I guarantee there are guys out there in the forum who have more experience with me,so I'll see if I am wrong. The haynes manual and various sites all around the web say that if it is an older car that has been sitting around and the transmission is a little sticky, give it a flush.

However, from my time working at tire kingdom, and from word of mouth from other people who work on cars, I was told not to flush a transmission if the car has more than 100,000 miles on it, becuase the valves have probably expanded with all the contaminants in the fluid and now accomodate said fluid that is dirty, and changing it to clean fluid will make the transmission slip.

Is this true? Have you guys had any problems when changing transmission fluid? I'd just like to make sure before I screw up and have to blow a grand and a half on a new transmission.