I am working on the wife's 2000 t&c 3.8, awd, it has developed a vibration under acceleration, & suspect half-shaft may need replaced. however the parts store shows 2 different half shafts, 1 for 2wheel abs, another for 4 wheel abs. how do you determine for sure which you have?

I found the answer to my own question, My van apparently has 4 wheel abs in addition to awd, the 4wheel abs has reluctor spokes cut into the outer edge of the cv joint, for a speed pickup to read.
Now, the next question is changing the half shafts on a awd T&C /Caravan pretty straight forward, or do I need to remove any covers& pull retaining clips?