Gear box
This component is simply one that transmits the torque generated through the gearbox from the engine to the wheels in a rotating fashion, propelling the car forwards. The component is essential to the drive of the car so must be strong enough to withstand constant use.
Common front wheel drive vehicles have a central transaxle from the gearbox, then two drive shafts, one from each side extending out to the wheels. Four wheel drive vehicles similarly have these two wheel connecting drive shafts on both the front and rear axles.
Noticeable signs of a loosening or wearing drive shaft are a knocking noise from either side of your car, especially when driving around corners.
Transmission
The transmission works with the engine to provide power to your car’s wheels. A transmission/transaxle keeps the engine’s output optimally matched to the speed and load conditions. Universal and/or Constant Velocity (CV) joints connect to the driveshaft to transmit output power from the transmission to the rear axle on rear-wheel-drive cars and the front axle on front-wheel-drive cars. These joints also allow the driveshaft and/or CV shaft to work at an angle.
Symptoms of concern
- Slipping
- Hesitation
- Bucking
- Grinding gears
- Difficulty shifting