Missed the cold weather and noise from the pump... mine does the same thing when it's really cold, goes away after it warms up. This is with the new pump. Not sure why, but hasn't been an issue for the past 3 years it has done it.
Change the fluid.
I flushed the system with clean regular power steering fluid (replaced the steering pump on mine) and filled with MOPAR +4 POWER STEERING FLUID ($9.99 a qt at Pep Boys before the 20% off coupon) while running the returns into a bucket and keeping the pump full with a helper turning the steering wheel and pumping the brakes and the cold weather noise is pretty much GONE ...
