Question about 2003 Lexus GX 470

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My Lexus starts bouncing around like you're riding a horse. Starts of mild and gets really bad. Then it stops for a few days and starts again. Took it to the dealer and they couldn't find the problem. Please help!

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Could be the tires, or the road you travel on

Posted on Mar 21, 2011


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My GX470 Lexus is bouncing bad, like riding a horse. Took it to the dealer several times and they couldn't find the problem. Anyone know how to fix it??

Usually any uncontrolled oscillation like bouncing is caused by a bad shock absorber (or a broken one). Have them look for broken mount / perch or whatever they may call it. Could also be a broken shock rod.

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A few days ago my car wouldn't start and just made a clicking sound. So I assumed it was my battery, I got a jump to get home and it took about 2 jumps and then my car died right by my house. I took the...

While your car is running, measure the voltage at your battery terminals. If the alternator is wotking, it should measure over 13 volts, since the battery is really low. On a healthy battey the voltage is around 14.5 volts when the engine is running. If the car is running and you measured 12.6 volts or less, change the alternator. I have actually worked on a lexus ls400 with exact same problem. I had rebuilt the alternator myself to save the customer on parts. Because altenator is not cheap on lexus. There is an ace hardware by my shop where they carried some carbon brush, all you got to do is file it down to fit, and solder them. Of course you have to open the alternator to do that. The brushes cost about a few bucks. You can buy these at auto parts too but not for that particular alternator. Auto parts like to make money and would rather sell you the whole thing. LOL

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Noise is not a danger, but if the car starts to bounce allot then it becomes a safety issue, at that point the struts have to be replaced, they must be done in pairs only..

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1 Answer

Truck starts bouncing when you drive at take off and 60 miles hour speed

You probably have bad shocks. Check them by pushing up and down on the bumper and let go. Good shocks will make the bounce stop after a few times. Where as, bad shocks will keep the bouncing going for a while.

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Use on of those quick freon kits that come with the fill tube and gauge. It sounds like you have a slow leak and on a hot day there is enough pressure in the system to trip the switch. If thats not the problem check the wiring coming from the switch. The switch is probably near the filter/dryer. Thats the metal canister that sweats liquid on a hot day.

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