You folks may have answered this before but I couldn't find it. On odd occasions my subaru will slam into gear about 2-6 secs. after you move lever to select gear. No hesitation while driving/stopping (he says with fingers crossed) but sometimes with it in gear accelerating from stop it may do it, not that often. Parts store guy says he would put Trans-X(?) sealer/conditioner in tranny after removing some so it's not overfilled. Anyone have any other suggestions? Oh, it's a 2007 subaru forester x, auto trans, with about 138,000 miles. Head gasket issue was done under warranty back around 96,000 miles. We don't put much mileage yearly on this car even though it's used regularly. Any suggestions appreciated.