2000 ford escort zx2 automatic transmission slipping.Unplugged connector right below the neutral saftey switch now it shifts why?

What is your question?

i recently bought a 2000 ford escort zx2 with an automatic transmission i got it cheap cause the transmission was slipping.I changed the filter, did a fluid change, replaced the VSS and did alot of reading and no changes the slipping remained constant. Today I unplugged connector right below the neutral saftey switch its an orange connector with 8 pin-in slots. With it unplugged it shifts and before it would'nt move unless it started in low, then got up to speed then drive and finally over drive, but now it shifts great why? My car has 155000 miles.

What makes this problem better or worse?

constant

How long has your 2000 Ford Escort had this problem?

purchasecf it 2 weeks ago