1966 CADILLAC FLEETWOOD

Symptoms: Transmission fluid leaking from radiator area or cooler lines, Pink milkshake appearance in radiator (coolant-ATF mixing), Overheating transmission, slipping shifts, Rusty, corroded steel cooler lines along frame rails

Fix: Replace transmission oil cooler (often integrated in radiator), replace all steel cooler lines due to rust-through. Flush entire system if coolant contamination occurred. 4-6 hours labor depending on radiator removal necessity.

Estimated cost: $800-1,500

Symptoms: Clunking when shifting from Park to Drive or Reverse, Excessive driveline vibration at idle in gear, Visible cracking or separation of rubber mount, Transmission tailshaft sitting lower than normal

Fix: Replace rear transmission mount, often the crossmember rubber is completely collapsed after decades. Requires supporting transmission, removing crossmember bolts. 1.5-2.5 hours labor.

Estimated cost: $250-450

Symptoms: Hard hot starts after shutdown, need to crank extensively, Raw fuel smell in engine bay after driving, Black smoke on startup when hot, Fuel leaking from carburetor base or accelerator pump, Rough idle when fully warmed up

Fix: Rebuild or replace Carter AFB 4-barrel carburetor, install heat shield or insulator gasket, verify fuel pump pressure isn't excessive (should be 5-6 psi max). 3-5 hours for proper rebuild and tuning.

Estimated cost: $450-800

Typical onset: 120,000-180,000 mi

Symptoms: Severe knocking from crankcase at idle, worsens under load, Oil pressure dropping below 10 psi at hot idle, Excessive oil consumption (quart per 500 miles or worse), Blue smoke on deceleration or startup, Metallic debris on magnetic drain plug

Fix: Engine requires removal for main bearing replacement, often coupled with rod bearings, piston ring work if cylinders worn. Conservative owners go for full rebuild at this point. 25-35 hours labor for engine removal, teardown, machine work coordination, reassembly, reinstall.

Estimated cost: $4,500-8,000

Symptoms: Automatic Climate Control not switching modes properly, Headlight doors staying open or closed, Cruise control not engaging or holding speed erratically, Hissing sounds from under dash, Hard or mushy brake pedal (if vacuum booster line fails)

Fix: Replace all vacuum hoses under hood and behind dash, test vacuum actuators individually, replace failed actuators. Requires dash disassembly for full job. 6-10 hours labor for comprehensive vacuum system overhaul.

Estimated cost: $600-1,200

Typical onset: 100,000+ mi

Symptoms: Intermittent fuel starvation at highway speeds, Engine stumbling under acceleration despite full tank, Fuel pump clicking but low output pressure (below 4 psi), Metal shavings in old fuel pump when removed

Fix: Replace mechanical fuel pump and pushrod, inspect cam eccentric for wear. If cam lobe worn, requires cam replacement which means engine disassembly. Simple pump/pushrod job is 2-3 hours; cam replacement adds 20+ hours.

Estimated cost: $300-500 (pump/pushrod only), $3,500-6,000 (if cam involved)