Dodge RD200 Door Lock Kit Replacement Guide for 1978-1980 Models
Secure your classic Dodge truck by replacing worn or broken door lock cylinders.
- Failure is purely mechanical; there are no recalls or electronics involved.
- Before replacing the entire kit, inspect the small plastic clip connecting the lock rod inside the door, as it is a common and cheap failure point.
- Replacement is a simple DIY job requiring basic hand tools and about an hour of your time.
- Always replace both door lock cylinders as a pair to ensure one key works for both doors.
Signs of a Failing Door Lock Cylinder
On a classic truck like the Dodge RD200, the door locks are simple and durable, but they can wear out after decades of use. Symptoms are usually straightforward and point to a mechanical issue inside the door.
- Key is Hard to Turn: If you have to jiggle the key or use a lot of force to lock or unlock the door, the tumblers inside the cylinder are likely worn or dirty.
- Key Won't Go In or Comes Out: A very worn lock cylinder might not allow the key to be inserted fully, or it may be so loose that the key falls out.
- Lock Doesn't Work from Outside: The key turns, but nothing happens. This could be the lock cylinder itself, but more commonly on these trucks, it's a small, inexpensive plastic clip that has broken. This clip connects the lock cylinder to the internal door latch rod.
Pro Tip: Check the Rod Clip First
Before buying a new lock kit, it's worth taking off the interior door panel to inspect the lock mechanism. A common point of failure is the small plastic or metal clip that attaches the lock rod to the back of the cylinder. In a YouTube video featuring a 1979 Dodge D-150, the owner found this broken clip was the actual problem, not the lock cylinder. These clips are often available in variety packs at auto parts stores.
Choosing an Aftermarket Door Lock Kit
For a vehicle from this era, finding new original equipment (OEM) parts from a dealer is not possible. The market consists of new aftermarket parts and used OEM parts from salvage yards.
- New Aftermarket (Recommended): Brands like Standard Ignition (also known as Standard Motor Products) offer direct-fit replacement door lock kits. These kits are affordable and made to match original specifications with materials like brass tumblers and die-cast zinc cores. A review noted that Standard Ignition products are reliable and fit correctly. This is the most practical and reliable option.
- Used OEM: You might find original locks at a junkyard. However, they will be just as old as the ones you are replacing and will likely not come with a key, requiring a locksmith to re-key them. This is generally not a cost-effective or reliable solution.
| Part Type | Part Cost | Shop Labor Cost | Total Cost |
|---|---|---|---|
| New Aftermarket (Standard Ignition) | $22.82 | $100 - $200 | $123 - $223 |
| Used OEM | $10 - $30 (plus re-keying) | $100 - $200 | $110 - $230+ |
Frequently Asked Questions (FAQ)
Is replacing the door lock kit a DIY job?
Yes, this is a very DIY-friendly project for a beginner. The process involves removing the inner door panel, which is held by a few screws and clips. You then release a retaining clip, pull the old lock cylinder out from the outside, and install the new one. The job typically takes less than an hour per door.
Do I need to replace both door locks at the same time?
It is highly recommended. Aftermarket kits come with two matching lock cylinders and a single set of keys. Replacing both at once ensures you can use the same new key for both doors. If you only replace one, you will need to carry your old key for one door and your new key for the other.
Are there any recalls for the door locks on a 1978-1980 Dodge RD200?
No. Searches of the National Highway Traffic Safety Administration (NHTSA) database show no recalls or technical service bulletins (TSBs) for the door locks on the RD200 or related D-series trucks. Any failures are due to the age and normal wear of these mechanical parts.
Will this kit also replace my ignition lock?
No, this specific door lock kit is only for the doors. The ignition lock cylinder is a separate part. While some manufacturers offer complete sets that include door and ignition locks keyed alike, this kit only addresses the doors.
Technical Specifications
Kit includes two (2) door lock cylinders, two (2) matching keys, and installation clips. The locks are chrome-plated and feature die-cast zinc cores with brass tumblers.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.