After replacing the TPS and Cleaning the hell out the IAC and TB and letting it dry, I seem to get a vibration from the transmission housing, but only when the car is in gear. Park or Neutral and it goes away. Its on a 2000 XJ. Im stumped. Does the TPS or IAC have any effect on the transmission? Someone told me to check the torque convertor bolts. Are there 4 bolts on the outside diameter of the flexplate? Do those normally come loose. If so, could that be the vibration I feel?
Word of note, when I was cleaning the IAC, I turned it out of adjustment. It still idles just fine at around 600 or so. Could turning that IAC cause the vibration im feeling. Only reason I ask is cause it started after that happened. Is there any connection between the IAC and transmission?