Car Tuning Drivetrain and Transmission 2

Question 1

What is the primary purpose of a short-throw shifter kit in a manual transmission car?

Accepted Answer

Reduces the distance the shifter travels between gears

Answer

A short-throw shifter reduces the throw distance between gears, enabling quicker and more precise gear changes.

Question 2

Which differential type is most commonly used in performance AWD tuning builds because it actively distributes torque between axles?

Accepted Answer

Electronic limited-slip differential (eLSD)

Answer

An eLSD uses electronic controls to actively vary torque distribution, making it the top choice for AWD performance applications.

Question 3

When upgrading a transmission for high-horsepower use, what does 'gear dog engagement' refer to in a dog-ring gearbox?

Accepted Answer

Positive interlocking teeth that lock gears to the shaft for fast shifts

Answer

Dog-ring gearboxes use positive-locking dog teeth instead of synchros, allowing near-instant gear engagement under load.

Question 4

A tuner is upgrading a RWD car and wants to run a Ford 9-inch rear axle. What is the main advantage of this axle housing?

Accepted Answer

Its drop-out center section allows ring and pinion changes without removing the axle

Answer

The Ford 9-inch's removable center section (drop-out) allows gear ratio and differential swaps without pulling the entire axle assembly.

Question 5

What happens to driveshaft angle (U-joint operating angle) when you lower a RWD vehicle significantly?

Accepted Answer

The angle increases, potentially causing vibration and U-joint wear

Answer

Lowering a vehicle steepens driveshaft operating angles, increasing vibration and accelerating U-joint wear if not corrected.

Car Tuning Practice Test