Marvin is right. I could be wrong--but probably tall fescue is a better bet for shade in the transition zone. Local advice is best for this situation. Add organic matter to improve soil. Adding sand to soil will not improve drainage much--the pore spaces between the sand particles will fill with clay particles--the soil may become harder still. Better to recontour the area to ensure adequate slope and surface drainage.
If you use a fescue seed--be sure to read through all the seed company tech sheets and get one that claims to be shade-tolerant. If you can find one that also claims to be disease resistant, and falls in the top ten in your state university tests for NTEP.com --that is even better.
You do not want a low-growing "dwarf type", as they lack vigor and are slow to take hold.