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I have used one hydraulic oil filter in a piece of equipment I worked on years ago. It used a 3 phase 4 wire 6,600 watt heating element, it was rather large and had quite a bit of surface area.
I am using the 3/4'' pipe thread heater assuming that's all I can get to fit in the transmission pan. I have ordered both 1''NPT and 3/4''NPT weld in aluminum bungs.
If I can use the 1 inch bungs then I can use hot water heater elements and transfer 600 watts worth of heat to the transmission fluid over a much greater surface area. Using hot water heater elements they will be ran at a fraction of their normal operating wattage.
If I were to use a hot water heater element I would run a 2400 watt 240 volt heater at half voltage giving me 600w watts of heat, or a 1200 watt 120 volt heater on half wave power, again giving me 600 watts.
I picked the 3/4''NPT heater because I knew if I didn't use it in the transmission I can always put it in the differential cover.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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