The following should put the automatic (N-CVT) gearbox into it's self diagnostic test, helping you narrow down any problems you're experiencing.
Self Diagnostic Method:
1. Keeping the ignition off and all pedals released move the selector / gear lever to the "D" position.
2. Turn ignition on - but dont start the vehicle.
3. Depress and hold brake pedal, then fully depress and hold the accelerator pedal.
4. Then move the selector / gear lever in the following order: Ds - D - N - R - P
5. Release the accelerator pedal, then the brake.
6. Start the car...(gear lever still in "P")
7. The N-CVT dashboard warning light will start to blink, count them and compare with the fault code list below)
8. Switch off ignition to stop self diagnostic procedure.
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The fault code output blinks are made up as follows:
No fault found: There is a 2 second pause, followed by the light remaining on for 2 seconds and then 7 short on/off second blinks.
If a fault is detected one of these 7 short blinks will remain on longer than the others.
Fault Code 1 - The first blink is on longer than the others - Accelerator or accelerator position switch circuit is short circuited or diconnected.
Fault Code 2 - The second blink is on longer than the others - Inhibit switch circuit is short circuited or diconnected.
Fault Code 3 - The third blink is on longer than the others - Vehicle speed sensor circuit is short circuited or diconnected.
Fault Code 4 - The fourth blink is on longer than the others - electro-magnetic clutch coil circuit is short circuited or diconnected.
Fault Code 5 - The fifth blink is on longer than the others - Line pressure solenoid circuit is short circuited or diconnected.
Fault Code 6 - The sixth blink is on longer than the others - Torque signal circuit is short circuited or diconnected.
Fault Code 7 - The seventh blink is on longer than the others - ABS signal or idle up relay circuit is short circuited or diconnected.
Fault Code No Number - Lamp blinks at 4Hz repeatedly - Battery supply fault or memory back-up fault.
Fault Code No Number - Lamp does not blink - Check all components.
The squeaking your experiencing at certain speeds is pretty common which could indicate the belts inside the box.
I would also check the fluid level.
