Either you've dislodged/lost a roller - which is a bugger.
Or, more likely, you've got one or more bearing caps pushed on too far. This is easier to fix. When I did mine I pushed all caps in as far as they would go, fitted the circlips then rested the whole lot on the floor with the cap downwards and ****ted the shaft with a mallet to push the cap back out flush onto the circlip, repeat for the other three...when finish it should be very nice and free and flop about like a rag-doll's head...
Thing that surprised me is that I'd driven a good few hundred miles and passed an MOT with the old UJ's completely shot with no bearings left - apart from a slightly "funny" noise when in 4wd or with hubs locked no ill effects!