1990 FORD BRONCO

Typical onset: 80,000-150,000 mi

Symptoms: Pink or strawberry-milkshake appearance in coolant overflow or radiator, Transmission slipping or delayed engagement after coolant mixing, Overheating transmission, burnt ATF smell

Fix: The cooler is integrated into the radiator bottom tank. Coolant breaches into ATF lines, requiring radiator replacement, complete ATF system flush (sometimes multiple flushes), filter, and often transmission rebuild if coolant contamination went unnoticed. 8-14 hours labor if trans needs rebuild.

Estimated cost: $1,200-3,500

Typical onset: 150,000-220,000 mi

Symptoms: Heavy oil consumption, blue smoke on deceleration, Rod knock or main bearing rumble, especially cold start, Low oil pressure at idle when hot, Metal in oil filter or magnetic drain plug

Fix: Windsor V8s, especially the 5.0L and 5.8L, suffer bearing wear if oil changes were neglected. Requires full teardown: either short block replacement or complete engine rebuild with new pistons, rings, bearings, machine work. 18-24 hours labor plus machine shop time.

Estimated cost: $3,500-6,500

Typical onset: 100,000-180,000 mi

Symptoms: Hard starting after sitting, especially when hot, Sputtering or loss of power under load, No-start with empty fuel smell, low fuel pressure reading, Fuel gauge erratic or stuck

Fix: In-tank electric pump fails, often along with corroded sender unit and deteriorated rubber hoses. Requires dropping the 33-gallon rear-mounted tank. Replace pump, filter, sender, and check filler neck for rust. 3-5 hours labor.

Estimated cost: $600-1,200

Typical onset: 120,000-180,000 mi

Symptoms: External coolant weepage at head/block mating surface, White smoke from exhaust, sweet smell, Coolant loss with no visible leaks underneath, Overheating, bubbles in coolant overflow when running

Fix: Windsor heads prone to warping if overheated. Both heads should be pulled, pressure-tested, and decked. Replace gaskets, head bolts, coolant hoses during reassembly. 12-16 hours labor.

Estimated cost: $2,200-3,800

Symptoms: Random stalling when hot, restarts after cooling, No-start with no spark, crank but won't fire, Stalling in traffic or at highway speeds with no warning

Fix: The Thick Film Ignition module (mounted on distributor) heat-soaks and fails. Ford issued recalls, but replacements also fail. Keep a spare in the glovebox. Also inspect distributor cap, rotor, ignition coil. 1-2 hours labor for full distributor service.

Estimated cost: $200-450

Typical onset: 80,000-140,000 mi

Symptoms: Clunk when shifting into drive or reverse, Vibration at highway speeds, driveline shudder, Visible sag in transmission tailhousing

Fix: Rubber mount deteriorates, allowing excessive drivetrain movement. Check crossmember for cracks while you're under there. 1.5-2 hours labor, straightforward job.

Estimated cost: $250-500

Typical onset: 90,000-150,000 mi

Symptoms: Gear oil dripping on inside of rear wheels, Visible oil coating brake drums or backing plates, Low differential fluid level

Fix: The Dana or Ford 9-inch rear sees seal deterioration and bearing wear. Pull axle shafts, replace seals and bearings if pitted. Check gear oil level and condition. 2-3 hours labor per side.

Estimated cost: $400-800