Dodge B100 Door Lock Kit Guide: 1975-1980
Secure your classic Dodge van by fixing worn or broken door locks.
- Before buying a kit, inspect the plastic clip connecting the lock rod to the latch; it's a common, cheap failure point.
- New aftermarket kits from brands like Standard Ignition are the most practical and reliable solution since OEM parts are unavailable.
- While the door panel is off, thoroughly clean and lubricate the entire internal latch assembly to ensure smooth operation.
- Aftermarket kits come with new keys for the doors, which will not match your existing ignition key.
Signs of a Failing Door Lock
The door locks on a classic van like the B100 see a lot of use. Over time, the mechanical parts wear out. You'll likely notice problems gradually. The most common issue is simply a worn-out lock cylinder that no longer works smoothly with the key.
Check This First: It Might Not Be the Lock Cylinder
Before you buy a whole new kit, it's worth checking the small plastic clips that connect the lock rod to the latch mechanism inside the door. These clips can become brittle and break over time. If the rod has simply popped out of a broken clip, it's a very inexpensive and easy fix. A forum member with a similar Dodge truck found their entire problem was a broken plastic clip, not the lock cylinder itself.
Choosing the Right Aftermarket Part
For a vehicle from this era, finding new original equipment manufacturer (OEM) parts from Mopar is nearly impossible. The choice is between finding a used part from a salvage yard or buying a new aftermarket kit.
- New Aftermarket: This is the most reliable and recommended option. Brands like Standard Ignition produce direct-fit replacement kits that include new lock cylinders, keys, and retaining clips. The quality is generally considered solid for the price, providing good security and restoring function.
- Used OEM: A used lock from a junkyard is a possibility, but it comes with risks. The part is just as old as the one you are replacing and may fail soon. It will also come with a different key, meaning you would need separate keys for your door and ignition.
The available aftermarket brand, Standard Ignition (also known as Standard Motor Products), has a long history of making quality automotive electronics and components. Reviews for their lock products on other vehicles are generally positive, with customers noting good fit and function.
Typical Cost for a 1975-1980 Dodge B100 Door Lock Kit
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket Kit (Standard Ignition) | $22 - $25 |
| New OEM | Not Available |
| Used OEM (Salvage Yard) | $10 - $30 |
| Shop Labor | $75 - $150 |
Pro Tip: Lubricate Everything
While you have the door panel off, clean and lubricate the entire latch mechanism. Forum users with similar Dodge trucks report that old, hardened grease can make the whole assembly stiff or cause it to jam. Spraying the moving parts with a quality lubricant can make the new lock work even more smoothly and prevent future problems.
Frequently Asked Questions (FAQ)
Does the aftermarket kit come with new keys?
Yes, new aftermarket door lock kits come as a set with two new keys. These keys will match both new door lock cylinders, but they will not match your original ignition cylinder.
Will this kit fit both the driver and passenger doors?
Yes, these kits are typically sold as a pair to replace the lock cylinders on both front doors.
Is it difficult to replace a door lock kit myself?
For most DIY mechanics, this is a straightforward job. It requires removing the inner door panel to access the back of the lock. The cylinder is usually held in place by a simple clip. A video showing the replacement on a similar 1979 Dodge truck reveals it's a manageable project. The main challenge can be brittle plastic parts on the door panel itself.
My van has power locks. Will this kit work?
This specific kit is for manual lock systems, which were common on the B100. It replaces the mechanical key cylinder. If your power lock actuator (the electric motor that moves the lock) has failed, this kit will not solve that problem. Power lock issues often stem from the actuator, wiring, or switches.
Technical Specifications
OEM Part Numbers: 2958635
Kit typically includes two door lock cylinders, two matching keys, gaskets, and retaining clips.
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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.