1992 FORD F-150

Typical onset: 100,000-180,000 mi

Symptoms: Transmission fluid in coolant (strawberry milkshake appearance), Coolant in transmission (causes slipping, delayed engagement), Overheating transmission even with normal driving

Fix: Cooler lines corrode internally or cooler itself fails inside radiator. Requires radiator replacement (or external cooler bypass), complete transmission fluid flush, sometimes filter/pan service. If coolant contaminated trans badly, rebuild needed. 3-5 hours labor for cooler fix, 15-25 hours if trans damaged.

Estimated cost: $600-1,200 (cooler only), $2,200-3,800 (if transmission rebuild required)

Symptoms: Cannot switch between front/rear tanks, Inaccurate or dead fuel gauge on one or both tanks, Stalling when switching tanks, Check engine light with fuel system codes

Fix: The selector valve under driver side gets corroded, sending units in tanks fail from ethanol fuel. Valve replacement 2-3 hours, tank sender requires dropping tank (4-6 hours each tank). Many owners just run single tank and bypass the system.

Estimated cost: $400-800 (selector valve), $600-1,100 per tank sender

Typical onset: 80,000-150,000 mi

Symptoms: Rough idle, hunting idle speed, Hesitation on acceleration, Stalling when coming to stop, Poor fuel economy

Fix: PCV system dumps oil vapor into intake, carbon clogs throttle body bore and EGR passages. Clean throttle body (1 hour), replace EGR valve and clean passages (2-3 hours). Often comes with vacuum leak diagnosis time.

Estimated cost: $200-450

Typical onset: 180,000-280,000 mi

Symptoms: Excessive oil consumption (quart per 500-800 miles), Blue smoke on startup or acceleration, Rod knock or main bearing rumble, Loss of compression, hard starting

Fix: These engines can hit 200k+ but eventually wear rings, bearings, or both. 300 I6 is near-bulletproof but rings wear. V8s develop bearing noise. In-frame rebuild possible on I6 (20-25 hours), V8s usually get remanned short block (18-22 hours) or salvage yard replacement (12-16 hours).

Estimated cost: $2,800-4,500 (in-frame rebuild), $3,500-5,800 (short block swap)

Symptoms: Soft or spongy brake pedal, Brake fluid leaking at rear wheels, Visible rust on steel brake lines near frame, Parking brake ineffective or stuck

Fix: Steel brake lines rust through along frame rails and at rear axle flex points, rear drum wheel cylinders leak. Full brake line replacement (all four corners) takes 6-8 hours, rear wheel cylinders 1.5-2 hours per side. Parking brake cables seize (recall item). Many trucks need comprehensive brake system overhaul by now.

Estimated cost: $800-1,400 (full line replacement), $180-320 per wheel cylinder

Symptoms: Door sags when opened, hard to close, Gap misalignment between door and body, Clunking noise when opening/closing door, Door won't stay in detent positions

Fix: Hinge pins and bushings wear out, especially driver door. Replacement requires door support, pin removal, bushing pressing (2-3 hours per door). Some opt for aftermarket bolt-in hinge kits (easier, 1.5 hours). Related to NHTSA door structure concern.

Estimated cost: $250-450 per door

Symptoms: Headlights cut out intermittently or don't work, High beam indicator flickers, Burning smell from dash or column, Complete loss of exterior lighting

Fix: Headlight switch overheats from age and current load, dimmer switch in column wears. Headlight switch replacement 1-1.5 hours, dimmer switch requires steering column disassembly (2-3 hours). Multiple NHTSA recalls on exterior lighting. Check for melted connectors.

Estimated cost: $180-320 (headlight switch), $280-480 (dimmer switch)