I have a 2002 Ford Explorer with automatic 4 wheel drive. Recently, after the car has been driven, I get a shudder ( best description) from the wheels when I turn at very slow speed, like in a parking lot or turning a corner. I have replaced the fluid in the transfer case but the problem remains. I don't notice any noise or shudder when I am driving at normal speeds. My first guess is that the problem is in the viscous coupler. Any other ideas? Can just the coupler be replaced or do I need a complete transfer case? Thanks in advance. PS. This definitely not a steering problem. I have completly checked that out.

This relates to the Ford Windstar to which I made an earlier post... and a recurrent problem of a brake pedal that sticks...resulting in a dead battery. A neighbor has allowed me to use his Craftsmen product which charges the battery. It is something from the 1970s...but still works like the day he bought it. However, I have been looking at the Energizer Jumpstarter with Air Compressor and Power Inverter. I do not know if this purchase would be "over-kill" for my particular needs. I can definitely see a basic need of jumping cars when they are dead... and filling low tires... but the power inverter seems to be a tool that I might not need. [URL="http://www.bestsellingproductreviews.com/energizer-84020-all-in-one-12v-18ah-battery-jumpstarter-with-air-compressor-and-power-inverter/"]Energizer 84020 12V All-In-One Jump-Start System[/URL]