The 1967 Chevelle is a solid A-body platform, but 55+ years of age means every single one needs metal restoration and has tired drivetrain components. Most common headaches stem from original Powerglide/TH350 transmissions reaching end-of-life, worn-out small-block engines, and rust in floors, quarters, and trunk pans.
Powerglide/TH350 Automatic Transmission Failure
Common · high severityTypical onset: 80,000-150,000 mi on original unit
Symptoms: Slipping on 1-2 shift or no second gear engagement, Burnt transmission fluid smell and dark, gritty fluid, Delayed engagement when shifting into drive or reverse, Leaking from front pump seal or pan gasket
Fix: Full rebuild required in most cases due to worn clutch packs, bands, and hardened seals. Original Powerglides especially suffer from aluminum case porosity and front pump wear. Expect 8-12 labor hours for R&R and rebuild, plus converter if needed. Many shops recommend upgrading to TH350 if still running Powerglide.
Estimated cost: $1,800-3,200
Small-Block V8 Worn Piston Rings and Main Bearings
Common · medium severityTypical onset: 100,000+ mi on original engine
Symptoms: Blue smoke on startup and deceleration, Excessive oil consumption (quart every 500-800 miles), Low oil pressure at idle (under 10 psi hot), Knocking or rumbling from crankshaft area
Fix: Most 283/327/396 engines at this age need full teardown with new rings, bearings, and honing. If cylinders show taper over .010 inch, bore and oversized pistons required. Figure 18-24 hours for complete engine rebuild in-chassis, or 12-16 for R&R and rebuild on stand. Heads typically need valve job simultaneously.
Estimated cost: $3,500-6,500
Frame and Floor Pan Rust-Through
Common · high severitySymptoms: Visible holes in front floor pans under carpet, Soft or flaking metal in trunk floor and rear frame rails, Rust bubbling through rocker panels and quarter panel lower edges, Sagging or cracked frame at torque box areas
Fix: Northeast and Midwest cars almost universally need metal replacement. Front floor pans are 6-8 hours per side with aftermarket panels. Trunk floor adds 8-10 hours. Frame rail replacement (if structurally compromised) is 20+ hours and requires full drivetrain removal. This is the killer expense on project Chevelles.
Estimated cost: $2,500-12,000
Single-Reservoir Master Cylinder Brake Failure
Occasional · high severitySymptoms: Complete loss of braking with single leak anywhere in system, Spongy pedal that goes to floor, Brake fluid leaking from wheel cylinders or steel lines, Pedal fade after repeated applications
Fix: Factory single-reservoir master cylinder means total brake loss if any one circuit fails. Rear wheel cylinders commonly leak and corrode steel lines. Mandatory upgrade to dual-reservoir master ($150-300 parts) plus proportioning valve. Budget 4-6 hours for complete system inspection, master swap, and line replacement. Don't skip rear axle hard lines—they rot from inside out.
Estimated cost: $800-1,500
Fuel Tank Rust and Sender Failure
Common · medium severitySymptoms: Fuel gauge stuck on empty or wildly inaccurate, Fuel leaking from tank seams or filler neck, Rusty debris clogging fuel filter repeatedly, Engine stumbling from sediment blocking pickup sock
Fix: Original steel tanks rust from inside due to ethanol fuel and decades of moisture. Sending units fail from corroded rheostat or broken float arms. Tank replacement requires dropping rear axle or using lift. Figure 4-6 hours for tank R&R, new sender, and fuel line inspection. Replace rubber filler hose simultaneously—they crack and leak.
Estimated cost: $600-1,200
Steering Box Wear and Front Suspension Looseness
Common · medium severityTypical onset: 60,000+ mi on original components
Symptoms: Excessive steering wheel play (more than 2 inches), Wandering on highway requiring constant correction, Clunking over bumps from idler arm or center link, Tire wear on inside or outside edges
Fix: Manual steering boxes develop internal wear that can't be fully adjusted out. Idler arms, tie rod ends, and upper/lower ball joints all wear. Complete front-end rebuild with steering box ($300-600 rebuilt core) takes 8-12 hours including alignment. Power steering cars also leak at pump and gearbox seals.
Estimated cost: $1,200-2,200
Carburetor Rochester Quadrajet Flooding and Leaking
Occasional · low severitySymptoms: Raw fuel smell in garage after sitting, Hard starting when hot due to fuel percolation, Black smoke and rough idle from over-rich mixture, Fuel dripping from accelerator pump or bowl gaskets
Fix: Rochester Q-jets on 396 engines develop leaking floats, worn needle/seats, and hardened pump diaphragms. Complete rebuild kit ($80-120) and 3-4 hours for proper rebuild including float adjustment and tuning. Many mechanics swap to Holley or Edelbrock instead (6-8 hours with intake work).
Estimated cost: $400-900
Buy one if you're prepared for a full restoration or already-restored example; solid platform but every single one needs metalwork and drivetrain attention at this age—no exceptions.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.