2. PURPOSE
Allows flexing of the driveshaft due to suspension
movement.
For better torque transmission at different angles
and heights
3.
4. TYPES OF UNIVERSAL JOINTS
• Variable velocity joint
I. Cross or spider type
II. Ring type
III. Ball & turnion type
• Constant velocity joint
I. Rzeppa
II. Bendix weeiss
III. Tracta
5. CONSTRUCTION
A steel ‘X’ with each end precision
machined.
Bearings caps with small needle bearings
fit over each end.
Grooves for retaining rings are cut into
each cap.
A grease fitting is fitted to allow for
regular lubriciation.
6.
7. LOCATION
One universal joint is attached to the driveshaft at
each end.
The front u-joint is also attached to a slip yoke which
fits into the tailstock of the transmission.
Some heavy duty vehicles with a two-piece shaft
have three u-joints
Some older 4 wheel drive vehicles have a u-joint at
each front wheel also.
8.
9. PROBLEMS
Universal joints wear from high mileage and a lack of
regular lubrication.
Dry u-joints rust and seize, causing noises and
vibration.
Excessively worn u-joints can break, causing costly
damage.