1990 DODGE D150

Typical onset: 120,000-180,000 mi

Symptoms: Slipping between gears, especially 2nd to 3rd, Delayed engagement when shifting into Drive or Reverse, Burnt transmission fluid smell or dark/metallic fluid on dipstick, Complete loss of forward gears while reverse still works

Fix: Rebuild or replacement required. Most shops recommend rebuild with updated friction plates and bands. Expect 12-16 hours labor for removal, rebuild, and reinstall. Transmission cooler lines and radiator-mounted oil cooler often need replacement simultaneously due to internal contamination.

Estimated cost: $1,800-3,200

Typical onset: 80,000-140,000 mi

Symptoms: Hard starting when engine is hot, starts fine cold, Black smoke from exhaust, strong fuel smell, Fuel leaking into intake manifold causing flooding, Engine dies at idle or stumbles under light throttle

Fix: Replace fuel pressure regulator on throttle body assembly. Simple job, 1-1.5 hours. Often done alongside injector cleaning and idle air control valve service. Check for vacuum leaks at the same time as they compound the issue.

Estimated cost: $180-350

Typical onset: 180,000-250,000 mi

Symptoms: Excessive oil consumption, more than 1 quart per 500 miles, Blue smoke on startup or acceleration, Low compression across multiple cylinders, Knocking or ticking that doesn't go away with fresh oil, Metal shavings in oil or filter

Fix: Worn piston rings, ridge-worn cylinders, and tired valve seals are the typical culprits. Many owners opt for a rebuild at 200k+ miles. Expect 25-35 hours for complete disassembly, machine work (bore/hone, valve job), and reassembly with new pistons, rings, bearings, gaskets, timing chain, and oil pump. Some choose reman short blocks to save labor.

Estimated cost: $3,500-6,500

Symptoms: Fuel smell inside cab or around truck, Visible fuel stains on frame rails or ground, Hard starting due to loss of fuel prime overnight, Fuel gauge reads erratically or stays on empty

Fix: Steel fuel lines rust through where they run along the frame, especially in salt-belt states. Fuel tank sender units fail internally. Steel tanks themselves can rust and leak. Typical repair involves replacing fuel lines from tank to engine (4-6 hours), fuel filter, and possibly the in-tank pickup/sender unit (add 2-3 hours for tank drop). If tank is compromised, budget for replacement tank.

Estimated cost: $600-1,400

Typical onset: 60,000-120,000 mi

Symptoms: No-start condition with cranking but no spark, Intermittent stalling when engine is hot, Misfires, rough idle, or hesitation under load, Engine cuts out then restarts after cooling

Fix: The ignition control module on the distributor or the pickup coil fails, often heat-related. Cap and rotor corrode internally. Replacement is straightforward: 1-2 hours for distributor service including cap, rotor, module, and pickup coil if needed. Always replace cap and rotor together.

Estimated cost: $250-450

Typical onset: 100,000-150,000 mi

Symptoms: Clunking noise over bumps from front end, Steering wanders or feels loose on highway, Uneven tire wear on inside or outside edges, Steering wheel doesn't return to center after turns

Fix: Upper and lower ball joints wear out, especially if grease fittings weren't maintained. Tie rod ends also fail. Plan on replacing both upper and lower ball joints per side plus inner and outer tie rod ends. Alignment required afterward. 4-6 hours labor depending on rust and whether you're doing both sides.

Estimated cost: $800-1,400

Symptoms: Gauges read incorrectly or not at all, Intermittent gauge operation, especially fuel and temp, Speedometer jumps or sticks, Dash lights flicker or fail

Fix: Printed circuit boards inside the gauge cluster corrode due to age and moisture. Connections behind the dash corrode as well. Requires cluster removal (1 hour), cleaning contacts or replacing the circuit board, and reseating connectors. Sometimes replacing the voltage regulator on the back of the cluster fixes erratic gauges.

Estimated cost: $200-500