1962 CADILLAC FLEETWOOD 75

Typical onset: 60,000-90,000 mi or after long periods of storage

Symptoms: Transmission slipping or delayed engagement when hot, Burnt transmission fluid smell, Fluid mixing with coolant (pink/milky fluid in radiator), Hard shifts or no movement in gear after highway driving

Fix: External cooler lines rust through or internal radiator cooler corrodes, requiring cooler replacement and full fluid flush. If contamination occurred, expect full transmission rebuild. Cooler-only fix: 3-4 hours; full rebuild with torque converter: 18-24 hours.

Estimated cost: $800-1,200 for cooler/lines; $3,500-5,500 for full rebuild

Typical onset: Original mounts typically failed by 50,000 mi; replacements every 40,000-60,000 mi

Symptoms: Severe clunking when shifting from Park to Drive or Reverse, Vibration through floorboards at idle, Visible engine/transmission sag when inspected from below, Driveline shudder on acceleration

Fix: Rubber mounts harden and crack with age. This car uses four engine mounts plus a transmission mount; all require replacing as a set due to weight distribution. Requires transmission support and floor jack choreography. 4-6 hours labor.

Estimated cost: $600-1,000

Typical onset: 100,000-150,000 mi, or after prolonged storage without oil circulation

Symptoms: Deep knocking sound from bottom of engine, rpm-dependent, Low oil pressure at idle (below 10 psi hot), Metallic debris in oil filter or pan, Sudden catastrophic failure if ignored

Fix: The 390 is generally stout, but poor maintenance or sitting kills bearings. Rod bearings can be done in-chassis with pan drop (12-16 hours), but mains require full engine removal. Most shops recommend full rebuild at this point given the labor overlap. Engine R&R alone: 16-20 hours; complete rebuild: 35-45 hours.

Estimated cost: $2,800-4,200 for rod bearings only; $6,500-9,500 for full rebuild with R&R

Typical onset: Not mileage-dependent; happens after 6-12 months of storage

Symptoms: Hard starting or no-start after sitting, Rough idle, stalling at stops, Fuel smell from engine bay due to flooding, Black smoke from exhaust (rich running)

Fix: Original Carter AFB 4-barrel carburetors sludge up quickly with modern ethanol fuel. Requires complete disassembly, ultrasonic cleaning, rebuild kit, and float adjustment. Replace fuel filter and blow out lines. 4-6 hours for proper rebuild.

Estimated cost: $450-750

Typical onset: 70,000-110,000 mi

Symptoms: Soft or spongy brake pedal, Pedal slowly sinking to floor when held at a stop, Brake fluid loss with no visible external leaks, Hissing sound from booster when engine running

Fix: Single-circuit master cylinder system means internal seal failure affects all brakes. Vacuum booster diaphragms also fail. Given the car's weight (over 3 tons), this is life-critical. Master cylinder replacement: 2-3 hours; booster adds another 2 hours. Strongly recommend full brake system inspection and line replacement if original.

Estimated cost: $600-1,100

Typical onset: 50,000+ mi or after long storage

Symptoms: Groaning or whining when turning at low speed, Heavy steering effort when cold, Puddles of red ATF-type fluid under front end, Pump reservoir constantly low

Fix: Saginaw pump seals and steering box sector shaft seals dry out. Pump rebuild: 3-4 hours; gearbox reseal: 5-7 hours due to steering linkage complexity on this long chassis. Often both leak simultaneously.

Estimated cost: $500-800 for pump; $800-1,300 for gearbox