CREATE TABLE table_23119 ("Fleet #" TEXT, "Year" FLOAT, "Manufacture" TEXT, "Model" TEXT, "Length  ( ft ) " FLOAT, "Engine" TEXT, "Transmission" TEXT)

What is the fleet number when the transmission is Voith D863.4 and the engine is Cummins ISL?
SELECT "Fleet #" FROM table_23119 WHERE "Transmission" = 'Voith D863.4' AND "Engine" = 'Cummins ISL'
SELECT "Fleet #" FROM "table_23119" WHERE "Engine" = 'Cummins ISL' AND "Transmission" = 'Voith D863.4'