racertracer wrote:
I agree with TJKJ2002 on waiting too long to clean the tranny.
The dealer most likely attached your transmission to the Dreaded automatic transmission flushing machine.
This machine works great on low mileage vehicles and those vehicles that have a properly maintained Transmission, but not so great on high mileage vehicles that have never had their transmission fluid changed.
According to the service manager that replaced my transmission recently, this flushing machine has the tendency to churn the accumulated metal shards and dirt resting undisturbed in the nooks and crannies at the perimeter of the gears and relocate them onto the plates, gears and other moving parts.
He said that, more often than not, flushing the transmission of a high mileage vehicle, almost always causes the transmission to malfunction in one way or another.
The best thing to do to a high mileage vehicle with a dirty transmission is to drop the pan, drain the fluid and replace with new, instead of flushing.
Some have done the transmission fluid drain several times back to back and each time they got more debris to drop out. Doing it this way may bring the tranny back to normal and hopefully prevent a rebuild.
The idea is not to suck the fluid out of a high mileage vehicle, but to drain it.
So is the factory recommended 60k mile fluid changes adequate or should it be done sooner?
FYI, I used Seafoam's TransTune in my fiance's Legacy with good results. It had 75000 miles and I had no service records, so as far as I know the fluid was never done. It was shifting hard and hesitating so I put the TransTune in and it made the transmission shift like butter. I did a full fluid change after running the TransTune for ~100 miles and its been great ever since.