Quote:
Originally Posted by Tannaton
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If I was towing heavy stuff consistently up and down hills I would probably fit one - but don't forget the later cars did have one already in the sense that there was a heat exchanger with the engine coolant in the radiator.
The P1 V70 2.5D also has an OEM ATF cooler built into the engine coolant radiator.
It's hills at sub 50 mph that kills the oil as the torque converter wont be locked. This is when it is very good practice to use the Manual mode of geartronic as you get TC lock up in 3rd, 4th and 5th (on 5 speed models anyway).
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When towing I always try to engage TC lock-up as soon as possible and in hilly terrain changing down in manual mode ( not geartronic for me - 4 speed ) does, often but not always, achieve this.
Better to have TC lock-up in manual mode 3rd than TC slip in auto mode 4th due to extra load - despite extra RPM.
Colin