We have a 98 Cirrus with 62,000 miles. We purchased the car with 32,000 on it. Occasionally, since we've had it, when you shift from Reverse to Drive, the tranny does not engage into drive right away. This has happened maybe 10-20 times since we've had it. The lag time has lasted as long as 10-15 seconds. Once or twice it has slipped out of drive without after having put it into reverse first.Took it to the dealer and they claim the tranny is fine, no touble codes or anything. Aside from the engage drive problem, the car shifts flawlessly. Any ideas?