Ok, What have I done now... (904 problem?)

So tomorrow I think I will check and/or add some more fluid and if that doesn't help the sluggish shifting then I'll pull the pan off and confirm the clearance between the pan and filter.

It would be nice to know how much clearance it needs. Is there any harm in eliminating the spacer all together and running the filter at the stock height?

Thanks

no harm there, you will just have more fluid. as far as clearance , i would say as long as there is enough room for fluid flow and the filter isnt sitting on the bottom of your pan you will be alright.