1976 AMC HORNET

Typical onset: all mileages due to age deterioration

Symptoms: Clunking when shifting from Park to Drive or Reverse, Excessive driveline vibration at idle, Visible sagging of transmission tailshaft, Harsh engagement into gear

Fix: Replace rubber transmission mount and crossmember bushings. Usually catches mechanics by surprise how deteriorated they are. 1.5-2 hours labor with basic hand tools. Often reveals that the rubber has completely separated from metal.

Estimated cost: $150-300

Typical onset: 90,000-150,000 mi or any mileage if neglected

Symptoms: Slipping in 2nd gear during acceleration, Delayed engagement when cold, No 3rd gear or stuck in 2nd, Burnt transmission fluid smell, Metal particles in pan during fluid change

Fix: The Chrysler-derived TorqueFlite variant used by AMC develops clutch pack wear and valve body issues. Rebuild requires 8-12 hours labor, new clutches, bands, seals, and often a torque converter. Hard parts (planetary gears, case) usually survive. Filter and fluid should've been changed every 30K miles but rarely was.

Estimated cost: $1,800-2,800

Typical onset: 150,000-200,000+ mi

Symptoms: Heavy knocking from crankcase, especially when cold, Low oil pressure at idle (under 10 psi hot), Metallic debris on magnetic drain plug, Blue smoke on startup if rings are worn

Fix: These engines run forever until they don't. Main bearing wear is the usual killer, sometimes accompanied by worn rings. Rebuild involves 16-20 hours labor: full teardown, machine work (align bore, deck, crank grind), new bearings, rings, gaskets, timing set, oil pump. Pistons usually survive. Cores are everywhere, so short block swaps are viable.

Estimated cost: $2,200-3,800

Symptoms: Hard starting after sitting overnight, Stalling at idle when warm, Fuel smell in cabin or garage, Visible fuel weeping at carburetor or lines, Poor fuel economy and black exhaust

Fix: Rubber fuel lines, carburetor gaskets, and fuel pump diaphragms deteriorate after 48 years. Mechanical fuel pump on side of block often weeps. In-line fuel filter gets forgotten and clogs. Plan on replacing all rubber fuel hoses, filter, pump, and carburetor rebuild kit. 3-5 hours labor depending on carburetor condition (Carter BBD or Motorcraft 2100 depending on year/engine).

Estimated cost: $400-750

Symptoms: Visible rust perforation in driver/passenger floor pans, Rust along front frame rails near radiator support, Rocker panels crumbling when touched, Sagging door gaps due to unibody flex, Rear spring mounts rusting through

Fix: Not a mechanical problem but affects structural safety. Hornets rust from the inside out in the floor pans, especially under carpets and around seat mounts. Front frame rails rot where they meet the radiator support. Repair requires cutting out bad metal and welding in patch panels. 12-20+ hours labor if you catch it early, may be uneconomical if structural rot is advanced.

Estimated cost: $1,500-4,000

Typical onset: all mileages

Symptoms: Temperature gauge climbing in traffic or hot weather, Coolant loss with no visible leaks, Heater produces little heat, Rust-colored coolant, Lower radiator hose collapses when cold

Fix: The 304 V8 runs hotter than the sixes and the cooling system often hasn't been maintained. Radiators get clogged internally, water pumps lose efficiency, thermostats stick, and heater cores leak. Full cooling system refresh: radiator recore or replacement, water pump, thermostat, hoses, flush block. 4-6 hours labor. The two-row radiators are marginal; upgrade to three-row if available.

Estimated cost: $600-1,200