I pull cranks behind a "Carolina" style set up. That means putting a weight (like 1/2 oz egg sinker) on the main line followedby a bead and then a swivel. On the other end of the swivel, tie about 1 1/2' to 2' leader (I mostly use 10# fluorocarbon leader material). On the business end of the leader, tie on the crankbait. This time of year I have found moving about 0.5 to 0.8 miles and hour works much better. As the water warms, I gradually increase speed. About the maximum speed is 1.5 mph.
This photo is from two days ago. The crappie was on a Matzuo Nano Cranker and 1/2" shy of the lake record. I hope this helps.

Name: CanyonF 2-25-15.jpg Views: 669 Size: 69.3 KB