no engine or clicking noises...only sounds overall louder like race car.I might have your same problem, does it make any clicking noises combine with a rattling noise similarly to what you would hear if you set a handheld back massager on a cherry wood tabletop on the 3rd floor of a library? :lookout: cause that's where I'm at :-(
Thoughts are good at this stage...thanksif there's no codes and the motor is running fine then it does sound like your trans. To make it run that rough it would have to be throwing a code of some sort if it was the motor. Just my thoughts.
I will try the neutral idea...I'd be checking the trans fuild. Does the vibration stay if you put the trans in neutral while idling?
Could have put the wrong weight of fluid or over filled with fluid. Thats were I would start if you don't have any engine codes.
Your comments sound like real possibilities...i would hope that toyota svc would know the right size cat but you never know. As my 4R ages, there's a lot of the deteriorating of parts that i'm finding myself replacing. The trans fluid color was deep red & a hair below the line on dipstick (and really hard to put back in-twisty turny). Would any of these items you mentioned make the 4R feel like it's dragging? I have to push the accelerating down much harder...it's much noticable then several weeks ago & it was when I noticed this that the vibration occurred.I would suggest having someone check the welds on the after market cat and check the cat itself to make sure its the correct size. I would also check the transmission mount and crossmember along with the engine mounts. 3rd gen t4r transmounts are notorious for having the rubber deteriorate and excessive vibration at that point can lead to extra stress on the crossmember. the crossmember rarely needs replacing though (but Ive seen at the dealership I work at). Also at the dealership Im at, we see alot of trans mounts go bad, I would say 20 bad trans mounts for every 1 bad engine mount. if your t4r is an automatic, even though it was recently flushed, check the trans fluid to see if their is any discoloring, metal shavings, or funny smells. with less than a few thousand miles on fresh trans fluid it should still be red also check it to make sure the trans is full. also, you mentioned a cv boot (im assuming its 4x4) check the condition and level of the front and rear diff gear oil.