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Questions and Answers
What is the purpose of a driveshaft?
What is the purpose of a driveshaft?
- To transmit engine torque from transmission to front wheels.
- To transmit engine torque from transmission to rear axle or drive wheels. (correct)
- To connect the transaxle to the drive axle shaft.
- To allow for up and down movement and changing length during suspension travel.
Which materials can driveshafts be made of?
Which materials can driveshafts be made of?
- Only hollow steel tubing.
- Only aluminum.
- Only composite materials.
- Hollow steel tubing, aluminum, or composite materials. (correct)
What is the optimal working angle for a driveshaft?
What is the optimal working angle for a driveshaft?
- 1/2 to 3 degrees. (correct)
- 5 to 10 degrees.
- 15 to 20 degrees.
- 25 to 30 degrees.
What is the purpose of universal joints on a driveshaft?
What is the purpose of universal joints on a driveshaft?
What type of joint is used to reduce driveline-induced vibrations?
What type of joint is used to reduce driveline-induced vibrations?
What is the function of a Constant Velocity (CV) joint?
What is the function of a Constant Velocity (CV) joint?
What is a Rzeppa joint?
What is a Rzeppa joint?
What is the purpose of outer CV joints?
What is the purpose of outer CV joints?
What is the most common cause of damage to the protective outer flexible boot of outer CV joints?
What is the most common cause of damage to the protective outer flexible boot of outer CV joints?
How are replacement driveshafts usually identified?
How are replacement driveshafts usually identified?
What is the purpose of dampener weights on a driveshaft?
What is the purpose of dampener weights on a driveshaft?
What type of joint allows for up and down movement and changing length during suspension travel?
What type of joint allows for up and down movement and changing length during suspension travel?
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Study Notes
- A driveshaft transmits engine torque from transmission to rear axle or drive wheels.
- Most driveshafts are made of hollow steel tubing, but some use aluminum or composite materials.
- Driveshafts are balanced and must have working angles of 1/2 to 3 degrees for optimal performance.
- Universal joints are used at both ends of a driveshaft to allow flexibility and torque transfer.
- Double-Cardan U-joints are used to reduce driveline-induced vibrations.
- Constant velocity joints (CV joints) are designed to rotate without changing speed.
- Rzeppa joint is a type of CV joint that can function at angles up to 40 degrees.
- Outer CV joints are fixed joints that allow up to 40 degrees of movement and transmit engine torque to front wheels.
- The protective outer flexible boot of outer CV joints can be easily damaged by road hazards.
- Replacement driveshafts are usually identified by series of U-joints and center-to-center distance between U-joints.
- CV joints connect the transaxle to the drive axle shaft.
- Inner CV joints allow for up and down movement and changing length during suspension travel.
- Unequal-length half shafts can cause torque steer.
- CV joint boots must be flexible and strong to avoid damage.
- There are four types of boot materials used over CV joints.
- Boot seals should be inspected regularly and replaced if damaged.
- CV joints require special moly grease.
- The exact grease to use depends on the type of joint, location, and boot material.
- Inner CV boots can be damaged by high temperatures and engine oil leaks.
- Dampener weights are used to dampen out certain drive line vibrations.
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