Originally Posted by osborste
normally it should have been done. by pick-up screen i mean transmission filter inside tranny pan some gm car's would drop this filter into the pan(snap in fit)thus raising the height of oil pick in corners the pick up would suck air giving a feel of tranny slipping on acceleration after cornering or the filter is just plugging up also just a thought check the tranny pan i have seen some mechanic's crush the pan into the filter to support it while engine is out breaking the filter inside the pan it only plastic and filter material
THESE ARE THE SAME MECHANICS THAT PUT JACKS UNDER YOUR SUSPENSION COMPONENTS.here is my ideas.you might have a vacuum
problem .what happens if you drive downhill?which it shift?try shifting it using low,2,3 take up the rpm to 3000,and shift fron 2 to 3 manually at the same time that you bring back your foot off the gas pedal.this will increase the vacuum.if the guy messed around with the vacuum line that controls the cabin controls,and it is split off,that could do it.the throttle position sensor might be telling the wrong info to the transmission controller module .it could think you are accelerating.all this of course if the fluid is not burnt.be careful when adding the fluid,it does not take alot to overfill it.add 100 ml at a time.
overfilling will cause a host of other trouble.