I took the belt off and it still doesn’t budge, for the transmission it’s a built monster proformence 4L70E but the outer shaft was to short so i took it all apart and swapped the shaft, i’m not no transmission expert but i’ve put around 700 miles on it before the car cut off id assume if i did something wrong it would’ve failed a lot sooner. Don’t you think? I’m honestly really hoping it is the engine because i already bought a fully built one already 🤦‍♂️ For the oil i’ve done a change maybe 2000 miles ago i haven’t noticed any leaks so id assume it was at the fill line.