jimbyjimb wrote:Always change fluid FIRST so as not to run dirty polluted fluids through the new clean filter. A proper tans flush is new fluid, then drop pan r/r filter.
Personally I think you should clean the pan before you change the fluid (doing a mechanical/manual flush).. you dont want to circulate pan grime into the system!
The in-transmission filter only filters large particles, so it doesnt matter because it doesnt really catch small pieces. If you're running an extrenal, I would still change the filter it afterwards.