Exam 125: Drive Axles and Differentials

Technician A says most limited-slip differentials rely on clutches that connect each side gear to the differential case. Technician B says the inward thrust of the side gears increases as wheel slippage increases. Which technician is correct?

Technician A says the ring gear is attached to the drive shaft flange on RWD vehicles. Technician B says the pinion gear is attached to the drive shaft flange on RWD vehicles. Which technician is correct?

The spacer used on a drive pinion gear is used to properly position the gear so that it can correctly mesh with the ________.

Two technicians are discussing which lubricants are used in a limited-slip differential. Technician A says to use SAE 80W-140. Technician B says that most vehicle manufacturers usually specify SAE 80W-90 be used with or without special limited-slip additives. Which technician is correct?

Technician A says that if the backlash is okay, then the side bearing preload is also okay. Technician B says that a ring gear tooth pattern check will indicate if the drive pinion depth is correct. Which technician is correct?

What part(s) wears rapidly if a vehicle equipped with an open differential spins one wheel on ice or snow for an extended period of time?

What is being measured in this photograph?

Which component allow the rear wheels to turn at different speeds while propelling the vehicle?

Where are straight roller bearings used in a rear drive axle?

The drive pinion gear is positioned with a shim that is too thick. This will cause contact with the ring gear teeth too close to the ________.

Which of the following is TRUE of a vehicle going into a turn?

The backlash exceeds specifications. The technician should position the ring gear ________.

Technician A says a final drive ratio is a compromise between performance and vehicle speed. Technician B says a final drive ratio that provides a lesser top vehicle speed also provides for slower acceleration. Which technician is correct?

A growling sound is heard from the rear of a rear-wheel-drive vehicle during cornering only. Technician A says that defective rear axle bearings may be the cause. Technician B says that defective drive pinion bearings may be the cause. Which technician is correct?

What supports the pinion gear in the differential housing?

Technician A says that the convex side of the ring gear is the drive side on most rear axle assemblies. Technician B says that the convex side of the ring gear is the drive side on differentials used in the front of many four-wheel-drive vehicles. Which technician is correct?

Which of the following is TRUE of drive pinion mounting?

What gears produce the final drive ratio?

The backlash is less than specifications (too low). This will cause the ring gear tooth pattern to be too close to the ________.

What is the technician checking in this illustration?