On my 5000 series the spring for the brake proportioning valve where it connects to the trap arm can let off quite a sqeak. When i remember to I grease it. Doesn't silence the beast for long though. HTH, Mark Pollan, '86 5KCSTQ 280K Miles >> I have noticed that if I push down on the rear of the car when its >> stationary it produces a similar (but less loud) noise.