If your car has an automatic transmission, it does not have a flywheel; it has a flexplate. It serves many of the same functions as the flywheel like mating to the starter and sending the torque from the crankshaft to the transmission. However, since your automatic transmission has a torque converter, the much flimsier and lighter flexplate is required to join the engine to the transmission. It will usually have large holes or sections cut away from the disc to give it its flexible characteristics, as the torque converter will be putting immense rotary pressure on the plate when you step on the gas. It is unusual that one of these would get damaged by normal use, but any engine rebuild would usually require some transmission work. Also, if your engine is approaching 200,000 miles then it might be time to replace your torque converter and flex plate. Sometimes you can get the ring gear replaced, since that is likely going to wear down before the entire plate.
When automatic transmissions were introduced in the 1940s, they were touted as a safer way to drive. This new kind of transmission allowed drivers to keep both hands on the wheel and both eyes on the road. One complication of delivering power to the transmission was to increase it gradually over the first couple thousand RPMs rather than give it full torque right away. A viscous coupling torque converter performs this task, and key to its ability to do so is cooperation from the flexplate
that it is mounted to. As the engine RPMs quickly increase, it will flex very slightly across its axis as the torque converter catches up to it. That's why the flex plate has holes and other shapes cut out of it. Those spaces are where the plate makes these small adjustments.
Changing a flexplate is the same as changing a flywheel. The bell housing has to be unbolted from the engine, and the engine has to come out of the engine bay to expose the torque converter. Unbolt the converter from the flexplate, and then unbolt that from the crankshaft. Re-installation is essentially the same in reverse. Be careful to put everything back exactly the same way it was when you took it out.
Buying your new flexplate doesn't have to be an arduous or confusing task. Since they are made to function on specific engines found in certain makes and models, you can be sure that the flexplate you find on the Car Parts Discount website will fit exactly like your original. Not only are you sure to get the appropriate part from CPD, it will be made by either a top quality aftermarket or genuine original equipment manufacturer. If that's not enough, the price will be amazingly low and shipping is incredibly quick. So don't delay; buy today.