When your Chrysler window regulator begins to fail, the cause can often be traced to the failure of the mechanical parts. Window regulators are made up to 35 metal parts; they weigh from 4.5 to 7 pounds. Window regulators typically depend on a worm gear, which is used in motor and mechanical design to transmit torque between non-intersecting axles. There are two types: arm-and-sector and drum-and-cable. A worm gear is used with a small motor, like the one in your power window set, and is efficient and compact in design. Most window regulators also depend on a linkage, a mechanical plate and spur gears. The mechanical plate moves the window up and down, and it is regulated by the worm gear working with the spur gears. The linkage holds the window. Over time, your power windows' parts can be worn down by the stress of dirt, heat, ultraviolet light and snow. Eventually, the lack of lubrication will cause one of the parts to crack or jam up. Because of the amount of labor and detailed work that is required to remove the door panel, usually it is recommended that DIYers replace the entire window regulator - and possibly the window motor while they are at it - instead of diagnosing and replacing each part of the Chrysler window regulator.