When is the last time you did a fluid change? Hardly time to start worrying about replacing the tranny itself.
Pick-up a quality fluid (dipstick will tell you for certain what formula, manual will tell you how many quarts), a filter, and even consider something like Lubegard additive. I did so the last two times I've changed the fluid in my '05 6 speed and it behaves MUCH better than it did when I bought the car. (I also have an secondary tranny cooler, but that may or may not benefit you)
I don't know your particular tranny has a serviceable filter, but if it doesn't consider adding an in-line magnetic one.
'05 6 wagon: Eibach springs / MazdaSpeed sway bars / Bilstein / Steeda Adj FR links / Racing Beat RR links
GTSpec trailing & rr sub-frame braces / Steeda tower brace
MSDS headers / Magnaflow cat / Racing Beat mufflers / WeaponX coils
AEM CAI / EGR mod / FilterMag / Street Unit engine mount
EBC Ultimax Rotors & Redstuff Pads / StopTech brake lines / Motul fluid
B&M tran cooler / Inline tran filter / Amsoil ATF
Mazda iPod adapter/ CX7 antenna
Continental ExtremeDWS / Bridgestone Blizzak
Last edited by karlt10; 08-04-2011 at 10:33 PM.