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Does anyone have a RX400h service manual in PDF or hard copy?

Based on my experience with my GX470 and the ATF-WS fluid it expands when heated. So there is a chance you may have changed it when the vechicle was warm or hot. The GX470 requires you to use a scantool to read the transmission fluid temperature to get a accurate reading on the fluid level. You need to becareful that you dont have to do something similar before checking the fluid level on your RX400h. There is a alternative way to read the ATF temperature so you can set the correct level. Do you have the service manual for the RX400h in a hard copy or PDF? I would like to get the instructions to change my dads ATF on his RX400h. Can you help? Um, I would be afraid that now the car is undriveable. It sounds like the plug you removed is not the fill plug. I would get confirmation of that from a dealer before I drove the car with only that much fluid in the CVT. Burning that baby up woudl be very expensive.

Does anyone know what size wrench I need to remove the automatic transmission fluid fill plug?

I have 30,000 miles on Royal Purple Multi Spec. Automatic Transmission Fluid without any problems. I am about to do a fluid change again. Please note you need a scan tool to read ATF temperature for correct fluid level check. I can send you the manual you could follow if you need it. I use their products for every fluid my vechicle requires. I order it from here. Stock up on all fluids at once since they charge $9.00 fee on all orders. http://www.jegs.com/i/Royal+Purple/831/01320/10002/-1 You can call Royal Purple technical support at phone: 281-354-8600 with any questions.