How do you replace transmission in a 2003 Saturn Ion?

To replace the transmission in a 2003 Saturn Ion, start by disconnecting the battery and draining the Transmission Fluid. Remove the drive axles, exhaust components, and any necessary electrical connections. Support the engine with a jack, then unbolt and remove the old transmission. Finally, install the new transmission by reversing the disassembly steps, ensuring all connections are secure and fluids are topped off.