I recently rebuilt my 4r75w will All new internal parts including hard parts and all has been good until recently. When it does a 4-2 or 3-2 wot shift kicking down into second gear it slips for a split second and then grabs. The rebuild kit I bought which was suppose to be for a 2004 new f150 came with a epc solenoid that is for the 04 heritage f150 ,and yes there is a difference,so I just my old one,but I would think other gears would slip also if that was it. I’m hoping this is a fix that doesn’t involve yanking this trans again. As much as I’ve searched on the internet I can’t anything. Has anyone heard of or had the this happen to them?