I've been having problem with my old tranmission, the O/D light always been blinking everytime I drive the car, obviously the car doesn't want to move at all, so I purcahsed one from junkyard and replaced it myself. the current one on the car is little better, but now it make a alot metal grinding metal noise, it's coming from the flywheel and I"m not sure why, also the car sitll hestiate at 1k - 3k but after 4 k it's fine nothing wrong , let say driving on the high way 75 mph at 3.4k rpm is like a normal car, if I full throttle the car engine light will flash , and pulled a code 0302 . I reset the OBDII once in e while to see if the same code come back on again and it did. also it showed there's a problem with the split tq converter sensor problem code...... what is that????? i'm s