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Message: [QUOTE="Jake, post: 384580, member: 34"] That would be a fun heat transfer problem. Its just figuring out how much goes where. How much credit you can take for the air circulation, how much actual air movement do you have in some key areas. The oil has a higher specific heat so it will take more energy to heat the and more to take it away then air. With the coolers in the front of the truck for the transmissions there is some heat transfer there that I think would be better than just the case being the heat sink. I remember when I was trying to tow in the high 300's into the low 400's I experienced the same problems of just cooking all the driveline components. On the electric motors you just have the two bearings as your main frictional loss, there is some loss in windings and wind drag. But a super high E TEFC motor efficiency is in the 90% range, with the driveline parts there are just so many parts that are metal on metal friction especially with the use of ATF in the manual transmissions I think that is a double edge sword less fluid friction but more part to part friction. Same thing here we have electric motors and pumps that run for 18months strait I think it all boils down to the power transfer parts sized better for the input power and required power. [/QUOTE]

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