How can one check if the four wheel drive is working?

 

Shift it and blip the throttle to see if you feel more torque as you lurch forward- is what i did-

 

If your buying one. Get on pavement. I always check both high and low. Put in high and turn sharp. If it wants to bind and jump the front is pulling. (don't gas on it hard while doing this). Then do the same thing in 4-low.

 

x2. You'll KNOW when this happens. Do it in a parking lot or somewhere flat.