Lincoln Service Parts 1 › Lincoln Electric 9SL7578 GEAR BOX (BACK) L7578 Lincoln Electric 9SL7578 GEAR BOX (BACK) L7578 Sale Price: $922.33 Original Price: $1,060.68 GEAR BOX (BACK) PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! GEAR BOX (BACK) PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1