Mary's Hundai says it needs SP-III auto trans fluid ONLY. Seems to me after looking around on the interwebs this is not a specific standard specification, just a labelling by Hundai???
Got me thinking, when we took the 1991 Dolphin to the Toyota dealer he was emphatic that only Toyota special ATF should be added after he flushed the trans on our V-6. What brand/type are others on this forum using on your V-6's ??? The tranny does work hard on our RV's.