lockar kickdown cable

Do you guys have a spring keeping tension on the K/D lever on the trans? I had a problem like that and I talked to a caouple of guys and they told me to put a light carb return spring on the lever. The stock linkage keeps the lever in a steady spot but when you switch to the cable it has some slop. With the spring it will pull it back at reast and the cables then has some tesion cause it's pulling against the spring.