Hello lo. The transmission drive belt is part number 954-05027. Thank you for your question.
Your mower has two belts. Both play a role in making the blades turn. The "Deck Belt" goes around the pulleys right above the blades on the deck and then to a double pulley. The "Drive Belt" on your mower goes from the transmission, around an Idler pulley then over to the double pulley I mentioned before. The Drive belt also plays a role in making the wheels turn. Thanks for the question.
Hello Lisa, unfortunately we would be unable to help you with this question without a proper model and serial number. Those numbers would be found on a white sticker underneath the seat of the unit. Please feel free to contact us at 1-800-269-6215. Thank you for your question!