Drive Train backlash

Thanx Redball, took my car in today, told them about the May 8, bulletin, and it was a no questions asked,fix. The mechanic told me, (if I could) to excerise the car at low speeds. (going zig-zag) to help lubricate the left, and right clutches. I drove home, 5mi., and noticed right away a lack of noise while backing up in the garage. No clunking sounds at all.