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This is my first lexus and I am used to buying chilton or haynes books for my used cars. I just bought a 91 ls 400 and can't find one by them. Baffling me. I also haven't been able to find any used service manuals. Don't understand why its so difficult to find decently priced manuals for such an old car. Can anyone help as I prefer to do as much repair work myself as possible as I am very budget minded..lol.

There's also a Russian indie Lexus shop that has the TIS pages online: http://www.ls400.ru/lexus-89-2000/ Menu pulldowns and TIS pages are in English, thankfully. -Paul

Hi Nate, welcome to the club.. do like Richard said and check out http://www.lexls.com/ and read up,

You can get invaluable info at this link. http://www.lexls.com/ The above link is by far the most complete tutorial for the jobs that it does list. He deserves any donations he get. There is also a non-US guy that will sell you a download of the complete manual for about 7 bux. I found it on ebay I think. Anyway it came thru complete but lacks some indexing so you have to do a bit of searching for what you need. That guy's address is. fahad.victoria@gmail.com I think this may still be a valid addy. Drop me a line in mid Nov. if you have no luck, will be at my winter home then and have more info for you. Dikwag at gmail dot com R. Clikdik

the pdfs are posted on Page 19, thanks to mann777, It took me well over 90 minutes to read from start to end ( all the posts of this thread). So, I am including the pdfs here anyway if anyone reading random pages. I too have both Clunk issue and 55-75MPH vibration issue on my '07 GX470 with 54K miles on it(just bought pre-owned from a remote non-Lexus dealer), hoping mann777 posted TSBs will fix my issues. I will try to call the local Lexus dealer tomorrow and see if I can get them fixed. I hope mine are covered as the TSBs say 72K or 7Years(72 Months). and couple of questions about the vibration TSB, does it have to be under the floorboard because in the TSB in mentions under diagnostic procedure that," Confirm customer complaint of vibration/drone felt in the floorboard or seat between 55 -- 75 mph by test driving the vehicle and note the speed range in which the vibration/drone occurs." I am not quite sure if I feel under the floorboard but my steering vibrates/vobbles like anything between those speeds, I feel like the whole car is vibrating. I feel this vibration in my car is between 60-75MPH, does that mean I have both the problems mentioned in the TSB, i.e. 55-65MPH and 70-75MPH, ? and why is 65-70MPH not covered in the TSB? I think I have the issue between these speeds too I guess. is there any chance that they may deny as not being the floorboard and classifying as a different issue and try to rob me? Thanks in advance. CLUNK_TSB_2008.pdf Steering_Drive_Line_Vibration_issue_Feb_2008.pdf

Not really. The clunk, in essence, is simply the slider sleeve of the driveshaft sticking in a forward postion from it's seat against the rear differential. The "clunk" you feel, is when that slider sleeve releases and hits against it's seat. That is the core of the clunk. Now, lexus has also added updated rear cushion bushings in some of the rear suspension components to help as well. But at the end of the day, it's a sticky driveshaft slider yolk. The 4runner guys, me included, simply go buy a $20 grease gun and a tube of Mobile One Synthetic grease, and "inject" it into the greasing points of the driveshaft every so-often "usually around 5-10k miles, depending on how bad it is". This temporarily fixes the slider sleeve from sticking, and it seats correctly, but it's only temporary. Think of the drive shaft as an accordian, which expands and contracts with the travel of the rear suspension. The lower the suspension, then the short the distance from the rear differential to the center differential "the two connecting points of the driveshaft". In that, there are parts that are supposed to slide back and forth in concert with the movement. Sometimes some of those parts get stuck, and "clunk" when they release. This driveshaft is the same setup that has been used for years across the Tacoma, 4runner, GX470, and quite possibly the other rear wheel drive truck-based vehicles of Toyota. But to answer your question, you can see where the variable height setting could be considered a problem, as it will adjust that distance bewteen the center diff and the rear diff, causing the drive shaft to expand/contract. But if you asking the advice to replace variable height sensor to fix it is correct, then I would have to disagree.