My 2000 chevy tracker will not shift into 4 wheel drive?

check your oil level may be low.

You can take this with a grain of salt but I am a junior in high school taking auto mechanics and my teacher use to work for a chevrolet dealership where they had a geo tracker come in because it would drive fine until placed in 4 wheel drive. Once placed in 4 wheel it would not move because front and rear differentials were geared differently from factory causing the wheels to lock up. If it has never been able to go into 4 wheel since you have owned it I hope this will help...

it may be the sensor if it has one or it may be the unit it self

Go under the vehicle and check the four wheel drive linkage.

2001 Chevy Tracker 6 cyl Four Wheel Drive Automatic

My 4 wheel drive stop working on my 2001 ZR2 chevrolet Tracker. It has a shifter on the floor and when it is put into 4 hi or 4 lo. the vehicle does not change from two wheel drive into 4. The 4x4 Dash light indicator stop coming on. What should I check?
I lost 4x4 traction when driving in icy conditions.

your high low range shift solenoid is out!! change it!

Have you tried putting it in Neutral, then selecting 4-low. That's what we have to do on our 2000 Chevy Blazer. Same with going from 4-low to 4-high or 4-low to 2 high. It will shift from 2-high to 4 high on the fly (not in Neutral) and back.

try putting in neutral then try shifting in to 2h

this noise sounds like your right cv axle. wou might want to have that checked out, they can do great damage if broken while