i have a 1994 f150 4 x 4. problem is that sometimes it wants to shift really hard and the next time you drive it , it might shift just like it should , you might drive it every day for a week and it will shift fine, and then you might get iin it 30 minutes later and it shifts like it has a shift kit in it. i.ve been told the speed sensors need to be replaced. any help? also fuel pump in front tank quit working and i am using the rear tank, but i have noticed gas tries to come out of the cap in the front tank. what's causing this?

 

Which transmission - 4R70W or E4OD?

The fuel issue is common, you should find the answers if you search in the pre-97 forum.