2009 sportage spins frt and rear wheels all the time when on a ramp 4x4 switch in dash seems to work fine seems like in 4x4 all the time no codes

Check the oil in the transfer case. If it has lots of metal in it... time for a new one. They aren't the world's strongest.
Another check: Lift the front of the truck, while keeping the rear wheels on the ground. Engage the 4x4 switch (then turn the truck off) crawl under and try to turn the front driveshaft by hand. If it turns and the wheels turn, the transfer case is the problem if it turns but the front wheels don't... front diff issues. Any grinding, crunching etc is also a clue.

If wheels spin slow down and or touch brakes to allow abs to kick in

Check the transfer case. Put a jack under the rear axle and jack up the rear wheels. Have a helper put in 4 wheel and the trans in drive. Have him/her ease off the brake and see if the rear wheels spin. If they spin, 4x4 isn't working. If the truck tries to pull forward with the rear wheels up then it works. Now, if the rear wheels are spinning carefully look under the truck and see if the front driveshaft is spinning along with the rear driveshaft. If the front shaft is spinning then it is an axle problem. If the front shaft is not spinning then it is a transfer case problem. GM has a problem with the NP263 case.

Best and cheapest to fix is to replace vacuum lockers with manual lockers. It is easy to do. Only 6 bolts per front wheel. This is the most trusted way of 100% engagement.

probably the same button that locks the differential automatically locks the 4x4. if the 4x4 light is on your dash then the 4x4 should be working

Rear Wheel Drive (if not in 4x4 mode or not a 4x4 equipped model)

Is the four wheel drive activated by vacuum? Check vacuum.

That's for the dash switch for 4x4- need to properly diagnose also you could have bad wires, most likely water intrusion for 4x4 module rt frt passenger kick panel inspect for white corrosion on terminals & connectors, clean with terminal cleaner from radio shack

If you have had everything checked and it seems like everything is fine. I would check your tires. You may have a bad tire. I had a similar problem on my Explorer, really bad shimmy and shake sometimes. I new everything was ok, because it was basically a new vehicle. But it turned out to be the tires that had staterd to seperate. Hope this helps.

I had a similar problem......there was a rhythmic creaking noise coming from the passendger side rear wheel......I lubricated the contact points where the parking brake mechanism contacts the wheel and the noise is now gone...and has been for several months now.