Front & Rear Differential Fluid Replace?

[huylanalexus]

Hi Everyone,

I just switched to RX330 from my MDX. This is amazing car, so smoothly drive, luxury and MPG. I did 30k service by myself that inclued replacing A/C filter, engine filter, transmission fluid, engine oil. I'm thinking to replace front & rear differential fluid and coolant flush by dealer.

Do you all think this is good time to do these or wait until 60k? I read the note under hood, there's no need to replace coolant until 100,000.

Please give me an advice in this stuff.

Thanks all

[Lexusfreak]

Consider using synthetic for the front & rear diff fluids....what grade does the owners manual call for? I've use both Castrol Syntec & Mobil 1 75w90 in both of my Foresters (you are safe to use that grade if the manual calls for 80w90 btw as long as they meet GL-5 classification)......happy with the performance of both fluids & are safe for extended drain intervals. B)