CREATE TABLE table_9558 ("Fin. Pos" TEXT, "Car No." TEXT, "Driver" TEXT, "Team" TEXT, "Laps" TEXT, "Time/Retired" TEXT, "Grid" TEXT, "Laps Led" TEXT, "Points" TEXT)

What is the car number for Jeff Simmons on the Rahal Letterman team?
SELECT "Car No." FROM table_9558 WHERE "Team" = 'rahal letterman' AND "Driver" = 'jeff simmons'
SELECT "Car No." FROM "table_9558" WHERE "Driver" = 'jeff simmons' AND "Team" = 'rahal letterman'