ok i have a lifted 2002 f150 supercrew fx4 i just recently took a trip to georgia (im from Virginia) pulling a trailor and car i get back and now its not shifting right... wont go in to gear at stoplights and when it does it slams into gear and when driving it goes in and out of gear but it goes into reverse fine....so i droped the pan and flushed to tranny fuid the old fluid was extreamlly thin and burnt... put new fluid and filter in and is still not shifting right... maby the shift soleonid idk im lost any ideas?

 

oh and if it was an electrical prob will there be any codes?