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1978 Dodge D100 1978 Custom Extended Cab Pickup

Repair services & inexpensive new parts for 1978 Dodge D100 1978 Custom Extended Cab Pickup with 6.6L 6556CC 400Cu. In. V8 GAS OHV Naturally Aspirated engine.

The 1978 Dodge D100 Custom Extended Cab Pickup is a classic American truck, known for its robust V8 engine and sturdy build. This model features a 6.6L (400 Cu. In.) V8 GAS OHV naturally aspirated engine, delivering reliable power and performance typical of Dodge's craftsmanship of that era. As a rear-wheel-drive vehicle, it offers a traditional driving experience that appeals to vintage truck enthusiasts. With its extended cab design, this truck provides additional interior space, making it more versatile for both work and leisure. Maintaining such a vintage vehicle involves understanding its common issues and ensuring proper upkeep to preserve its classic charm and functionality. 1978 Dodge D100 Custom Overview

Common Issues

  • Rust, especially around the wheel wells and undercarriage.
  • Worn-out suspension components due to age.
  • Engine oil leaks, often from the valve cover gaskets.
  • Electrical issues, particularly with the ignition and lighting systems.
  • Cooling system problems, including radiator and water pump failures.

Maintenance Tips

  • Regularly check and replace engine fluids, including oil, coolant, and transmission fluid.
  • Inspect and service the brake system, including pads, rotors, and lines.
  • Maintain the suspension system by replacing worn bushings and shocks.
  • Keep the body and undercarriage clean to prevent rust.
  • Check the electrical system periodically and ensure all connections are secure.

Typical Repair/Ownership Cost Ranges

  • Engine repairs: $500 - $2,500 depending on the extent of the work.
  • Transmission services: $300 - $1,200.
  • Suspension repairs: $200 - $1,000.
  • Bodywork (rust repair): $500 - $3,000.
  • Electrical system fixes: $100 - $500.

Buying Advice

  • Inspect for rust in critical areas like the frame and floor pans.
  • Check the condition of the engine and listen for any unusual noises.
  • Test drive to assess the transmission and braking system.
  • Verify the functionality of all electrical components.
  • Review the maintenance history for signs of regular upkeep.

Frequently Asked Questions

  • How fuel-efficient is the 1978 Dodge D100? This truck is not known for fuel efficiency, averaging around 10-15 MPG.
  • What type of oil does the engine require? It is recommended to use 10W-30 or 10W-40 conventional oil.
  • Can modern parts be used in repairs? Many aftermarket parts are available, but some original components might require sourcing from specialty suppliers.
  • Is the 1978 Dodge D100 reliable for daily use? With proper maintenance, it can be reliable, but it lacks modern conveniences and safety features.
  • What should I look for in a used 1978 Dodge D100? Focus on rust condition, engine health, and maintenance history.
  • How difficult is it to find parts for the D100? Parts are generally available from specialty and vintage auto parts suppliers.

Have Questions about Dodge D100 1978 Custom? Ask the assistant for questions about mileage, performance, repairs, parts, recommended maintenance and more.


Make: Dodge
Model: D100
Trim: Custom Extended Cab Pickup 2-Door
Year: 1978

Quick Info

Fuel: GAS
Aspiration: Naturally Aspirated
Engine Displacement: 6.6L
Engine CC: 6556
Engine CID: 400
Engine Block Type: V
Cylinder Type: OHV
Cylinders: 8
Drive: RWD
Body Type: Extended Cab Pickup
Doors: 2

Repair services & inexpensive new parts for 1978 Dodge D100 1978 Custom Extended Cab Pickup with 6.6L 6556CC 400Cu. In. V8 GAS OHV Naturally Aspirated engine.