1969 DODGE MONACO

Typical onset: 80,000+ mi or unknown history

Symptoms: Rough idle and hesitation on acceleration, Rattling noise from front of engine on cold start, Backfiring through carburetor, Hard starting when hot, Loss of power at higher RPMs

Fix: Replace timing chain, gears, and tensioner. Also replace oil pump drive gear while in there as they commonly wear together. 4-6 hours labor depending on A/C and power steering setup. Harmonic balancer often needs replacement too if original.

Estimated cost: $600-1,200

Symptoms: Gas smell in engine bay after shutdown, Hard starting when warm, Black smoke on acceleration, Hesitation or flat spot when throttle applied, Fuel dripping from carb into intake

Fix: Carter or Holley carbs from this era need full rebuild kits with updated seals and needle/seat assemblies. Ethanol fuel destroys original materials. 2-3 hours for rebuild, additional 1-2 hours for proper tuning. Consider modern ethanol-resistant kit.

Estimated cost: $300-600

Symptoms: Front end sitting noticeably lower on one or both sides, Clunking from front suspension over bumps, Uneven tire wear on front, Steering pulls to one side, Visible rust or cracking at torsion bar mounting points

Fix: Inspect anchor hex sockets in crossmember for corrosion and cracking—common rust-belt issue. If crossmember is compromised, requires removal and welding repair or replacement. Torsion bars themselves rarely fail but anchors do. 4-8 hours depending on crossmember condition.

Estimated cost: $800-2,000

Symptoms: Transmission won't downshift for passing, Late upshifts under light throttle, No forced downshift when flooring accelerator, Linkage visibly stuck or corroded at carb or transmission

Fix: External kickdown linkage seizes from corrosion or gets bent/disconnected. Inspect entire rod assembly from carb to transmission. Often needs replacement bushings and rods. Adjustment critical after repair. 1-2 hours labor.

Estimated cost: $150-400

Typical onset: 70,000+ mi or sitting periods

Symptoms: Brake pedal slowly sinks to floor when held, Spongy pedal feel even after bleeding, Brake fluid disappearing with no visible leaks, Reduced braking power, Fluid seepage at booster junction

Fix: Single-reservoir or early dual-reservoir master cylinders fail internally. Rebuild kits available but replacement recommended. Check rear wheel cylinders and front calipers while diagnosing. 2-3 hours including bleeding and adjustment.

Estimated cost: $250-500

Symptoms: Alternator light flickering or staying on, Battery repeatedly dying or overcharging, Gauge shows constant high or low voltage, Headlights unusually bright or dim, Bulbs burning out frequently

Fix: Mechanical voltage regulators fail regularly on these old Mopars. Also inspect bulkhead connector for corrosion—major current bottleneck. Regulator replacement is 0.5 hours but bulkhead connector repair adds 2-3 hours if corroded. Electronic regulator conversion recommended.

Estimated cost: $100-450

Symptoms: Visible rust perforation behind rear wheels, Sagging rear suspension mounting points, Cracking paint along rocker panels, Fuel tank strap mounting areas corroded, Rear spring shackles pulling through frame

Fix: Inspect frame rails from rear axle forward—prone to rust from inside out. Repair requires cutting out bad sections and welding in patches or replacement sections. Major structural work: 12-20 hours depending on severity. Not a DIY job.

Estimated cost: $2,500-5,000