LS - 1st and 2nd Gen (1990-2000) Discussion topics related to the 1990 - 2000 Lexus LS400

Rear Drop in Normal Mode

Old 06-02-09, 01:27 PM
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rws371
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Default Rear Drop in Normal Mode

HI, I have a 1990 LS40 with Air Ride. The problem is that while I am NORMAL mode the rear end sags after about 10 minutes when engine is off. Yes! Both sides. Front is normal. However, when the switch is set to HIGH there appears to be be no problem. No drop after 48 hours.

Any ideas why ONLY the back end deflates? Why both at the same time versus just one. Also, why is there no problem when set on high mode?

What should I check? Replace?

Thank you!
Old 06-03-09, 08:51 AM
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acidfire52
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Your air shocks are leaking. Pretty common problem. You can replace them individually, or replace all of them and go to struts.
Old 06-06-09, 04:58 AM
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rws371
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I figured as much...The left rear goes first than the right. Are these connected some where where if one leaks the other leaks through the same air line.

Also, as a final test could I inflate them and "clamp" the line? If they did not leak then a controller may be a problem if they leaked I could prove the above theory,

Anyone have any feedback on the replacement struts? Versus Air?

Thanks
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