How to check rav4 transmission oil - 2006 Toyota RAV4

probably because it is over heating
run the fault codes to check for transmission problems
check oil level in the a/t
check coolant level in the radiator

https://rav4resource.com/toyota-rav4-transmission-fluid/

Here is some information about rav4 transmission fluid.

Check you transmission fluid for proper levels. If ok, have the transmission oil and filter changed!! If that doesnt remedy the issue, its possible the transmission needs to be replaced or rebuilt!!

Unusual for Toyota, have you checked your oil level? If it is a loud knocking, it could be a bad piston in the engine. Did you overheat the car at any point? The alloy head can warp easily if you get the engine too hot. Also check your coolant level to see if you are losing fluid. If the oil is white looking you have a serious issue with coolant mixing with the oil. Is it still under warranty for the powertrain, engine, transmission etc.?

The manual transmission oil, or gear box oil can't last forever. It is a good idea to replace every 60K miles with a new one. Just as with motor oil, and oil change is cheap insurance. Buy synthetic oil if you can.
The manual transmission oil change is a simple procedure, but can complicated and creates costly problems.
First remove the filling bolt. In some cases this is siezed, If the heating doesn't help, you don't want a stripped filler bolt, with an empty transmission. Use WD-40 and do not use extensive force.
If the bolt still won't budge. Stop. Lower the car and visit a shop for service.
After removing the filler bolt (upper), then remove the drain bolt at the bottom.
Replace the drain bolt, with a new one, normally has a magnet, and thread it by hand after with a wrench.
Fill the gearbox with oil using a gear oil / lube pump. Replace the filling bolt and process same as with draining bolt.
If you will change the gear box oil every 60K miles this is the best insurance for your manual transmission. DO NOT FORGET TO REPLACE FILLING AND DRAINING BOLTS WITH NEW ONE.
In rare cases a rusty bolt is siezed, almost rust welded in the transmission housing, so the transmission must be removed and taken to a machine shop.

you can do that by removing the transmission oil drain plug and drain the oil to the last drop but make sure the oil is cooled off before draining it, serious burn could happen (just a precaution) return the plug, tighten it but do not overtight as it could damage the plug, refill oil with correct ATF designed for your car.

Ok without knowing the RAV intinmately, below is the link with pics.

You will need a basic tool kit and drain pan and if its your first time a little bit of patience!

Good luck!

http://toyotaownersclub.com/forums/index.php?showtopic=89529&st=0&p=821701&#entry821701

it's Automatic Transmission oil temperature.Check fluid level.

1st to do,check transmission oil level

check with toyota,alot of the new transmissions have a long life transmission fluid that is filled thru a drain plug,and there is no dipstick.you maybe trying to find something that does not exist.another example is the 2005 to 2009 pathfinder.the filler tube has a bolt on it and the fluid is done at 160000km.check with toyota.