Hey Neal, or anyone that might know.
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HI!... I know the 4R70-W like mine only has 4 stud. I believe the LIGHTNING 4R-100 has a 6 stud. The E40-D is like the 4R-100. You might have 6 unless it was just a LIGHTNING specific thing. Sorry don't really know for sure. You could always pull the inspection plate off your tranny bell housing and rotate your flexplate and count them. Make sure to mark the studs with white out or something so you don't lose count.