)

[pridbor]

I read through my previous thread, great info!, and a couple of the links provided therein, but a few items still seem to be puzzling to me.

Like is the TC operating when NOT in AWD? I.e. ie there an electrical clutch built into the TC, passing power to the drive shaft to the rear Differential? I seem to recall an earlier thread where somebody wanted to make a 2 Wheel drive out of an AWD (something broken?) by disconnecting an electrical connection to the rear Diff.

I might have gotten this all wrong but please help setting me straight.

I will get under my 04 MO tomorrow to see if I have any of the signs of leakage/drippings you see referred to when a potential problem is imminent.

And a question with regards to the Liquid Gasket referred to when re-installing the filler/drain plugs on the TC. Can someone please point me to a good product as I'm heading towards replacing the oil in the TC and want to be properly prepared.

And Oh by the way what "fumoto drain valve" are you referring to? I have no idea of screw size and thread etc

Thanks all for the good information on this board

[njjoe]

Yes, the transfer case is always engaged. There is a solid connection between the front axle, transfer case, and drive shaft. The engagement point is the clutch-pack, and it is located at the point where the driveshaft connects to the rear differential.

So although the transfer case is always engaged it is under a very light load 99.9% of the time. Only when the AWD controller engages the clutch-pack does the TC receive up to 50% of the available torque.

-njjoe

[pridbor]

It's probably just your use of words which confuses me, but I would have thought that: the TC gets its input directly from the engine, sends one output forward to the front diff (integrated with the CVT), rearwards to the clutch which is computer controlled to engage the rear wheels via the drive shaft. Or something to that extent.

Isn't there an "X Ray" drawing of these components somewhere?

I must confess my ignorance to this car as it was my daughters and then my wifes, and I never worked on it other than change oil and other fluids. It has kept running so I have never taken the time to look into the design of it. We love the car which is why we have bought an 2011 SV.

So please be forgiving when I ask simple questions to learn more about the car I'm about to sell it's on Craigslist as we speak.

[njjoe]

Originally Posted by pridbor

It's probably just your use of words which confuses me, but I would have thought that: the TC gets its input directly from the engine, sends one output forward to the front diff (integrated with the CVT), rearwards to the clutch which is computer controlled to engage the rear wheels via the drive shaft. Or something to that extent.

The transfer case on all AWD vehicles is always aft of the transmission.

Engine output is sent first to the transmission, in this case the CVT, and then out to the transfer case.




I hope this helps.

-njjoe

[pridbor]

You are right I forgot to mention the Transmission! Great with a picture explains it perfectly.

Thanks for the clarifications

Any help on a few of my other questions?

[njjoe]

The service manual calls out silicone RTV for the thread sealant.

Any other questions?

-njjoe

[pridbor]

Nope Thanks

[Eric L.]

To answer your last question:

The Fumoto valve is simply a drain plug that replaces your regular oil drain plug - it has a handle on it to open the valve without needing to unscrew the drain plug. Very easy to use and saves time when changing oil. You do not need to know the thread size, just google for the website and you can pick the vehicle from the list.

[pridbor]

Thanks just what i lacked! A few of the sites I went to only had the type by manufacturer and then you had to know the size in mm and threads.
Thanks again