I Hagar made the same mistake -------------------- way way back. Took that small bolt out to drain -----NOTHING ?----scared the daylight out of me. Figgured tranney was trashed ---- Then I made a what here is called a " Nifty " tool an old wheelstud and a big yankee hexnut ---- BINGO ---- use 1 /2 inch drive socket set. Hagar.