annoying squeak

Hi guys my p38 dse as just started making a squeaking noise when you back off on the throttle as anyone any ideas i have checked autobox level and thats spot on front and rear diff levels spot on its had new rear brake pads the other day and they been copper slipped front pads all ok engine levels all ok and not down on power etc

found out it was the front prop shaft both ujs had got play in them took the prob of noise stopped ordered new ujs so will be fitting them at weekend so now running it rear wheel drive only