Question about Lexus RX 300

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Lexus RX 300 - AWD (1999) SHAKING and Pulling

My Lexus RX 300 (1999 - AWD) I at about 155,000 miles. Just last year, at about 148,000 I had to have the transmission rebuilt (ouch)! Now, I've been having problems with the car shaking when I accelerate. 2) Sometimes the care will jump while I am stopped at a light and then it begins to shake. 3) Sometimes while I am driving on the highway the car shakes. 4) The engine light is on and remains on constantly now. 5) The main seal gasket is leaking and was leaking when the transmission "guy" pulled it out. But he did not have the sense to change the gasket or tell me it needed replacing at that time! So, I have a constant oil leak. 6) A mechanic recommend I add 20-50W oil, which is not the Lexus recommended oil for this vehichle. This shaking problem occured within a couple months of me adding this oil, but it may / may not be related. Please help me determine if this car is worthy of any more repairs. Is my car possessed by demons, stressed, ready to be retired, or salvable? I don't want to invest more than the car is worth (I am already in for a few thousand $$ because of the transmission repairs I've made). Again, what is the cause of the problems and are they worth fixing?

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This could mean a lot of thing, 1.) possibly you wheel bearings could be going out. 2.) your break rotors and or brake pads could be shot. 3.) the transmission is shot but if you just had it rebuilt i can't see that being the case.

Posted on Feb 18, 2012

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Well, let me just say that if you have gone 10,000 miles without servicing your brand-new Lexus, you are a LOT braver than I would ever be. I certainly do not have the gold available to pay for the possible consequeces of pulling that one off. When was the last time you even checked your engine oil level? I have seen MANY vehicles run completely out of oil between 3000 mile services and completely DESTROY the engines! 10,000 miles is REALLY taking HUGE chances!

You may have 2 separate problems...One for the oil needing service and one for a problem with your AWD system. However, Toyota and Lexus are known for disabling things like AWD, ABS, Traction Control, etc. when the engine computer detects things like low oil pressure or low oil levels. This can cause several warning lamps to all come on at the same time.

GET YOUR VEHICLE SERVICED!!! Hopefully, you will be one of the lucky ones and have not done any serious damage by not getting it serviced when you should have.

Your oil should be changed every 3000 miles (Or every 5000 miles if you are using full-synthetic oil). You should also check the oil level between services AT LEAST every 1000 miles (or more often, if you are having to add oil at 1000 miles). For a properly maintained vehicle, checking the oil level between oil changes SHOULD seem a total waste of time. However, it is the single, MOST IMPORTANT thing you can spend your time on when it comes to getting a lot of miles from your investment. If your engine starts using (burning) oil or if it starts leaking oil, you will not know about it in time to save your engine if you are not in the habit of checking it on a regular basis.

Jan 15, 2012 | 2011 Lexus RX 350

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alot of variables here to make a valid suggestion, my recommendation is to pay a shop to hook to the diagnostic computer to eliminate possible causes. Instinct tells me valves are out of adjustment or injectors partally clogging, like I said , too many variables..

Oct 01, 2010 | 1999 Lexus RX 300

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by 80,000 miles is a good time along with a new water pumo since its right there with it riding on the belt

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You don't need to change diff oils very often after first initial stage (usually about 25000km) After that about 80000km capacity should be in manual Probably about a quart each but just fill them up till oil starts running out cause the hole where you put the oil in is the level

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90000 is a suffficiently long time for a timing belt. I'd listen to the dealership.

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i understand why you want to do it yourself - it's expensive to have it done by a mechanic. that's because it's a major job to remove the engine, takes 4-5 hrs. i avoided having it done by having an honest mechanic i've been going to for a long time do something else (sorry, i don't know what) that fixed the problem temporarily. he told me it must be done after 90k miles or so, so i'm saving up.

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