So I bought a 2006 F150 XLT 4X4 5.4 cheap. Did the cam Phasers, timing chains and gear, water pump, oil pump etc. Runs great. now the rear diff clutch packs were shuddering so I changed them out. Followed the instructions and everything went quite well. Now I go to try it out and it is worse than it was before. I pre-soaked the clutch plates and used lucas oil 75-140 and was told it has friction modifier already. What could I have done wrong? It also had a loud howl before and now that is also louder?