Free - Twin Disc MG-5050 Troubleshooting Guide Parts for Twin Disc ® MG5050 Marine Transmissions - Transmission Seals Section 1 Front seal for MG5050, rear seal for MG5061 Twin Disc gear . Price: $ 10.36 Qty: ^ Details In Stock Add to Cart 2 Rear seal for Twin Disc marine gear MG5050 . Price: $ 43.98 Qty: ^ Details In Stock Add to Cart Go Back Free - Twin Disc MG-5050 Troubleshooting Guide