need some help guys as i'm clueless, mechanic change pump bushing and seal, changed the transmission fluid, drove the car a little, went to top up the fluid and now the car won't drive anymore. it feels like it wants to move since i can hear the change in engine when i shift through the gears. only 1 fault code 18265-P1857-load signal error message from ecu. need some help, tell me what to check, am mechanically minded but new the the b5

 

any and every advice is welcomed, live on a small island with no spare trannys and very little audi knowledge so replacement is a hard option. would need to import in that case.