Quote:
Originally Posted by MikeS100
Hi,
Has anyone ever measured the gearbox oil temperature for an XC90 auto while towing? It used to get very hot in my V70 so I fitted a gearbox oil cooler, I'm trying to decide whether I should do the same in our 2008 XC90 when we get it. Is the gearbox oil heat exchange any better in the XC90 or is it similar to my older V70?
Thanks,
Mike
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Have you measured yours ? don't worry if it gets to 120C or so , It is the only way to boil off any water / condensation in there . Don't forget that once on the move around 50 mph the torque converter locks up so virtually no heating or frictional loss in the gearbox so very little heat generated . The oil is always being heated or cooled to match coolant temperature with the standard heat exchanger. If you fit an uncontrolled external cooler the fluid is unlikely to get hot enough to vaporise any water/condensation inside .