coachreed there is no dipstick tube.
you remove the fill screw on the pan and fill until fluid overflows . let vehicle idle until fluid comes up to temp. fill until fluid overflows. it does not say in the manual to shift trans but i have always done this to make sure fluid is at correct level. if i were you i would take it to have the tranny fluid changed after install. take it to a place that has the machine to remove all the old fluid and replace with new. otherwise you will never get all the old fluid out. shawn