Reliability AnalysisBased on known issue patterns, repair cost data, and ownership trends · How we score

1991 Ford F-350 Reliability ReportKeepScore 78/100 · top failure points · buy or avoid

78/ 100

KeepScore

MODERATE RISK

Grade: C+

A truly capable, no-nonsense truck for the dedicated owner, but budget wisely for its age-related quirks and potential major repairs.

Full system breakdown + what I would do

Quick Facts · 1991 Ford F-350

  • Scores 9 points below the strongest nearby year — the 1989 Ford F-350 earns a 87.
  • The system most likely to surface first: e4od automatic transmission (major severity).
  • Has 7 NHTSA recalls on record — the most notable involves the tires:tread/belt.

1991 Ford F-350: Buy or Avoid?

The 1991 Ford F-350 is a quintessential heavy-duty workhorse, offering immense capability for towing and hauling that few modern trucks can match for the price. However, its age and certain known vulnerabilities, particularly the early E4OD transmission and pervasive rust issues, demand a cautious approach and a thorough pre-purchase inspection. This truck is a formidable asset if you know its weaknesses and address them proactively.

Biggest Strengths

  • Rugged frame and chassis durability
  • Powerful engine options (7.3L IDI diesel, 7.5L 460 V8)
  • Simple, DIY-friendly mechanicals

1991 Ford F-350 — Known Trouble Spots

The systems that break first on the 1991 Ford F-350. Mileage windows, repair costs, and fix-before-you-buy notes are in the full report.

1
E4OD Automatic Transmissionmajor
2
Rust and Corrosionmajor
3
7.3L IDI Diesel Fuel Systemmoderate
Typical mileage, cost ranges, and the exact what-to-check list are in the full report.

Safety Recalls on the 1991 Ford F-350

7 recalls on record from NHTSA. Check your VIN atnhtsa.gov to see if the repair was performed.

TIRES:TREAD/BELT

THIS IS NOT A SAFETY RECALL IN ACCORDANCE WITH THE SAFETY ACT. HOWEVER, IT IS DEEMED A SAFETY IMPROVEMENT CAMPAIGN BY THE AGENCY. EQUIPMENT DESCRIPTION: FORD IS REPLACING ALL FIRESTONE WILDERNESS AT 15, 16, AND 17 INCH TIRES MOUNTED ON FORD TRUCKS AND SUVS. FORD REPORTS TREAD SEPARATION CAN OCCUR DUE TO A COMBINATION OF THE SENSITIVITY OF THE TIRE DESIGN TO STRESS, AGING, AND MANUFACTURING DIFFERENCES BETWEEN PLANTS. FORD IS REPLACING THESE TIRES TO PREVENT POSSIBLE PREMATURE TIRE FAILURE. VEHICLE DESCRIPTION: THE VEHICLES LISTED BELOW MAY HAVE BEEN ORIGINALLY EQUIPPED WITH FIRESTONE WILDERNESS AT TIRES OR MAY HAVE HAD WILDERNESS AT TIRES INSTALLED DURING THE FIRESTONE RECALL LAUNCHED IN AUGUST 2000. CERTAIN 1991 THROUGHT 2002 FORD EXPLORER CERTAIN 2001 THROUGHT 2002 EXPLORER SPORT, AND SPORT TRAC CERTAIN 1997 THROUGH 2002 MERCURY MOUNTAINEER CERTAIN 1991 THROUGH 2001 RANGER CERTAIN 1999 THROUGH 2001 EXPEDITION CERTAIN 1991 THROUGH 1994, AND 1997 MODEL YEAR F-SERIES CERTAIN 1991 THROUGH 1994 BRONCO NOTE: BOTH ORIGINAL EQUIPMENT AND REPLACEMENT TIRES ARE AFFECTED.

STEERING: STEERING WHEEL/HANDLE BAR

KEYS ATTACHED TO THE KEY RING OF AN IGNITION KEY WHILE IT IS IN THE VEHICLE IGNITION CAN BECOME LODGED IN THE STEERING LOCK RECEIVER AS THE STEERING WHEEL IS BEING TURNED.

What breaks on the 1991 Ford F-350?

Full reliability breakdown — engine, transmission, rust, electrical. With repair costs and mileage danger zones.

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Ford F-350 — Year-by-Year Comparison

Compare KeepScores across nearby years of the Ford F-350. Click any year for its full report.

Competing 1991s Worth a Look

Similar class, similar year range — ranked by KeepScore.

Relevant Products for Your 1991 Ford F-350

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Frequently Asked Questions

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