1976 PONTIAC GRAND PRIX

Typical onset: 80,000-140,000 mi

Symptoms: Blue smoke on startup and acceleration, Quart-per-500-miles oil consumption, Carbon buildup on spark plugs, Failed emissions testing

Fix: Rings alone run 12-16 hours if bores are good; most need a full rebuild with bore/hone at this age. Pistons, bearings, timing set while you're in there. Figure 25-35 shop hours for proper rebuild.

Estimated cost: $2,800-4,500

Typical onset: any mileage—age-related

Symptoms: Trans fluid puddles under radiator area, Sudden loss of fluid and slipping gears, Pink milkshake in radiator if internal cooler fails, Overheating transmission

Fix: Steel lines rust through at frame crossmember or fittings. Replace both lines, not just the leaker—other side is next. 2-3 hours labor. If cooler failed internally and mixed fluids, you're rebuilding the transmission too.

Estimated cost: $250-450 for lines only, $1,800-2,800 if trans contaminated

Symptoms: Rough idle and stalling when warm, Hesitation off-idle, flat spots, Black smoke and fuel smell—flooding, Hard starting after sitting

Fix: The '76 Q-jet has every emission gizmo GM could bolt on—EGR, AIR pump integration, early evap controls. Full rebuild kit plus proper adjustment takes 4-6 hours if you know these carbs. Most shops just swap for a reman core.

Estimated cost: $450-750

Typical onset: 60,000-100,000 mi

Symptoms: Clunk when shifting into gear, Vibration at idle in Drive, Visible tail housing sag, Driveline vibration under load

Fix: Rubber separates from metal or tears completely. Replace transmission mount and inspect engine mounts at same time—they're all the same age. 1.5-2 hours with proper jack positioning.

Estimated cost: $180-300

Symptoms: Intermittent stalling and no-restart, Surging at highway speed, Fuel starvation under load, Hard starting when hot

Fix: Old fuel turns to varnish in tank, lines, filter, and carb. If it's been sitting, budget for tank boil-out or replacement ($300-600), new fuel pump ($120-180 installed), lines flushed, filter, and carb cleaning. Don't chase ghosts—start with fresh fuel system.

Estimated cost: $500-1,200 depending on tank condition

Typical onset: 120,000-180,000 mi

Symptoms: Slipping in 2nd gear or on 2-3 shift, Delayed engagement into Drive or Reverse, No 3rd gear or stuck in 2nd, Burnt fluid smell and dark color

Fix: These transmissions are bulletproof until the clutch packs glaze or the 2nd gear band adjusts out. Full rebuild with converter runs 14-18 hours. Bands, clutches, seals, filter, and converter—do it right once.

Estimated cost: $1,800-2,600

Symptoms: Stalling in traffic on hot days, Won't restart until engine cools 20+ minutes, Runs fine in morning, dies in afternoon heat, Fuel pump clicking but not delivering

Fix: Fuel lines route too close to exhaust manifolds. Heat shields missing or collapsed. Reroute hard lines away from heat, add insulation sleeves, verify mechanical fuel pump isn't cavitating. 2-3 hours troubleshooting and fixing. Some guys add electric pusher pump as bandaid.

Estimated cost: $200-450