Good day to all. I have a 1999 Lexus RX300 with 100,000KM on the ODO and i am hearing a humming noise comming from under the vehicle when accelerating from a dead stop. It is only heard at lower RPMs and stops once the vehicle picks up speed over 50KM/hr.

Now from what i am reading everywhere, i fear that this may be signs of a transmission problem. If anyone has any idea what this noise could be please let me know.



Also, if my transmission has to be changed- i would like to know if there are any other compatible transmissions that i could use in my vehicle????

I dont know if this makes sense but i figure if most RX300's have transmission problems, why not change to a more reliable transmission from another vehicle??

 

Welcome to the Club

There are only two transmissions that can go on there depending on if you have FWD or AWD:

For FWD: U140E
For AWD: U140F

The only thing you could do to improve the situation is upgrade to a better transmission fluid like Amsoil ATF or even further is doing something like, http://www.ipttrans.com/toyotaauto.shtml

There is no other type of transmission you can ram in there without some major, major $$$. It's simply not worth it.

Best thing for the moment to check on the situation would be to have your transmission fluid drained and filled along with changing out the filter in the transmission pan, https://www.clublexus.com/forums/sho...d.php?t=220061 and see what you have in the pan.

However, you may have an issue with your exhaust system, perhaps a leak at the accordion junction under the engine. I would have another observer outside the vehicle watch as you accelerate down a street with no traffic and see if they can pick up where the noise is coming from.

 

thanks alot for the info. I will get the exhaust pipes checked to see that is the prob. Also going to flush transmission this week!

 

oh the noise was not the transmission but the AC line vibrating against the engine. Apparently when i got the AC serviced the line was bent. The transmission guy found the problem and adjusted the line to suit. never woulda guessed!