Lexus Troubleshooting Questions? Ask a Lexus Expert
Yes you are probably low on fluid, this will cause a whine from the pump in the transmission.
To check the fluid level you need a scan tool. The transmission needs to be heated between 104*-114*F and you need a datalist on the scan tool to see this, it is very important that its in the this heat range or else it wont be correct.
There is a special procedure to add fluid to this transmission. I would take this to a shop to have the level checked.
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