Alan64

Rx 450h gearbox service

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Ok so 2010 rx450h i was thinking the gearbox oil needs a change? Any advice on doing this ie. oil type, weather there is a filter and general tips

 

Thanks

 

Alan

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Hi,

There is an oil filter, some models have a very fine mesh wish can be cleaned and reinstalled. Other models have a paper filter which must be replaced. On some models like the RX there is a filler bolt with WS embossed on on it. If I remember correctly, it is on the high side of the gearbox may be passenger side and there is a protective shield to remove.  If there is no filler plug, very unlikely, you will have to do add oil by disconnecting the hose connected to the lower pipe on the side of the gearbox.  These are the flow and return oil hoses to the transmission fluid oil cooler. In this case, the drain plug is also the oil level plug. You will find another plastic tube within the drain plug, removable too, which sets the oil level.

The amount drained is about half the total capacity of the gearbox. WS is the transmission fluid used by Toyota. There others, fully synthetic better,  and so on , but I always use the manufacturer's recommendations.

Put the car on a level surface and  drain the oil. Add about 500 ml more oil of the amount drained. Re install the WS filler plug on the top side and the drain plug. Instead some models have two plugs on the gearbox sump, one is the drain, the other is the oil level plug. With both removed, you will know which is which. You can also identify them by looking inside them with a mirror.

Start the engine and observe the oil temperature using the Techstream or an infrared thermometer. Move the gear lever throughout the range about 3 times remaining at each gear for about 3 seconds. Leave the engine running in Park.

Before draining any oil, make sure that the Line Pressure is OFF with the power switch  ON, " ready ". When the oil temperature is between 30C and 40C, open the drain plug and let the excess oil drain. Refit the oil plug. If there is no oil coming out, repeat the filling procedure, adding more oil. For cold climates, drain at 35C.

To make the engine run continuously, put it in service mode :

Turn the power switch ON

Shift to P and press the accelerator Fully twice

Shift to N and   "                    "                 "

Shift to P and    "                    "                  "

Check that  " Maintenance Mode"  is displayed.

Turn the power switch ON

It is imperative that you have no Line Pressure. Normally, if the oil level is correct and there are no blockades in the flow and return lines, you do not get Line Pressure.

Test drive, drive it fast if you can and make sure you have no Pressure Line DTC

 

Chris.

 

 

 

 

 

 

 

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Brilliant thanks a million 

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8 hours ago, Alan64 said:

Ok so 2010 rx450h i was thinking the gearbox oil needs a change? Any advice on doing this ie. oil type, weather there is a filter and general tips

 

Thanks

 

Alan

If your going to do this you should also change the rear axle drive motor fluid. Be wary of using other than the Toyota fluid as it is a requirement for the oil to be a good electrical insulator as the winding's of the motor generators that are supplied with 650 volts run in this oil. 

John.

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Cheers john shes a front wheel drive model 

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