I have a 1990 toyota 4x4 extended cab deluxe pickup 3vze engine automatic trans .The front passenger wheel shimmys real bad at any speed over 40 mph. Could this be a front wheel bearing going out .When i jacked op the front end every thing still feels tight .I replaced the tie rod ends theball joints the idler and pitman arms and the front stabilizer shock and it still does it ?

Hi, definitely check all the steering components & alignment. I've found when I've been 4-wheeling that mud sometimes gets inside the wheel rim and throws the balance off, and it may also be as a result of cupped thread in the tires. An easy way to tell if its the tires is to swap the front and rears. if the steering wheel shakes its the front tires, if the whole truck shakes its the rear.