Q: Have front wheel drive no rear wheel drive

Hi there. Raise up the vehicle and put it on jack stands. Start up the engine and put it into gear. Watch to see which tires move. Put the transmission in neutral and put the transfer case in 4WD high. Put the vehicle in gear and see what tires move. If only the front tires move all the time and the rear tires are not moving, then there could be an issue with the transfer case or the rear differential. While the front wheels are turning, look at the rear drive shaft and see if its turning. If the shaft is not turning, then the output shaft to the transfer case has broke and the transfer case needs repaired or replaced. If the drive shaft is turning, then either the pinion or ring gear or both are damaged inside the rear differential and needs replaced. If you need further assistance with your rear differential not working, then seek out a professional, such as one from Your Mechanic, to help you.