The 1974 Charger marks the end of the B-body's golden era, built during Chrysler's cash-strapped mid-'70s with cost-cutting showing in wiring, interior hardware, and some fasteners. The drivetrains are generally bulletproof, but corrosion, electrical gremlins, and worn-out suspension bushings plague survivors.
Timing Chain Stretch and Failure (V8 engines)
Common · high severityTypical onset: 80,000-120,000 mi
Symptoms: Rattling on cold starts from timing cover area, Hard starting or no-start after sitting, Backfiring through carburetor, Loss of power and rough idle as retarded timing worsens
Fix: Replace timing chain, gears, and damper. Chrysler's nylon-toothed cam gears shed teeth over time. Requires front accessories removal, harmonic balancer puller, and timing cover gasket replacement. Budget 4-6 hours labor depending on A/C and power steering configuration.
Estimated cost: $600-1,200
Floor Pan and Frame Rail Rust-Through
Common · high severitySymptoms: Visible holes in driver/passenger floor pans, Soft or crumbling metal around torque box area, Rear frame rail separation near leaf spring mounts, Trunk floor wet or rusted through near quarter panel seams
Fix: Rust belt and coastal cars suffer catastrophic floor and frame rot. Proper repair requires cutting out bad metal and welding in replacement panels—easily 20-40 hours depending on extent. Many survive with cosmetic patches over structural rot, which is dangerous. Pre-purchase inspection under the car is critical.
Estimated cost: $3,000-8,000
Bulkhead Connector Melting and Electrical Failures
Common · medium severitySymptoms: Intermittent gauge failure or dead gauges, Ammeter pegged or not working, Smell of burning plastic behind dash, Headlights dimming during accessory use, No-start with good battery
Fix: The firewall bulkhead connector carries high current through marginal terminals that corrode and overheat. Terminals melt the connector housing, causing voltage drop and fire risk. Proper fix involves disassembly, terminal cleaning/replacement, dielectric grease, and sometimes bypassing failed circuits. 3-5 hours labor plus potential dash removal for related harness damage.
Estimated cost: $400-900
Worn Torsion Bar Bushings and Upper Control Arm Pivots
Common · medium severityTypical onset: 70,000-100,000 mi
Symptoms: Clunking over bumps from front suspension, Wandering steering and poor return to center, Uneven tire wear on inside edges, Excessive body roll in turns
Fix: Upper control arm pivot shafts wear bushings and the K-member bores elongate. Lower torsion bar sockets also wear. Full rebuild requires pressing bushings, reaming/sleeving K-member, and replacing all pivot hardware. Alignment mandatory after. 8-10 hours labor for complete front-end rebuild.
Estimated cost: $1,200-2,000
Carter Thermoquad Carburetor Warpage and Leaks
Occasional · medium severitySymptoms: External fuel leaking from throttle body seam, Hard starting when hot, Stumble or bog on acceleration, Raw fuel smell in engine bay
Fix: The Thermoquad's plastic main body warps from heat cycles, causing fuel leaks between halves and poor metering. Rebuilding requires specialized knowledge; most techs swap to an Edelbrock or Holley. Rebuild kits exist but success is hit-or-miss. If keeping original, budget 3-4 hours for rebuild attempt. Replacement carb swap is 1-2 hours.
Estimated cost: $350-700
Door Hinge Pin Wear and Sagging Doors
Common · low severitySymptoms: Doors drop when opened, requiring lift to close, Gap misalignment at rear of door, Door striker engagement issues, Wind noise from poor door seal
Fix: Heavy B-body doors wear hinge pins and bushings. Pins groove and bushings oval out. Proper repair uses oversize hinge pin kits with reaming/bushing replacement. Door must be supported during work. 2-3 hours per door, alignment required after.
Estimated cost: $300-600
Fuel Tank Sending Unit and Pickup Tube Failures
Occasional · medium severitySymptoms: Fuel gauge reads empty or full constantly, Erratic gauge readings, Engine starvation with 1/4 tank or more showing, Fuel smell from tank area
Fix: Tank-mounted sending units corrode internally, pickup socks clog with rust, and float arms break. Often discovered when tank is dropped for other reasons. Requires tank removal (2-3 hours), sending unit replacement, and usually tank cleaning or replacement if rusty inside. Good time to replace all fuel hoses.
Estimated cost: $500-1,000
Buy one if rust-free and you can wrench—mechanicals are simple and parts still exist, but electrical and body integrity are the deal-breakers on most survivors.
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.