[spacemanspif]

Friend of mine has a Subaru STI that has a rear differential temperature sensor. NASCAR and other race cars run external differential coolers, I believe. Does using the full plug hole for a temp sender give accurate results? I thought the probe needed to be submerged for accurate readings, WE3ZS might see quick cooling if the sensor was submerged during the climb, and in the air while on the flat/down slope. My experience with rears is to fill until the oil flows out of the hole, if Fords are filled differently, my statement might not have any relevance but if I were adding a temp sender to anything, I'd make sure it was in constant contact with the substance it is supposed to measure.