Just completed the dreaded intake manifold job on my 5.7L gas engine. All went well. Engine started right up. But now have a hard clunk in the drivetrain between 45 -60mph. (Trans if the 4L60E with 2 speed active transfer case) Usually happens right at 52mph as I am gradually accelerating but will also do it when I get up to that speed and then slightly let off the gas. It is one quick hard jerk. It almost feels like it is trying to go in reverse. It happens in 2WD or 4WD. Also happens if I'm in 3rd or Overdrive. The Check Engine Light is on. I've tried disconnecting the battery to reset the computer. There are two sensors on the throttle body. Could one of those cause a drivetrain condition?