How do I determine whether it is an inside or outside joint.
I am hearing some shuddering when going into a right hand turn or bend, especially if I'm giving it gas like entering and interstate ramp.
I don't hear the traditional clicking like when you make a sharp turn in a parking lot etc., so I'm thinking it may be the inner joint. But I'm not sure how to tell whether it'* the left or right side.
This is for a 2003 Buick LeSabre
Have you inspected the boots for a visible tear? Without a tear and the grease leaking out it could very well be something else. I suppose you could put the front end on jack stands and chock and e-brake the rear wheels to listen for a problem while someone has the car in gear and turns the steering wheel, but I'd highly suggest you take it to a reputable shop where they can put the car on a lift for a diagnosis, much safer.
No real noise to speak of, just a shuttering, vibration.
Was hoping that there would be a rule of thumb, i.e, vib when turning right= left axle.
That would probably be true if it were the outer, not sure if it applies if it'* the inner.
Of course I will replace the whole axle, just have to know which one.
I suggest you do the parking lot thing like suggested above. Listen for which way the sound sounds slower or faster. If the sound is faster testing in a left turn then look at the right side. If it is faster in a right turn then look at the left side. Full lock each way should easily create the sound if it is the outer CV, or halfway if a bit more speed is needed.