While your car isn't going to go anywhere without the motor, if you don't have a working transmission, it doesn't matter how powerful your engine is, your car isn't going to move an inch. What makes the transmission so important to your car and making it move?
The transmission of your car is made up of several different gears. The gears help to contain the power that your engine creates and transmits it out to the wheels. The gears switch out by having the clutch engage and putting the transmission into neutral so that the new gear can be activated. In an automatic transmission, the clutch automatically engages when the gears reach a certain RPM. In a manual transmission, the driver activates the clutch then switches the gear. Those gears help to transmit the energy the motor creates out to the wheels by going through a particular system.
The transmission is attached to the drive train. The drive train runs the length of the car from the transmission to the rear axle. It takes the energy that has come from the motor through the transmission and spins around. The faster you are going, the faster the drive train will spin. When the drive train reaches the axles, there has to be a joint that will allow the direction of spin to change because the way that the drive train spins is perpendicular to the way that the wheels will spin.
The axle will then take the spin from the drive train, through the joints, and transmit it to the wheels, which will then start to turn and let your car go. There will be some kinetic energy loss from the motor to the wheels, just because it has to go through so many steps to get from the motor to the wheels, but it shouldn't be too much. It can take your wheels a moment to catch up when you accelerate because they have to go through everything, but as long as your axles and joints are in good shape, you shouldn't have a long delay.
Making sure that your transmission is in good shape is important. If you have any problems with it, or you are noticing that you have a long lag in between acceleration and going faster, then you should take your car to an auto shop and let them check out your transmission and make sure it's in good shape.
Reach out to a professional who provides transmission services for more information.