Transmissions 162 Sean Grover

When does a Differential work?

• When the vehicle is turning

• When the vehicle is going straight ahead

• Over bumps

• During acceleration and braking.

What does the Differential do?

• Changes gear

• It allows the wheels to move at different speeds when cornering

• It allows the wheels to turn at the same speed when cornering

• Multiplies speed

Gear ratios

Crown wheel = 48 Teeth, Pinion = 12 Teeth. What is the gear ratio?

• 4:1

• 1:4

• 1:1

• 2:8

If there is 110N at the pinion. What is the torque at the driveshaft if the gear ratio is 4:1?

• 27.5

• 880

• 440

• 69

How would you deal with a split CV boot?

• Stitch it up

• Glue it together

• Clean the joint, renew the grease and replace boot

• Do nothing

What do De-temp springs do?

• Acts as Suspension

• Emits light

• Holds gear selector in place

• Stops gears jumping out

What fault would a worn selector fork cause?

• Gears may not engage properly

• Gears might jump out

• Engine may not rev

• Two gears might be selected

Once you you have fitted a new propshaft what do you need to check for?

• A Screeching sound

• Vibrations

• Over gearing

• Steering geometry

Which components are part of a clutch system?

• Pressure plate

• Diaphram spring

• Inner fulcrum ring

• Thrust bearing

What two types of gears are commonly used in a manual light vehicle gearbox?

• Helical Gears

• Spur Gears

• Double helical

• Epicyclic gears