I was driving my car late last night when i was at a stop i shift into first (automatic) i decided to give it a bit of gas not full throttle and then i aggressively shifted into second unsure when i heard a loud BANG my car started to splutter and lose throttle and the Check engine light came on. I pulled over and the car sputtered and died so i went to investigate and didn't see any oil or fluid leaking from underneath but i smelt a burning of some sort maybe clutch? After i pushed it home i tried to turn it on the engine light went away but it now has some sort of lumpy idle like BRAP 1 second BRAP 1 second this happens in neutral drive reverse and first gear anyone have suggestions or theory i am thinking a blown gearbox? but would that cause the weird lumpy issue thanks.
TLDR shifted aggressively in an auto heard a bang now car is lumpy in gears and idle