BOXY TRUCKS
Common problems · 1978–96

Full-Size Ford Bronco problems: 8 things to check

The problems owners and specialists flag most on the Ford Full-size Bronco, the repairs they end up doing and what those cost, plus the years and recalls to watch. Sourced, not scraped.

Read the full Full-Size Ford Bronco guideYears to avoidBiggest tireSpecs & fluids

Full-Size Ford Bronco problems to check before you buy

  1. Rust in Ford's favorite placesBronco Zone's long-time checklist names the inner rear fender lips, the bottoms of the B-pillars and the bottom of the tailgate, where spot-welded seams trap moisture. Also check the radiator core support where it bolts to the frame (mostly the passenger side), the floor around the rear seat-belt mounts, rain gutters, body mounts and the frame itself.
  2. Run the tailgate glass both waysLower and raise the rear window from the key and from the dash switch, then open and close the tailgate. Check the tailgate drains and the outer glass seal. A window that works from only one control points to the circuit, not the motor. On many trucks the driver's window switch must be in the center position before the tailgate key switch will work.
  3. Read the tires before the TTBUneven inner or outer tread wear means camber trouble. Look at the radius-arm bushings, which perish (one Bronco Zone owner replaced his at 80,000 miles), and check the ball joints and tie-rod ends. If the truck is lifted, ask whether adjustable camber bushings were fitted, because Bronco Graveyard says even 1–2-inch lift springs normally need them.
  4. E4OD fluid and the O/D lightOn 1990–96 automatics, the fluid should be red, not brown or burnt-smelling, and read full at operating temperature. A flashing overdrive light (TCIL) while driving means the transmission has stored a fault code. Owners recommend fluid and filter service every 30,000 miles, and sooner for towing.
  5. Try 4-High and 4-LowOn push-button trucks, the shift motor and its connector are known trouble spots, often from a broken travel stop or a fouled connector. Ford recalled some 1993 trucks (93V-089) whose transfer cases had the wrong shift motor and could slip out of 4-High.
  6. Compression, cooling and leaksOwners call a bad compression or vacuum test a deal-breaker. The plastic side seams of the radiator leak, most visibly after the engine cools overnight. Check the rear main and timing-cover seals, look for a cracked exhaust manifold or Y-pipe, and check for water in the oil.
  7. Decide whether you need a removable top1978–93 tops were designed to come off. From 1994 the top carries the rear three-point belts and the center brake light and is held with security Torx bolts. You can still remove it, but Wikipedia notes that driving without it can earn a ticket in some places.
  8. Open recallsOld trucks still show up with open campaigns. The 1994–96 speed-control deactivation switch (05V-388) and its 1993 equivalents (07V-336 and 08V-051) can overheat and burn, and 1988–91 trucks had an ignition-switch short-circuit recall (96V-071). Check the VIN on NHTSA's site.

The repairs Full-Size Ford Bronco owners end up doing

REPAIRSYMPTOMSDIFFICULTYTIMECOST
Fix a tailgate window that won't moveThe rear glass won't go up or down, moves from the key but not the dash switch (or the other way round), or grinds and stalls part-way.2 / 5≈ 1–3 hoursAbout $20 for a pair of regulator rollers (Wild Horses lists them at $9.99 each); a motor gear kit or a regulator costs more
Correct TTB camber with adjustable bushingsTires wearing on the inner or outer edge, especially after new springs or a lift, and an alignment shop saying it's 'out of adjustment'.3 / 5≈ 2–3 hours plus an alignmentParts plus an alignment
Replace radius-arm bushingsA clunk over bumps or on braking, wandering steering and caster that won't hold. The rubber at the rear of each radius arm, where it passes through the frame bracket, is cracked or squashed out.3 / 5≈ 2–4 hoursParts plus an alignment
Rebuild the TTB knuckle: spindle bearings, axle U-joints, ball jointsClunk or play at the front wheel, grease flung around the hub, a clicking U-joint when turning in 4WD, or a ball joint that moves when you lever the wheel top to bottom.4 / 5≈ 4–6 hours per sideParts plus your weekend
Replace the TFI ignition module (1985–91 EFI)Hard hot starts, intermittent stalling that clears once the engine cools, misfires or erratic running on a fuel-injected V8.2 / 5≈ 30–60 minutesParts plus a little patience
Fix a push-button transfer case that won't shiftThe 4WD lights blink or the case won't go into (or out of) 4-High or 4-Low on an electric-shift truck.3 / 5≈ 1–2 hoursParts plus labor
Service the E4OD (1990–96)Late or harsh shifts, a flashing overdrive light, or dark, burnt-smelling fluid.2 / 5≈ 2 hoursParts plus fluid
Cut out and patch the rustBubbling paint along the rear wheel-arch lips, holes at the bottom of the B-pillars or tailgate, a soft floor near the rear seat-belt anchors, a rotted radiator core support.4 / 5A weekend per areaPatch panels plus welding

Each repair links to a step-by-step guide with tools, part numbers and where to buy the parts.

Full-Size Ford Bronco recalls and service bulletins

Check any VIN for open recalls at nhtsa.gov/recalls ↗, or see the recall tracker.

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Take the printable Full-Size Ford Bronco inspection checklist: every check on this page plus the model-specific ones, on one sheet. Get the checklist →

Sourced from owners, specialists and factory documents; full sources are on the Full-Size Ford Bronco guide. Verify torque figures and procedures against the factory service manual (disclaimer).

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