Auto Trans Fluid EXCHANGE MACHINES-Good or Bad ??

[CamarosRus]

My 2006 MAZDA 6 (Ford 4cyl/5spd JATCO Automatic) now has 39K on it.

I have never done anything to service the transmission. Ive read and been told by my reputable MAZDA dealer that their is no screen or filter to clean. The trans pan does have a drain plug

I was thinking about doing the drain and fill procedure where I would only get maybe 4qts out of the pan.
Entire system hold 9.75 qts. I would do this maybe three times thinking I would get a pretty good exchange
of new for old.

FYI........This 06' MAZDA 5 spd (JATCO) auto uses ATF with the M-V (or M-5) rating. This is different from MERCON 5. I have researched this and decided to use WOLFSHEAD (Amalie Oil company) Universal Synthetic ATF.

I then called around my home area and found a highly rated independent shop, that has one of those ATF
exchange machines. This pumps new fluid in as your old fluid is being pumped out.

Have you heard negatives about using these fluid exchange machines. It has been suggested to me that any sentiment or junk in the pan would be disturbed and mixed in with the "new" fluid ????

I may remove the pan myself and SEE exactly what is and is not in there.

Thanks for your thoughts

Chuck