I have a 2002 F250/V10- 4:30 rear- Truck has been very good to me- has about 120,000 miles on her. I tow a 5th wheel that weighs about 8,000 pounds. After years of towing her with no issues- this week...
V10 with 4.3 axle. What a great combo. I'm with the post on fuel filter. Have it changed. Tough to change out yourself. Mounted to frame on drivers side. I had a 02 V10. 120k mileage shouldn't be a problem. Great tow vehicle.