I have a 1999 4runner limited i've noticed lately that the front end swerves back and forth at speeds of 60mph or above. Also, the steering wheel pulls to the right and left depending on what tire is hitting bumps, potholes, ect... There is no abnormal noise, and I checked my tire pressure.
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Swerving not related to driver's use of alcohol usually is caused by bad or maladjusted front end parts. Have helper turn steering wheel back and forth just a little and you look under car for parts which move well and those which don't. If you find nothing loose, check ball joints or have them checked. Also check shocks and sway bar end links.
due to the awd you cant just jack up each wheel and spin it . when i road test for w/brg noise you listen for a slight whirring hum that increases and decreases with speed or sometime as you swerve back and forth you hear it as the vehical weight shifts side to side (right swerve left w'brg left swerve right w'brg) as a rule but not always . have a passenger sit in the back to help verify front or rear> dont guess and just replace one . w'brg's come in three flavors cheap mid grade and premium.
the labour to change is the same. my advice dont end up paying for the labour twice buy the better or best , cheap parts cost more in the long run!
Could be the rears ,locating wheel bearing noise is a difficult job and even with 45 yrs experiance i still get it wrong ,ALSO I HAVE NOTICED THAT IT PAYS TO FIT ONLY SWEDISH OR GERMAN bearings even british but a lot of the spares coming in are cheap but made in china need i say any more ,your noise is definatly wheel bearings but i do feel it could be the rears and i would suggest that take an old time truck fleet fitter and sit him in the back and go for a drive ,if any of us old codgers are still alive that is
sounds as though you have play in steering gear box- most of the time thier is a lock nut on top with a slotted screw in middle loosen lock nut and tighten screw then reset lock nut. do not over tighten slotted screw in fact tighten and then back off half turn so steering box is not too tight.
Check ball joints and tie rod ends for play. Jack the truck up on the frame and try to move the wheel up and down for ball joints and side ti side for tie rod ends. Also make sure you check the idler arm on passenger side and pitman arm on steering box. None of the parts should any play whatsoever. If there is any play in them when you try to move them then replace them.
There could also be excessive play in the steering box but that shouldn't make it swerve back and forth. That would just let it wander to one side or the other until you corrected it by turning the wheel. Hope this helps.
There is a wheel bearing inside the hub as well. They will sell those bearings I've bought them before. Chances are you need to talk to a better parts guy. You can tell if it's a wheel bearing by taking the vehicle up to a speed where the noise is clearly audible. Then swerve the vehicle back and forth in your lane. If the sound changes or goes away when you swerve, it's a wheel bearing. Obviously we're not trying to crash the vehicle here, so don't get over aggressive with the swerving.
Hello, from the sounds of it you have a wheel bearing out. One way to usually verify that it is a wheel bearing is to drive down that road and swerve side to side to transfer the wieght of the vehicle back and forth. If it is a wheel bearing you will notice a change in the sound. If you hear a change in the sound figure out which side it is coming from. If when you swerve right and it's louder or makes more noice then it will be the left bearing and vice versa.
One of the front wheel bearings are bad. Jack it up and see if one is loose, the noise will usually change if you swerve back and forth while driving. Could also be a rear pinion bearing in the rear axle.