1 Preheat oven to 350 degrees F (175 degrees C). Grease and flour 3 – 8 inch pans.
2 Prepare cake mix according to package directions with the addition of mandarin oranges and nuts. Pour into 3 – 8 inch pans. Bake in the preheated oven for 20 to 25 minutes, or until a toothpick inserted into the center of the cake comes out clean. Allow to cool.
3 To make the filling: In a large bowl, combine crushed pineapple with juice and pudding mix. Fold in the whipped topping. Spread between cooled cake layers. Chill in refrigerator