We just had our transmission filter changed and it’s been running lousy ever since. Bringing it back to the shop tomorrow. Maybe I’ll print out this article and bring it with me.
Once my car was out of extended warranty, I began all the maintenance myself.
First time I changed the tranny fluid, it ran poorly. The manual said to use SPII fluid which is what I used. I then read the manufacturer's TSB and there was a bulletin advising the use of SPIII fluid. So, i drained the fluid I just put in and replaced it with SPIII and it ran much better although still had some shift problems due to the amount of SPII fluid that was leftover in the torque converter. I went back, drained the fluid again and added fresh SPIII and that did the trick. Shifts as smooth as silk.
Unfortunately, it cost me an extra $100 worth of fluid to make up for having added the wrong fluid.