Strange vibration, worse when throttle depressed
#1
Lexus Test Driver
Thread Starter
Strange vibration, worse when throttle depressed
I've got a strange vibration that occurs between speeds of 45 through 65 miles an hour. It may be present at other speeds but in a much lesser form. The vibration is there when the car coasts, but becomes worse when the throttle is depressed, and the harder I press it, the worse it gets. It is not RPM dependent as it does not occur if the car is in 3rd gear or at lower speeds. I had the wheels balanced at Firestone in an attempt to solve the vibration but it had no effect. I intend to take the car back but I'd like to hear your thoughts on what it may be so I can point them in the right direction if needed.
Scott
Scott
#2
I have also felt that vibration in my 92 but mine only occurs around 40 and does not get worse(only slight, not glass like smooth). I have always wondered about this as well. I had the car checked by several mechanics, including Lexus and nothing was found. Anyone with any ideas???
#6
Lexus Test Driver
Thread Starter
Well it's unlikely to be alignment or balance-related. I just went back there to have them double check both and they both were in-spec. I guess the next item to look at would be the transmission mount.
Scott
Scott
#7
Originally Posted by sonyman
Well it's unlikely to be alignment or balance-related. I just went back there to have them double check both and they both were in-spec. I guess the next item to look at would be the transmission mount.
Scott
Scott
I would have the tranmission mount checked and also the drive shaft bushings. could be either of those.
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#9
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Hey all, I had a 98 LS400 that vibrated at 80mph almost without exception and no one could figure it out. First I had broken engine mounts, "sure to fix it" they said. It didn't. Then they said it was the tires. Bought top of the line, V-rated tires, still didn't fix it. Then I was told it was the rotors... nope, also didn't do it. After all that, the vibration was considerably lessened but nonetheless remained. How freakin' annoying!
Anyway, I just changed to a GS430 and consequently was reading that forum when I came across this vibration issue. They've come across a solution - tighten the steering pretensor arm (I have no idea what that is or if I spelled pretensor correctly). However, it might be worth your while to check out that forum (GS - Second Generation) and see if their issues seem to ring true with yours. They sure did with me regarding my old LS400 (which, aside from the vibration, I loved)
Anyway, I just changed to a GS430 and consequently was reading that forum when I came across this vibration issue. They've come across a solution - tighten the steering pretensor arm (I have no idea what that is or if I spelled pretensor correctly). However, it might be worth your while to check out that forum (GS - Second Generation) and see if their issues seem to ring true with yours. They sure did with me regarding my old LS400 (which, aside from the vibration, I loved)
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