I was wondering If anybody has done this or heard of it being done. I love the 4-speed auto in my 06 tacoma 2.7. The shifter is great for shiftimg manualy and the trans is quick to respond to the shifter. I figured the 5- auto would be simular and give you a higher final drive than the stock tranny. I would love it if my supra shifted as well as my work truck.