Performed an auto trans fluid and filter change, incl torque converter. Filled in the prescribed amount (4 litres) before firing it up, then added the remaining .75 litre or so. Trans took several minutes before it could engage forward or reverse, despite being filled with correct fluid amount. After it allowed me to reverse out of driveway, I took a spin around block and verified fluid level on level ground.
Now for the real test driving. While before the trans performed very well, it now (with fluid change) flares between the 3rd and 4th gear upshift (like someone shifted into neutral briefly). It has done this several times, mainly when below full operating temp. This is disconcerting because if not paying attention it could quickly overrev the engine. The flaring occurs mainly with 75% throttle acceleration. New fluid was basic Shell ATF Mercon / Dexron. I'm disappointed that this preventative maintenance attempt has rendered the transmission less "idiot proof."
Could there still be air trapped in the gear band solenoids, or am I looking at a modulator pressure check and adjust? Three way solenoid clicks and appears to move back, center, front. Intake switch clicks just after tip in.
Thanks,
-Hans