Transmission Jeep Grand Cherokee

I have owned a 2000, a 2002 and now a 2004 Grand Jeep Cherokee. I
would have bought an '05 or '06 but held off because I didn't like the
transmission that they have been using since '04.

As I understand it, you go into 4 wheel drive automatically. I've been
told that you can do it manually, but I wasn't able to see how in the
couple I've tried. Is this true, and if so, how do you do it?

Secondly, I thought I saw a transmission in the new Jeeps - either
advertised or in person - whereby you could slip into 4 wheel drive LOW
manually. Is this true?

I like the old transmisson like the one in my '04 where you can manually
put it in 4 wheel Drive part time, 4 wheel all the time and 4 wheel
Drive LOW. That LOW gear gives me the confidence of being able to climb
out of almost anything and I don't see that same capability in the Jeeps
since '04.

Since I can't seem to find what I want in the Jeep anymore, is anyone
using a similar transmission in another make?