The cooling is optional.
Let's ask DDG::
Quote:
https://us.lexusownersclub.com › forums › topic › 68738-cvt-rear-differential-fluid
Cvt & Rear Differential Fluid - 04 - 09 Lexus RX330 / RX350 / RX400h ...
OK, did the fluid changes, Looks like the original fluid judging by these pictures...little over 4 qts for the front transmission and 2 qts for the rear. Used WS toyota fluid, was $8 per qt. in the pictures see the sample of new and old on the paper. This was at 89k miles...note the sample was from front. The rear still had a red color.....
https://www.carid.com › lexus-rx-differential-lubricants
Lexus RX Differential Oil | Synthetic, Multi-Grade - CARiD.com
Made to provide the perfect lubricant solution for your needs Designed with innovative manufacturing techniques. ... SAE 80W-90 Synthetic Rear Axle Gear Oil, 16 Gallons by Motorcraft®. Oil Base: Synthetic. Volume: 16 Gallons. Rear Axle. ... RX400h; RX450h Base; RX450h F Sport; RX450h Sportdesign; Help Center. My Account. Track My Order.
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