hay man i had a diff problem but this one fix does alot. I also replaced those components (ford must be making more stock to beat the band) with no use. turned out if u unplug all the connections in the wiring loom at the rear of the engine bay on the bulkhead and clean the connections. mine had all dust in them and when i cleaned them the problem i had stopped (mine was reving up when clutching between gears) aparently the dirt can make loads of diff problems.
hope this helps