Do you have to remove the engine on a 1998 Saturn Sl to work on the rear main seal on the engine I thought all I needed to do was remove the transmission?

To replace the rear main seal on a 1998 Saturn SL, you typically do not need to remove the engine entirely. Instead, you can often just remove the transmission. However, it may be necessary to support the engine and possibly disconnect some components to access the seal properly. Always refer to a repair manual for detailed instructions specific to your vehicle.