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Repair Topics / U-Joint
Problems
Car U-Joint Problems This
category contains featured questions as
examples. They relate to most vehicles.
Question:
1999 Chevrolet Tahoe 4X4, mileage: 125,000.
I am an ASE CMAT for 20 years and I just
bought a used but cherry Chevy Tahoe 4X4. I
completely serviced the vehicle but was
puzzled by the strange plastic plugs on the
drive shaft u-joints. Three U-joints have
strange plastic inserts on one side of each
bearing. How are these lubed? Do I take the
plastic inserts out or use an injector tip
over them? If removal is necessary, is there
a procedure? I am unable to find any
reference to these strange plastic inserts
in GM TSBs. I am not a GM brand tech but
appreciate its strength and many design and
construction methods. Thanks very much for
your help.
Answer: Plastic plugs
on the u-joints, are used by the factory to
assemble the u-joint by injecting epoxy to
hold the u-joints together. You will notice
there are no snap rings on the u-joint cups.
The u-joints do not require lubing, press
apart to replace when failed.
Question: 1999
BMW 528i mileage: 154,000. How
difficult is it to change a flex-joint in
this vehicle, and are there any difficulties
I need to look for?
Answer:
If you have changed drive joints before on
other cars, it is not very difficult.
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Repair Topics / U-Joint
Problems
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