Before working on an automatic transmission, what procedure would you follow:

Take the vehicle for a road test

Listen to all the customers information

Listen to the receptionists advice

Use only the information found on the diagnostic tool

What would be a regular check on a transmission driveline?

Propeller shaft UJ and sliding spline re-grease and centre end float

Propeller shaft linkage and centre bearing housing

Propeller shaft sliding spline re-grease and centre end float

Centre bearing housing and oil seals

When replacing a CV joint gaitor/boot if the CV joint is not worn, you should always:

Remove the old gaiter/boot, clean joint and re-pack with fresh grease

Replace the bearings and regrease

Replace the new gaiter/boot over the existing one to avoid disturbing the joint

Remove the old gaiter/boot and re-pack with fresh grease

If the oil is leaking from transmission or final drive seals under normal driving conditions, what could be the possible cause?

Incorrect lubricant used in transmission

In an automatic transmission, what would be the potential cause of clutch slip?

Incorrect transmission oil pressure

When taper roller bearings are replaced you should always

Re-pack them with grease, measure, shim them and preload correctly

Re-pack them with grease and preload them correctly

Re-pack them with grease, measure and shim them correctly

Repack them with grease and set end float using DTI

An engine flywheel allows the powertrain to:

Convert potential energy from the engine into kinetic energy stored in the flywheel

Convert kinetic energy from the engine into potential energy stored in the flywheel

Convert reciprocating energy from the engine into potential energy stored in the flywheel

Convert kinetic energy from the engine into reciprocating energy stored in the flywheel

If a driveshaft had a measured runout of 1.5mm, what would the symptom be when driving the vehicle?

Vibration that was severe at low vehicle speeds, but less at high vehicle speeds

Nothing, this is an acceptable level of runout

Vibration that was severe at high engine speeds, but less at low engine speeds

Vibration that was severe at high vehicle speeds, but less at low vehicle speeds

In a CVT transmission when pulling away, the pulleys/variators would be:

Input close together, output far apart

Output close together, input far apart

The seals on cassette wheel bearings:

Can't be changed without changing the whole bearing

Should be changed at service intervals

A vehicle has excessive wheel bearing end float on the front right wheel. This would cause:

Front tyre wear on inner of the tyre

Rear tyre wear on the outer of the tyre

Suspension oscillations at high speed

The vehicle to pull to the left

With an automatic transmission, when reading data from the transmission, how would you access data stored in the RAM?

You cannot access RAM storage in the transmission

What would you check after fitting a replacement clutch? (More than one correct answer)

That all gears can be engaged without any crunching/baulking

What is the main difference between a single mass and a dual mass flywheel?

DMF have longer softer springs to absorb engine torsional vibrations

Single mass flywheel has less inertia

Rotoflex aka: rubber coupling joint failure, how would you repair it?

Replace the worn bearings and refit

What would be an example of electric to electronic?

An input from a switch to an ECU to CAN bus communication e.g. any where a simple on/off signal is converted to data

A Bluetooth signal from your phone to the media ECU

What situation would cause you to replace a whole driveshaft?

If you cannot purchase individual CV joints

If the other driveshaft required replacing i.e. always replace as a pair.

What is the advantage of a lock-up clutch in an automatic

Increased mpg, reduce transmission losses

Allows transmission to lock e.g. for park

It allows gears to be selected smoothly

It allows the transmission to be locked as an anti-theft device

Under what circumstances would a wheel bearing be noisiest?

Under cornering, load or high road speed

Under light load or overrun conditions

How does a manual gearbox change gear?

Mechanical linkage or two shift cables

Mechanical linkage or one shift cable

What components does a conventional automatic gearbox contain?

Torque converter, lock up clutch, epicyclic gears, wet multiplate clutch/brake bands, solenoid/valve block

Variators, segmented belt, epicyclic gears for reverse, wet multiplate clutch, mechatronics unit

Synchro packs, selector forks, dry single plate clutch

Synchro packs, selector forks, wet multi-plate clutches, mechatronics unit

What components does a CVT gearbox contain?

Variators, segmented belt, epicyclic gears for reverse, wet multiplate clutch, mechatronics unit

Torque converter, lock up clutch, epicyclic gears, wet multiplate clutch/brake bands, solenoid/valve block

Synchro packs, selector forks, dry single plate clutch

Synchro packs, selector forks, wet multi-plate clutches, mechatronics unit

What components does a manual gearbox contain?

Synchro packs, selector forks, dry single plate clutch

Torque converter, lock up clutch, epicyclic gears, wet multiplate clutch/brake bands, solenoid/valve block

Variators, segmented belt, epicyclic gears for reverse, wet multiplate clutch, mechatronics unit

Synchro packs, selector forks, wet multi-plate clutches, mechatronics unit

What components does a DCT/DSG gearbox contain?

Synchro packs, selector forks, wet multi-plate clutches, mechatronics unit

Torque converter, lock up clutch, epicyclic gears, wet multiplate clutch/brake bands, solenoid/valve block

Variators, segmented belt, epicyclic gears for reverse, wet multiplate clutch, mechatronics unit

Synchro packs, selector forks, dry single plate clutch

What would cause a clutch to slip?

Worn or contaminated clutch/friction plate

How would you measure the output of an ECU

Check the supply to and operation of all actuators

Transmissions Revision

Authored by Andrew Westmancoat

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12th Grade

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MULTIPLE CHOICE QUESTION

1 min • 1 pt

How are the two halves of this component connected?

Transmission fluid

Connecting rods

Clutch straps

Coil Springs

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What multiplies the torque in a torque converter?

Impeller

Turbine

Stator

Lock up clutch

MULTIPLE CHOICE QUESTION

1 min • 1 pt

How would paddle shifters communicate with the ECU?

Mechanical linkage

Electronic switches

Hydraulic pressure

Telemetry

MULTIPLE CHOICE QUESTION

1 min • 1 pt

How would you diagnose an automatic transmission output speed sensor?

Measure its temperature

Use an oscilloscope to measure its voltage

Use a multimeter to measure its voltage

Use a feeler gauge to measure its end float

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What would you use to measure and check a final drive pinion bearing?

DTI to measure backlash in the crown-wheel

Torque wrench to set and measure the pinion preload

Engineers blue on the gear teeth to see tooth contact pattern

MULTIPLE CHOICE QUESTION

1 min • 1 pt

In the diagram below, what would you measure/check?

Cross pin length

Side gear clearance

Side gear width

Cross pin diameter

MULTIPLE CHOICE QUESTION

1 min • 1 pt

In the diagram below, what is being checked/measured?

Synchro/baulk ring end clearance

Selector fork/sleeve clearance

Synchro/baulk ring runout

Synchro/balk ring backlash

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Transmissions Revision

How are the two halves of this component connected?

What multiplies the torque in a torque converter?

How would paddle shifters communicate with the ECU?

How would you diagnose an automatic transmission output speed sensor?

What would you use to measure and check a final drive pinion bearing?

In the diagram below, what would you measure/check?

In the diagram below, what is being checked/measured?

Before working on an automatic transmission, what procedure would you follow:

In the image below, what configuration is this?

What is the advantage of a final drive?

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