Worn CV joints can act many ways depending on the wear and harmonic frequency of motion. You may have felt them because you were at just the right rpm and just the right point in the wear area and the internal roller bearings were locking at just the right point. I would be that if you felt of the CV joint after those things were occurring it would have been very hot. Then today those same bearings have actually cooled down and because of the heat, grease had gotten hot enough to flow into them and they freed up. I would also say that you are on very borrowed time and that those vibrations do signal that it can come apart at any time.
If the parts prices are an issue go to RockAuto and you can find re-manufactured Cardone axle shafts for around $50.00 to $70.00 plus shipping. But then you either need to install them yourself or find a shop that will install parts you bring them, some will many will not.
Sunday, December 24th, 2017 AT 10:53 PM