New 2003 Ford Explorer 2wd 4.0 6cyl prob began at 500-700 miles. Excessive vibration and whining noise at speeds from 40-70 mph. Vehicle appears to struggle when accelerating, and cruising speeds. Dealer unresponsive after learning that Ford engineers acknowledge problem and have no current fix. Dealer unwilling to explore a replacement vehicle, or refund. Ford feild services engineer admitted to me that approximately 50% of new Explorer have this faulty "ring & pinion gear" and that vendors are working to certify replacement parts.

- Mckinney, TX, USA

Excessive whining noise coming from the rear differential/drive axles/driveshaft area of the vehicle at speeds between 50 and 60 M.P.H.

- Humble, TX, USA

I bought a 2003 Ford Explorer 4WD, V8 - Sept. 22, 2003. About 3.5 weeks later it began to shake and made a loud noise. I haven't gotten 1100 mile on it before it began its downward spiral. I took it into be repaired on 10/13/03 regarding the whining but I forgot to mention the vibration-- it only happen on 2 occasion thus far. But the whining is constant - around 50 mile and above. I was by the service person the engineers are working on it and I am to wait until they find a cure for it. I am not trusting them with my safety, I was told it was in the driveline/axle /driveshaft- the name changes but still the same explanation - no fix as of yet. Could be long-term or not at all. I want this vehicle replace - asap.

- Saint Paul, MN, USA

The consumer stated the vehicle vibrated excessively in the rear end. Dealer acknowledged manufacturer's tsb on issue advised problem caused by rear axle.

- Greentown, PA, USA