My97Maxima

Just today I noiticed that my auto 97 Max with 62k is making a clunking sound when placing the car in gear. I can also hear the same sound, not as pronounced when the trans is shifting and downshifting. I can really hear it when coming to a stop as the car is shifting into 1st. Any ideas on what this could be? Shifiting is a bit harsher but not much. I really can't feel the trans slipping either. I did have the trans fluid changed before 60k.

TIA