Hey, just replaced the tranny in my integra. . . Its a 96 Ls sedan, but the motor is out of a 99(at least the block) and just put in a tranny out of a 98 last week. . . All was fine until today, heard a funny muffle sound from my exhaust and then a weird rattling sound when I pressed the gas. . . car still drove fine as the sound was only there on the initial take off up to about 40mph after that you don't hear anything. Well stopped at the light and when I tried to go, the car just revved and would not go into gear. . . then it just shut off and would not start. . . when I turn the key it sounds like the starter is just spinning in place, but the car wont start. . . Any suggestions as to what the problem could be? ? ? like I said, the car ran perfect until today. . . no clue what the issue is. . .