Question I was told I need to have my transfer case serviced.  What is that? Answer On a four-wheel-drive (4WD) vehicle, power needs to be transferred to both the front and rear axles.  T...

You may not know much about transfer cases, but if you have a 4-wheel drive vehicle, you’ve got one.  It makes sure you have power available for both the front and rear axles.  For exa...