Dodge Ramcharger Speedometer Cable Replacement Guide (1979-1985)
If your speedometer needle is bouncing, noisy, or dead, it's time to look at replacing the speedometer cable.
- Symptoms of failure include a bouncing needle, squealing noises from the dash, or a speedometer that reads zero.
- Aftermarket is the primary source for this part. Standard brands like ATP and Pioneer are affordable, while Lokar offers a premium, cut-to-fit option.
- Always lubricate the new inner cable with grease before installation to ensure smooth operation and prevent noise.
- Replacement is a feasible DIY project that involves detaching the cable from the cluster and the transmission.
Is Your Speedometer Acting Up?
A faulty speedometer cable is a common issue on older trucks like the 1979-1985 Dodge Ramcharger. Over decades of use, the internal cable can dry out, kink, or snap. The outer housing can also get brittle, melt from engine heat, or get damaged. When this happens, you'll notice some obvious signs while driving.
Common Failure Symptoms:
- Bouncing Speedometer Needle: The needle jumps around erratically instead of moving smoothly. This is often the first sign the cable is binding or needs lubrication.
- Squealing or Grinding Noises: You may hear a squealing or whining sound from behind the dashboard that changes with vehicle speed. This is the sound of the dry cable spinning inside its housing.
- No Speed Reading: The speedometer needle doesn't move at all and stays at 0 MPH. This usually means the inner cable has snapped completely.
No Recalls or TSBs Found
There are no active recalls or Technical Service Bulletins (TSBs) from the NHTSA for the speedometer cable on the 1979-1985 Dodge Ramcharger. Failures are typically due to normal wear and tear over many years.
Choosing the Right Aftermarket Cable
Finding a new OEM Mopar cable is nearly impossible, so the aftermarket is your go-to source. There are different quality tiers available to fit your budget and needs.
| Brand Tier | Brands | Price Range | Description |
|---|---|---|---|
| Good (Standard Replacement) | ATP, Pioneer Cable | $20 - $40 | These are direct-fit, OE-style replacements that get the job done. They are affordable and widely available. However, quality can be inconsistent; some may be slightly too long or require extra lubrication before installation for smooth, quiet operation. |
| Best (Premium/Custom) | Lokar | $120 - $150+ | Lokar cables are a high-end option made with superior materials like PTFE-lined housings and stainless steel braiding. They are a "cut-to-fit" design, which means you trim the cable and housing to the exact length your truck needs. This provides a perfect fit and is ideal for modified trucks or for owners who want the best durability. |
Pro Tip: Lubricate Your New Cable
Regardless of which brand you choose, it's a smart move to lubricate the new inner cable before you install it. Pull the inner cable out of the housing, apply a thin coat of white lithium grease or specific cable lube, and slide it back in. This small step prevents noise and ensures a long service life.
Frequently Asked Questions
Is replacing a speedometer cable a difficult job?
No, it's a job most DIYers can handle. The main challenges are accessing the back of the instrument cluster, which can be tight, and routing 🎬 See this walkthrough for accessing and repairing the instrument cluster. the new cable. No special tools are usually required beyond basic hand tools.
How do I know what length cable to buy?
The best way is to remove your old cable and measure it. Some aftermarket cables are sold as universal or "fits-all" and may be longer than necessary. If you have cruise control or 4WD, you may need a specific cable, so check the part description carefully.
🎬 Watch: How to assemble a custom push-on Chrysler speedometer cable.What's the difference between a cheap and an expensive cable?
The difference comes down to materials and design. Less expensive cables use standard plastic housings and may have less lubrication. Premium cables like those from Lokar use PTFE liners for smooth operation, higher-quality fittings, and durable braided stainless steel housings. The "cut-to-fit" design of premium cables also ensures a perfect length without slack.
My cable is new but the speedometer still doesn't work. What else could be wrong?
If a new cable doesn't fix the problem, check the plastic speedometer drive gear inside the transmission or transfer case. These small plastic gears can strip or melt over time, and if they aren't spinning, the cable won't either. In rarer cases, the speedometer gauge head itself could be faulty.
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Technical Specifications
OEM Part Numbers: 4312353
Mechanically driven cable, typically with a 5/8-18 or 7/8-18 threaded fitting at the transmission and a spring clip or threaded fitting at the speedometer head. Length varies by application (2WD/4WD, cruise control).
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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.