Alternator 2006 Dodge Ram 5.7

Has anyone had problems with theirs? My truck has 82k and it sounds like the bearings or the armature is going out of my alternator. It makes a grinding sound. At first I tried changing the idler and tension pulleys since the bearings seemed worn(and it was cheaper to replace), but it still grinds. The alternator still charges, but I can't stand that noise anymore. At any rate, is there a way to tell what amp the alternator is? Thanks

I have seen the bearings fail with as little as 50k on them and have seen them go 300k and still be good.The alternator should be a Bosch rated at 136a. Remove the alt. and take it to a local auto electrical shop(alternator & starter shop)and have them replace the bearings.I usually charge 50.00 to replace the bearings.Hope this helps Jason