After I graduated high school I decided I wanted to learn more about cars because my father had been a mechanic for a large chunk of his life. I had always envied his extensive knowledge and yearned for more of my own. I already knew more than the average person, but not enough to disassemble an entire car and put it back together. Therefore, my dad and I bought a 1968 Plymouth Roadrunner. This was a monster task and it took us a little over a year to go through everything and reassemble the car.
While working on the Roadrunner, there was one part in particular that I learned the most about. That was the gearbox in the transmission. We replaced nearly every part in this element. The old gearbox was the stock model. It needed to be replaced because of age and because we wanted to install a shift kit to optimize our lower end, increasing torque. We shopped around for a while and after buying parts from multiple gearbox manufacturers we had all the parts we needed to rebuild the unit. I already knew that the gearbox was responsible for changing gears and adjusting the torque with the speed of the car accordingly, in order to produce the results you wanted while driving. However, to actually rebuild the unit top to bottom was an entirely new lesson.
After we installed the new shift kit in the gearbox, the Roadrunner was now drivable again. It was time to compare the old original engine and transmission with the new and rebuilt engine and transmission/gearbox. The difference blew my fathers and my mind. Before our car produced around 250hp and had highway gearing, but now we had 500hp and a street racing gearing set up. Needless to say we were more than pleased with the results!