Mechanics

SHUDDER

2000 Lexus LS 400

Shakes or Wobbles problem
2000 Lexus LS 400 V8 Two Wheel Drive Automatic 103567 miles

Thanks my lexus has a shudder from about 35 to 43 mph, I am a ase cert tech with 10 years gm exp and 20 yrs honda exp. I have done all basics, tires, wheels, mounts. This car is killing me, engine on or off it shudders when you enter the 34 to 43 mph range on accel as well as coast down. It is dead smooth above or below this speed. I installed another drive shaft - no improvement, conditions gets more pronounced as ambient temp goes down. I WILL DONATE MONEY IF YOU CAN HELP THANKS JIM
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Jim trebonsky
January 9, 2010.




Jim and samslam, have you checked the axle bearings? Or the ring and pinion for alignment issues? Maybe a loose U-joint? Or a U-joint cap missing a needle bearing or two. Double check the rear shocks, leaf springs, etc. Make sure you aren't experiencing a tread sep issue, or a tire cupping issue.
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Rivermikerat
Jul 25, 2012.
Jim and samslam, did you guys every find out the problem with the vibration? I have the same issue. It gets worse when the weather gets colder.

Tiny
Ctuba
Feb 11, 2013.
Ctuba, have you had it in a shop and had them pull ALL codes, both hard AND soft? Soft codes don't cause any of the lights to come on, but can reveal problems.

Rivermikerat
Apr 4, 2013.
Hi Guys
I had a similar problem with an SC400 and it turned out to be the type of ATF that had been used in the transmissio. You must use Toyota Genuine ATF Type IV to ensure that the vibrations are removed. If you've used Dexron or similar you may need to change it a couple/few times to remove any trace of it.
Best of luck.

Tiny
Smokey2705
Apr 10, 2013.
Thanks for the heads up there Smokey. Hopefully the guys having the problems will see your update.

Rivermikerat
Nov 9, 2013.
I had a similar experience with an SC400 1994 model. After a lot of testing etc I found that the use of Dexron automatic transmission fluid was the culprit. Toyota/Lexus have specified a particular type of fluid and that only can be used. Try changing the fluid with Type IV from your local dealer, drive it for a while then change it again to try to get as much of the Dexron out of the system. It worked for me.

Tiny
Smokey2705
Nov 9, 2013.

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