Transmission & Drivetrain Servicing Flashcards

What type of joint is typically used on the outboard (wheel) end of a VW front drive axle?

Answer: Fixed ball-type (Rzeppa) constant velocity joint

Outer CV joints are fixed ball-type joints that allow large steering angles.

A clicking noise while turning sharply under acceleration most likely indicates a worn:

Answer: Outer CV joint

Worn outer CV joints click under load at high steering angles.

Why should the drive axle hub bolt on a VW be final-torqued with the vehicle on its wheels?

Answer: Because the high torque can't be applied safely with the wheel hanging free

The high torque and angle tightening must be done with the wheel loaded so the hub doesn't turn and the car doesn't shift.

Many VW axle-to-hub bolts are torque-to-yield. What does that mean for service?

Answer: They must be replaced with new bolts when removed

Torque-to-yield bolts stretch permanently and must be replaced to achieve correct clamping force.

A customer complains of rattling at idle that stops when the clutch pedal is pressed on a VW diesel manual. A likely cause is:

Answer: Worn dual-mass flywheel

A failing dual-mass flywheel rattles at idle as its damping springs wear.

When replacing a clutch on a VW with a dual-mass flywheel, what should be inspected?

Answer: Flywheel free play/rotational play and condition against specs

Dual-mass flywheels must be checked for excessive rotational play and wear before reuse.

Inner drive axle joints on many VW front axles must allow plunge. Why?

Answer: Axle length changes as the suspension moves

Suspension travel changes the distance between transmission and hub, requiring axial plunge.