shadeelocc Posted December 7, 2008 Share Posted December 7, 2008 Okay, I purchased a 1999 lexus sc300. the seller told me the vehicle had a steering wooble at 70 or so mph. He and myself agreed that it was an alignment problem. I had an alignment and a tire balancing done, but even after that it still wobbles at 70mph. What gives!? Quote Link to comment Share on other sites More sharing options...
shadeelocc Posted December 7, 2008 Author Share Posted December 7, 2008 ...ANYONE!? Quote Link to comment Share on other sites More sharing options...
sc300newbe Posted December 8, 2008 Share Posted December 8, 2008 Check all the bushings, ball joints. Like the steering rack, upper and lower control arms, Wheel bearings. The easiest way to check the bearings is to lift the car up with the tires still on push and pull on the top and bottom of the tire. If it wobbles at all then the bearings are bad. Quote Link to comment Share on other sites More sharing options...
Cwallbball10 Posted December 8, 2008 Share Posted December 8, 2008 Also make sure you don't have a bent/warped rim. Bad tires with uneven wear can also cause vibration at various speeds. Quote Link to comment Share on other sites More sharing options...
York Posted December 12, 2008 Share Posted December 12, 2008 I had the same vibration issue, and had the wheels/tires balanced again, but it did not stop. Installed new tires yesterday and the vibration is gone. How old/worn are the tires on your car? Quote Link to comment Share on other sites More sharing options...
shadeelocc Posted December 13, 2008 Author Share Posted December 13, 2008 yeah my tires in the rear are a lil worn..i'll replace them and see how they work. i appreciate the feedback! Quote Link to comment Share on other sites More sharing options...
onemangang69 Posted January 4, 2009 Share Posted January 4, 2009 My SC400 also have the same problem, I finally notice one of my rear wheel has excessive brake dust. The cause is one of my caliber is bad and it lock up the rotor. So cjeck all your brakes caliber and make sure they are all ok. Quote Link to comment Share on other sites More sharing options...
longball425 Posted April 16, 2009 Share Posted April 16, 2009 My SC400 also have the same problem, I finally notice one of my rear wheel has excessive brake dust. The cause is one of my caliber is bad and it lock up the rotor. So cjeck all your brakes caliber and make sure they are all ok. motor mounts and transmission mounts Quote Link to comment Share on other sites More sharing options...
whitesnake SC400 Posted April 16, 2009 Share Posted April 16, 2009 It could be brake calipers. They do not fully release rotor, then after driving at high speed it heats up and starts vibrating. Check if one of your wheels becoming warmer than others. Quote Link to comment Share on other sites More sharing options...
longball425 Posted April 21, 2009 Share Posted April 21, 2009 motor and tranny mounts....all day long Quote Link to comment Share on other sites More sharing options...
cactuseater Posted April 25, 2009 Share Posted April 25, 2009 In addition to checking mounts, etc., make sure that the dude spinning your wheels is using a high speed spin balance. Most shops run them up to about 40-45 mph and send you out onto the road. That's OK for most cars, but I have noticed that Toyota (Lexus) products have limited tolerances for these things. Up to and including front end alignment - make sure they know how to work on this brand...it's a different animal. Insist they speed up on the machine for your balance. Run if they tell you they can bubble balance them! Quote Link to comment Share on other sites More sharing options...
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