310T Drivetrain and Transmission Questions and Answers

Question 1

A technician is investigating a complaint of clutch slippage, which is most noticeable when the truck is pulling a heavy load up a grade. Which of the following is the MOST likely cause?

Accepted Answer

Weak pressure plate springs

Answer

Excessive clutch pedal free play

Answer

A worn clutch brake

Answer

A misaligned transmission input shaft

Question 2

What is the primary function of the inter-axle differential (power divider) on a tandem-axle truck when it is unlocked?

Accepted Answer

To allow for speed differences between the forward and rear axles when turning

Answer

To lock both axles together for maximum traction on slippery surfaces

Answer

To provide a secondary gear reduction for increased torque

Answer

To direct all available power to the axle with the most grip

Question 3

A driver reports that their truck, equipped with an Automated Manual Transmission (AMT), intermittently fails to engage a starting gear from neutral. Diagnostic trouble codes point to a fault in the gear selection system. Which of the following components is the MOST likely cause?

Accepted Answer

A faulty electronic shift actuator

Answer

A clogged transmission fluid filter

Answer

A worn-out main shaft synchronizer

Answer

A low-voltage condition at the TCM

Question 4

When assembling a multi-piece driveshaft, which of the following is MOST critical for preventing driveline vibrations?

Accepted Answer

Aligning the yokes on connecting shafts so they are in phase

Answer

Ensuring the slip yoke is lubricated with chassis grease

Answer

Torquing the U-joint strap bolts to the highest possible value

Answer

Installing the U-joint bearing caps in their original positions on the cross

Question 5

In a heavy-duty automatic transmission, what is the primary role of the torque converter?

Accepted Answer

To act as a fluid coupling and multiply engine torque

Answer

To provide the various gear ratios for the transmission

Answer

To engage and disengage a mechanical lock between the engine and transmission

Answer

To filter contaminants from the transmission fluid and cool it

Question 6

A technician is road-testing a truck with a manual transmission and hears a distinct growling noise in all reduction gears. The noise disappears completely when the transmission is shifted into direct drive (1:1 ratio). What is the MOST likely source of the noise?

Accepted Answer

Worn countershaft (layshaft) bearings

Answer

A worn pilot bearing

Answer

A faulty output shaft bearing

Answer

A damaged input shaft bearing