changing oils..
 

H3, 2007, 3.7l automatic transmission
I want to change the transmission and transfer case oil. All other oils has been done. Since I have no idea when it has been done lately and previous owner didn't take proper care at all. Also transmisión doesn't smell kosher, altrough the color is fine. I don't want completely flush it, I just want to change the filter and whatever will drip out from the pan.
. so my question- the transmisión always has been for me mystery for me, and if I was doing similar work on it, I usually was buying the oil directly from diller- that correspond to wehicle. Should I do the same? Or i can put any ATF oil? Same thing with transfer case? If I can put different oil which one? What type? Should I go to full synthetic?
Tnx in advance.

This has been coverd B4...
If you search it there are a few.

Short answer is Use the GM recomended fluids for both. Its the same ATF for Transmission and Transfer Case. There is a good deal on Amazon for the Transmission kit with gasket and filter.

O! You actually covered my 2d question i forgot to ask- if I have ro get a new gascket
Thank you

The links are still active: ATF & Filter change

Look at above thread, get the filter/gasket kit and 2gallons of dex vi.

If you are going to drop the pan and change the filter you might as well add a drain bung to the pan too. ;)

https://cimg2.ibsrv.net/gimg/www.hum...21f42d1a0e.jpg

Ыыы-ыыы-ююю- жжж :)

Anyways, I saw those filter kits coming with gasket and the buttplug:) so ill get the whole thing

Change those. The transfer case oil was all pearly- i guess good thing I did it. I was surprised the drain plug didn't have any magnet.
As of transmisión, I drop the pan, and refill the same quantity that was in there (maybe overfill it 100-200g. But after I defenelely could feel that the transmisión start to shift smoother...I wonder if I should to repeat it (without changing the filter) since I didn't flush it all. The magnet was all fluffy with steel particles..

Simple 3 step process: Clean, Exchange, Change filter!:cool:

If you installed the drain bung in the transmission pan as suggested earlier then just drain and refill again until you have clean red trans fluid. It takes me 2 or 3 pan drains to get the perfect red (new fluid) color.