Ok, had shifting issues tonight. Barely made it home, flashing D and CEL upon pulling into driveway. Codes are P0780 and P1735. I check transmission dipstick and fluid is right at the bottom of the XXXs. It’s brown and yes it smells burnt. I did a drain and flush a few thousand miles ago along with filter so this is shocking. I then jack up the car and see what appears to be trans fluid leaking out of this small shell piece with 3 bolts. It’s still very hot so I have left it for now. Can someone tell me what this shell piece is? And if it is indeed removable? If so, is this known to leak? What can I expect to find upon removing it?