* Transmission: The manual transmission needs to be completely removed and replaced with an automatic transmission. This requires a different bellhousing (the part that connects the engine to the transmission) and potentially other engine modifications to be compatible.
* Computer System: Automatic transmissions require a sophisticated computer system to control shifting. Manual transmission cars don't have this. Retrofitting this is a complex and expensive process.
* Wiring Harness: New wiring would be needed to accommodate the automatic transmission's computer system.
* Shift Linkage and Cables: All the manual shifting components would need to be removed.
* Possibly the Driveshaft: Depending on the car and the automatic transmission being installed, the driveshaft length or type might need changing.
The cost of parts and labor involved would likely far exceed the value of the vehicle, especially considering the specialized skills and knowledge required for such a conversion. It's simply more economical to buy a car that already has an automatic transmission.
