CV, Ujoint, 4x4
Tech A says some rotational slippage between slip joint splines is normal under hard acceleration. Tech B says there should only be in and out slippage between slip joint splines. Who is correct?
B only
The slip yoke (A) has external splines or (B) requires lubrication if it is not lubricated by the transmission oil. Which is correct?
B only
Four wheel drive front hubs may ______
be plain, without any disconnects have manual disconnects have automatic disconnects
Tech A says most drive shafts have a slip yoke and three universal joints. Tech B says a drive shaft may vibrate if the balance pads are missing off of the tube. Who is correct?
B only
A slip yoke is designed to slip when you have an overload
False
The splines on a slip yoke allow for the slipping of the drive shaft during heavy loading
False
A transfer case may provide ______
Four wheel drive, a nuetral gear position, lower gear ratios than normal
The two most common types of drive arrangements are the front-engine, rear-wheel drive and the _______
Front engine, front-wheel drive
The limited-slip transfer case differential limits the slip between the
Front wheels are rear wheels
Leaks in the transfer case may be caused by ______
Improper seal installation, loose bolts, leaking gaskets
Full time four wheel drive ________
Is never disconnected
Part time four wheel drive _______
Is usually disconnected when driving on pavement
The proper use of locking hubs on a 4wd vehicle.
Lessens vibrations, helps fuel economy, improves traction
If the shift lever will not stay in position, the trouble could be ______
Linkage loose or out of adjustment, missing detent ball or spring, gears worn or damaged
Excessive noise from the transfer case could be caused by
Low lubricant level, worn bearings, misaligned drive shafts
Tech A says nylon injection is a reusable method of retaining bearing cups. Tech B says Cleveland and Detroit style bearing cup retainers are the same. Who is correct?
Neither
Chain drive in a transfer case is ______
None
A 4wd vehicle may be shifted into 4wd
Only according to the owners manual
Universal joints or CV joints are used at the outer ends of the front axle shafts of a 4wd vehicle to allow normal _______
Steering Action
The first step to correct drive shaft imbalance is ______
To check for and remove all traces of undercoat and dirt from the drive shaft
A double Cardan universal joint has a centering ball in it
True
A two piece drive shaft will have a center bearing in it
True
CV-joint are referred to by position, function, and by design
True
CV-joints are used in front-wheel drive acles
True
Four-wheel drive front hubs may be plain, without any disconnects
True
Some vehicles may be shifted into four-wheel drive at any time
True
The basic need for universal joints is to let the differential change positions as the vehicle passes over irregular surfaces
True
There are a minimum of two drive shafts connected to a transfer case
True
The front-drive axle wear in the CV joints is often indicated by ______
Vibrations, steering wheel shimmy, clicking on turns
The Rzeppa CV-joint has ____ ball bearings
3 to 6
Tech A says 4wd mode in part time 4wd systems is designed to be used only when driving off road or on slippery surfaces. Tech B says 4wd units are dangerous on bad roads. Who is correct?
A only
Tech A says a cross-groove joint is similar to a Rzeppa joint. Tech B says a universal joint is similar to a Rzeppa joint. Who is correct?
A only
Tech A says a transfer case is an extra gear box on the back of a transmission. Tech B says a transfer case is mounted between the engine and the transmission. Who is correct?
A only
Tech A says an open (Hotchkiss) drive shaft must have a splined joint. Tech B says it must have differential slip joint. Who is correct?
A only
Tech A says hose clamps can be installed on a drive shaft to balance it. Tech B says hose clamps prevent excessive slippage. Who is correct?
A only
Technician A says the universal joint has a center cross with machined arms. Technician B says it has bearing cups that contain a set of ball bearings. Who is correct?
A only
CV-joint boots ______
Are designed to contain lubricant, must be replaced when punctured, prevent entry of dirt
All front-wheel drive automobiles have CV-joints. Tech A says most use a fixed inboard joint. Tech B says all use at least one plunging joint on each axle. Who is correct?
B only
Tech A says all universal joints come from the factory with a means to lubricate them. Tech B says some universal joints today do not require periodic maintenance. Who is correct?
B only
Tech A says it is okay to replace only the bearing cups when servicing a universal joint. Tech B says, in most cases, a universal joint is replaced as an assembly. Who is correct?
B only
Rear-wheel drive shaft vibrations may be caused by
Bent shaft, unbalanced shaft, worn u-joint
CV-joints are used in late model cars. Technician A says they are called constant velocity joints because their rotational speed does not change with their operation angle. Technician B says all FWD and some 4wd vehicles use CV-joints on the front-drive axles. Who is correct?
Both
Tech A says a common cause of wheel bearing failure is oversized tires. Tech B says a common cause of wheel bearing failure is substantially offset wheels. Who is correct?
Both
Tech A says a drive shaft may have two double Cardan joint. Tech B says a drive shaft may have one double Cardan joint and one standard universal joint. Who is correct?
Both
Tech A says a vacuum motor may be used to engage 4wd. Tech B says some pickups and SUVs have a vicious clutch in an AWD transfer case. Who is correct?
Both
Tech A says each universal bearing cup is equipped with a seal. Tech B says each universal bearing cup has a set of needle bearings. Who is correct?
Both
Tech A says hose clamps cannot be used to balance the drive shafts of some cars as the shaft should be replaced as specified by the manufacturer. Tech B says hose clamps cannot be installed if there is not enough clearance between the drive shaft and the tunnel in the floor pan. Who is correct?
Both
Tech A says most inner CV-joints are of the tripod design. Tech B says the tripod design CV-joint uses needle bearings. Who is correct?
Both
Tech A says seals that are incorrectly installed can cause a leak in a transfer case. Tech B says noises in a transfer case or a differential can be caused by bad bearings. Who is correct?
Both
Tech A says that a possible cause for a transfer case jumping out of gear is improperly adjusted shift linkage. Tech B says a possible cause for a transfer case jumping out of gear is worn or broken sliding clutch. Who is correct?
Both
Tech A says that if the thrust bearing races are installed in the wrong positions, a rattle will result in a Warner 13-50 transfer case. Tech B says sealing gaskets should be replaced when the transfer case is overhauled. Who is correct?
Both
Tech A says the mechanics style U joint bearing cups are held in place by metal locking rings. Tech B says some U joints are held in place by injected nylon locks. Who is correct?
Both
Tech A says the most commonly used type of CV-joint is the ball type. Tech B says it is the Rzeppa type. Who is correct?
Both
Tech A says the protective boot on a CV-joint prevents contamination of the joints lubricant. Tech B says the boot prevents the joints lubricant from being lost. Who is correct?
Both
While diagnosing the cause of noise from a transfer case , Tech A says a possible cause is incorrect tire size. Tech B says a possible is a faulty bearing or gear. Who is correct?
Both
The basic purpose of the universal joint is to allow the ______
Drive angle between two parts of the drive train to change
Front-drive axle CV-joints must accommodate changes in ________
Effective length of drive angle, suspension height, steering wheels left to right
To find problems in independent suspension drive axles, one must check for ______
Excessive looseness, damaged boots, lack of lubrication
