2004 Lexus es330
 

Hello. I have a 2004 lexus es330. It came with a
3.3 liter motor. The person I got it from put a 3.0 motor and trans in it and it is currently ran off the original 3.3 computer. My problem is the trans just stopped working. It doesn't go in gear, doesnt move. Nothing. I literally got in it one day and stopped working at a stop sign. No slipping no problems, no signs of any problems. Is it coincidental the trans just went unexpectedly or is it a computer issue? Thanks for any help to point me in the right direction.