Four wheel drive will shake when turning - Tundra Toyota Cars & Trucks

If all is fine when moving in a straight line - you are probably OK. Turning while in four wheel drive, especially a full hard over turn, puts a great amount of strain on the universal (or CV) joints of the steering axles. Although CV joints are smoother they too still have to supply power to the steering wheels at an angle while turning. If you have concerns about the CV or universal joints, jack up your vehicle, secure it with blocks at the wheels and put on jack stands, then inspect the joints checking for excess play. Rotate the front tires back and forth by hand while watching and feeling for unnatural movement or obvious broken joints. They may be difficult to see if covered with a rubber boot. If you do have boots, they need to be in good shape since they are designed to keep dirt out of the joint. If they are not in good shape, broken or split, they should be replaced. Let me know if this helps. Thanks