I've read a few posts re: trans problems, coolers, etc., on V-6/ 3L cars but they seem to pertain to '05 or earlier cars. My wife has 2006 Mazda 6S that I dont drive often. I noticed the last few times I drove it that it sometimes shifts hard - seems to happen more when its under load like merging onto a highway, etc - Today I drove the car and as I was merging and getting up to speed (not foot to the floor but getting on it) the trans seemed to slip out of 5th or 6th gear and into neutral. I put it into manual and downshifted to 4th and it went into a drive gear then put it back to auto and it was OK. Is this the start of something baaaadddd??