Podcast
Questions and Answers
What is the primary benefit of a locking differential?
What is the primary benefit of a locking differential?
- To increase steering radius
- To enable faster cornering
- To allow torque to be developed in all wheels sharing an axle, regardless of their traction (correct)
- To reduce engine speed
When should you engage the differential lock?
When should you engage the differential lock?
- Below 25mph or when the wheels are not spinning (correct)
- Above 25mph
- When the wheels are spinning
- When driving on dry pavement
What happens to steering radius when the differential lock is engaged?
What happens to steering radius when the differential lock is engaged?
- It increases (correct)
- It remains the same
- It becomes zero
- It decreases
What should you do when the vehicle is freely moving?
What should you do when the vehicle is freely moving?
What should you not do when tire chains are installed?
What should you not do when tire chains are installed?
What is the primary function of the inter-axle differential?
What is the primary function of the inter-axle differential?
When should you engage the inter-axle differential lock?
When should you engage the inter-axle differential lock?
What does the Automatic Traction Control function do?
What does the Automatic Traction Control function do?
What happens to the wheels of a truck with a locking differential when traction is lost on one wheel?
What happens to the wheels of a truck with a locking differential when traction is lost on one wheel?
What should you avoid doing when the inter-axle differential lock is engaged?
What should you avoid doing when the inter-axle differential lock is engaged?
What is the purpose of the inter-axle differential?
What is the purpose of the inter-axle differential?
What happens when the Automatic Traction Control function is triggered?
What happens when the Automatic Traction Control function is triggered?
When should you engage the locking differential?
When should you engage the locking differential?
What is the benefit of a locking differential in snowy conditions?
What is the benefit of a locking differential in snowy conditions?
What should you do when the vehicle is moving freely after engaging the locking differential?
What should you do when the vehicle is moving freely after engaging the locking differential?
What happens when the inter-axle differential lock is engaged in soft or slippery road conditions?
What happens when the inter-axle differential lock is engaged in soft or slippery road conditions?
What is the result of engaging the inter-axle differential lock in tandem axle trucks on soft or slippery road conditions?
What is the result of engaging the inter-axle differential lock in tandem axle trucks on soft or slippery road conditions?
What happens to the wheels of a truck with a locking differential when traction is lost on one wheel?
What happens to the wheels of a truck with a locking differential when traction is lost on one wheel?
What is the purpose of the Automatic Traction Control function?
What is the purpose of the Automatic Traction Control function?
What should be avoided when engaging the locking differential?
What should be avoided when engaging the locking differential?
What is the consequence of engaging the inter-axle differential lock on dry pavement?
What is the consequence of engaging the inter-axle differential lock on dry pavement?
What is the benefit of a locking differential when one wheel has good traction?
What is the benefit of a locking differential when one wheel has good traction?
When should the inter-axle differential lock be engaged?
When should the inter-axle differential lock be engaged?
What is the result of the Automatic Traction Control function being triggered?
What is the result of the Automatic Traction Control function being triggered?
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Study Notes
Locking Differentials
- A locking differential allows torque to be developed in all wheels sharing an axle, regardless of their traction
- It enables the drive wheels to act like they are rotating on a common shaft, keeping the truck moving even if one wheel has good traction
- Never engage the differential lock above 25mph or while the wheels are spinning
- Steering radius will increase when the lock is engaged
- Disengage the lock once the vehicle is freely moving, and avoid driving on dry pavement with the lock engaged
- When tire chains are installed, do not attempt to turn the vehicle with the lock engaged
Inter-axle Differential Lock (Tandem Axle Trucks)
- The inter-axle differential provides for necessary differential action between the axles of a tandem drive unit
- It allows the wheels of either axle to revolve faster or slower than the wheels of the other axle in order to compensate for cornering, uneven road surfaces, and slightly different tire sizes
- Engage the IAD lock only when stopped or moving at slow speed
- Never lock the IAD with the rear wheels spinning
- Disengage the IAD lock once the vehicle is freely moving, and avoid driving on dry pavement with the lock engaged
Automatic Traction Control
- The ATC function automatically applies braking to a drive wheel that is spinning
- Engine speed may also be decreased until traction is achieved
Locking Differentials
- A locking differential allows torque to be developed in all wheels sharing an axle, regardless of their traction
- It enables the drive wheels to act like they are rotating on a common shaft, keeping the truck moving even if one wheel has good traction
- Never engage the differential lock above 25mph or while the wheels are spinning
- Steering radius will increase when the lock is engaged
- Disengage the lock once the vehicle is freely moving, and avoid driving on dry pavement with the lock engaged
- When tire chains are installed, do not attempt to turn the vehicle with the lock engaged
Inter-axle Differential Lock (Tandem Axle Trucks)
- The inter-axle differential provides for necessary differential action between the axles of a tandem drive unit
- It allows the wheels of either axle to revolve faster or slower than the wheels of the other axle in order to compensate for cornering, uneven road surfaces, and slightly different tire sizes
- Engage the IAD lock only when stopped or moving at slow speed
- Never lock the IAD with the rear wheels spinning
- Disengage the IAD lock once the vehicle is freely moving, and avoid driving on dry pavement with the lock engaged
Automatic Traction Control
- The ATC function automatically applies braking to a drive wheel that is spinning
- Engine speed may also be decreased until traction is achieved
Locking Differentials
- A locking differential allows torque to be developed in all wheels sharing an axle, regardless of their traction
- It enables the drive wheels to act like they are rotating on a common shaft, keeping the truck moving even if one wheel has good traction
- Never engage the differential lock above 25mph or while the wheels are spinning
- Steering radius will increase when the lock is engaged
- Disengage the lock once the vehicle is freely moving, and avoid driving on dry pavement with the lock engaged
- When tire chains are installed, do not attempt to turn the vehicle with the lock engaged
Inter-axle Differential Lock (Tandem Axle Trucks)
- The inter-axle differential provides for necessary differential action between the axles of a tandem drive unit
- It allows the wheels of either axle to revolve faster or slower than the wheels of the other axle in order to compensate for cornering, uneven road surfaces, and slightly different tire sizes
- Engage the IAD lock only when stopped or moving at slow speed
- Never lock the IAD with the rear wheels spinning
- Disengage the IAD lock once the vehicle is freely moving, and avoid driving on dry pavement with the lock engaged
Automatic Traction Control
- The ATC function automatically applies braking to a drive wheel that is spinning
- Engine speed may also be decreased until traction is achieved
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