1967 PONTIAC LEMANS

Symptoms: Excessive driveline clunk on throttle application, Vibration at idle that wasn't there before, Visible sagging or cracking of rubber mount material, Transmission tail housing contacting crossmember

Fix: Replace all mounts as a set—original rubber compounds are long past service life regardless of mileage. Expect 2-3 hours labor for transmission mount with proper support, 1.5-2 hours per engine mount depending on access with A/C and power steering.

Estimated cost: $400-800

Symptoms: Hesitation or stumbling under load, Hard starting after sitting, Engine dies after warming up, Fuel starvation at highway speeds

Fix: Decades-old fuel tanks grow rust and varnish that plugs filters and carburetors. Full fuel system service includes tank removal/cleaning or replacement, new fuel lines (old steel lines rust from inside), fuel pump, filter, and carburetor rebuild. 6-10 hours depending on tank condition.

Estimated cost: $800-1,800

Typical onset: 80,000-150,000 mi

Symptoms: Delayed engagement into drive or reverse, Slipping on 2-3 shift under load, No reverse or erratic reverse operation, Burnt transmission fluid smell and color

Fix: The TH400 (389ci) and TH350 (326ci) are tough but clutch packs, seals, and bushings wear. A proper rebuild with updated friction materials, new bushings, and valve body refresh runs 12-16 hours. R&R transmission, disassemble, inspect hard parts, reassemble with kit, reinstall.

Estimated cost: $1,800-2,800

Typical onset: 100,000+ mi

Symptoms: Deep knocking sound from bottom end, worse when warm, Low oil pressure at idle (below 10 psi hot), Metallic debris in oil or on magnetic drain plug, Sudden loss of oil pressure

Fix: Original Pontiac V8s that haven't been rebuilt show bearing wear from decades of use and oil neglect. Proper fix is engine removal, full teardown, crank inspection/machining if needed, new bearings, rings, gaskets. 25-35 hours for engine R&R and short block rebuild with machine work.

Estimated cost: $3,500-6,000

Typical onset: 90,000-140,000 mi

Symptoms: Blue smoke on startup or deceleration, Excessive crankcase pressure (PCV valve always dirty), Oil consumption over 1 quart per 500 miles, Wet spark plugs on one or more cylinders

Fix: Worn piston rings lose compression and allow oil past. Proper repair requires engine disassembly, honing or boring cylinders, new pistons or rings, and reassembly. Often combined with bearing service since engine is already apart. 30-40 hours for complete engine rebuild with machine work.

Estimated cost: $4,000-7,000

Symptoms: Transmission fluid dripping from radiator area, Low transmission fluid level with no obvious leak at pan, Rust perforation visible on steel cooler lines, Transmission overheating on highway runs

Fix: Original steel cooler lines rust through after decades of road salt and weather exposure. Replace with new pre-bent lines or custom fabricated stainless. Also inspect radiator internal cooler for cross-contamination. 2-3 hours for line replacement, more if radiator needs service.

Estimated cost: $300-600