4 speed harder to get in get after warmed

Seems I am having to push it to the floor to get it to shift. The fluid level is fine. I filled it till it flowed out the service hole. and it only leaks a bit. So no where near enough to cause an issue this early. I have read both sides with atf and gear lube. no clear cut answer. Mine had gear lube in it when I bought it. So I topped it back off when some came out from removing the drive shaft. ok a lot.. haha