Just came back from a jolly in the North Flinders Ranges SA. I have a 2018 GXL Prado with a couple of Scangauges daisy chained. I can see most ATF temps all the time now.
I noticed situations during which the temperature of the Torque Converter would rise to nearly 120 DegreesC. It normally sits in the 85-95 C range.
When driving up Mt Caernarvon (a couple of hours from the Park gate to the mountain top at 950m altitude, in 4L and with centre diff locked when grinding up the scores of steep shaley slopes) the Torque Converter temp sits in the nominal range.
But when cruising on very easy but windy, undulating gravel roads in 4H, the Torque Converter temp blows out to 110-120 C.
It seems to me that the ECU is too confused to engage the Torque Converter lockup, and therefore the oil starts to cook.
And I'm wondering what the safe operating temp range is.
Anybody else seeing this?
I noticed situations during which the temperature of the Torque Converter would rise to nearly 120 DegreesC. It normally sits in the 85-95 C range.
When driving up Mt Caernarvon (a couple of hours from the Park gate to the mountain top at 950m altitude, in 4L and with centre diff locked when grinding up the scores of steep shaley slopes) the Torque Converter temp sits in the nominal range.
But when cruising on very easy but windy, undulating gravel roads in 4H, the Torque Converter temp blows out to 110-120 C.
It seems to me that the ECU is too confused to engage the Torque Converter lockup, and therefore the oil starts to cook.
And I'm wondering what the safe operating temp range is.
Anybody else seeing this?
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