2004 lexus gx 470 transfer case buzzing noise underneath my seatwith 142000 mile on 2004 Lexus GX470

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It just started today. Does it need fluid or is it something major. How much do you think this will cost.

Can I chance it and drive it a 2 more days and then take it in?
(1) Answer
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These Lexus have a "know" bad O-Ring that causes an oil leak, Lexus have a bulletin regarding this. It's hard to advice if the vehicle is safe to drive or what exactly the problem is without being able to drive the vehicle hear the noise and check the oil level. I have seen several of these GX leak.