According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 1957-1979 Ford F-100 has 7 documented known issues, with 5 rated critical. The most serious are Weak 4-Wheel Drum Brakes — Fade and Single-Circuit Risk ($600-$2,000 repair), Cab Corner, Floor Pan & Rocker Rust (Structural Body Corrosion) ($800-$6,000 repair), In-Cab Gas Tank Behind the Seat (Fire/Fume Safety Hazard) ($300-$1,200 repair), Twin I-Beam Kingpin & Front-End Wear (Wandering, Vague Steering) ($500-$3,500 repair) and Y-Block Top-End Oiling Starvation (Sludged Rocker Oil Passages) ($400-$2,500 repair). Across all issues with published estimates, repair costs range from $150 to $6,000. DIY maintenance guides at au7o.io.