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Ron, found this at the redline site...
maybe your tranny was frothing out the filler tube....
"Synthetic High-Temp ATF provides the gear protection of a GL-4 gear oil in an ATF and provides a higher viscosity at higher operating temperatures, allowing the transmission to operate at 70°F higher temperature and still provide the optimal shiftability and improved torque converter efficiency. The evaporation characteristics are significantly improved, being twice as good as our Synthetic ATF and five-times better than a petroleum ATF. The improved thermal stability significantly reduces the rapid evaporation of the ATF which can produce a frothing out the filler tube. "
They had more words, but I only cut enough to make it understood. SVXs being know for heat, and you climbing a hill...seems ripe for frothing to me.
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