Place cake mix, dry pudding mix, soda, oil and eggs in large bowl. Beat with electric mixer on low speed just until moistened. Beat on medium speed 2 minutes, scraping side of bowl occasionally. Gently stir in walnuts.
Pour batter into greased and floured fluted tube pan or 10-inch tube pan.
Bake 40 to 45 minutes or until toothpick inserted near center comes out clean. Cool in pan 10 minutes.
Remove cake from pan; cool completely on wire rack.