Looking after your transmission system is important for ensuring that your car is able to smoothly shift gears when you drive. This is true whether you drive a manual vehicle on an automatic. Your complex transmission system is made up of many seperate parts, replacements for which you can find here at the RAC Shop. If you find that your car is making strange noises as you attempt to change gears, such as crunching or grinding, this could indicate that you have a problem with your transmission and you need to get it checked out by a qualified mechanic. Should you need any parts replacing, we stock a full range of transmission parts including CV joint kits, drive couplings, driveshafts, propshafts, gearboxes, linkages, wheel bearings and other components.