While driving on Hwy at a speed of 70 mph started to lose speed, so as driving off Hwy to get to service rd the vehicle completely lost power. So I then placed in park and began to crank vehicle again which had no problem doing alternator, battery, starter sounded great, but when proceeded to put into gear I heard a rattling noise for about 10 seconds and when in drive completely and pressed the gas pedal vehicle would not move. I checked the oil, gas, heating pressure gauge and everything was okay. What may be wrong with this First American Made Vehicle ever driven by me?