I have a 2006 Limited Sequoia, 265k and runs great in 2WD. First problem... No indicator lights on dash for 4x4. I have to reach under and spin the front shaft to make sure its not engaged. Also, you can't use the cruise cont. while in 4 high, that's another way to check to see if your in 2 or 4 hi. Problem #2. When I put it in 4 wheel drive, my traction control light flashes when I begin to accelerate. Any help would be awesome. I already pulled the cluster to check for any visible damage, found none. When I bought it, I had to replace the actuator at the transfer case. Not easy when you have lockers... I thought maybe a ABS sensor? Just replaced both front wheel bearings, new suspension, 4 inch lift. 35 inch TOYO tires. On another note, I removed the resonator and had a magna-flo muffler put on. Sounds great! Cold air intake as well. I'm getting about 12.2 MPG around town.