Car died on me when slowing down and entering gas station. Now won't start

While driving I slowed down and car died on me. Shifted it to park then turned key it started. Next time does same thing and when I turn it on and put it in drive awful sound comes from front passenger. I just had starter, battery & alternator checked when it happened the 2nd time. The noise was from a part connected to the transmission that had no grease and the bearings were gone. Best thing to do was change the whole transmission, which was done. Went on a test drive for 20 minutes and it shifts good as new. As I pull into a gas station dies and refuses to start even with a jump. Car won't crank or turn over. Changed fuel pump 6 months ago and changed axle and rack and pinion less then a month ago, on top of work just changing the transmission. What could be the problem? Thank you in advance for any answers or suggestions you may have.