A Guide to the Alternator for the 1981-1987 Dodge W350
Keep your classic Dodge workhorse charging strong by choosing the right replacement alternator.
- Symptoms of failure are classic: dimming lights, a battery warning light, and a whining noise from the engine.
- For this truck, the replacement is DIY-friendly, typically taking about an hour with basic tools.
- If you have added accessories like a winch or off-road lights, consider a high-output alternator to meet the extra electrical demand.
- Before replacing the alternator, check the fusible link between the alternator and battery, as a failure there can mimic a bad alternator.
Is Your W350's Alternator Failing?
On a 1981-1987 Dodge W350, the charging system is straightforward, and the signs of failure are usually obvious. If your alternator is on its way out, you'll likely notice one or more of these classic symptoms.
- Dimming or Flickering Headlights: You might see the headlights get dim at idle and then brighten up as you press the gas. This is a classic sign of a weak alternator.
- Battery Warning Light: Your dashboard might have a light shaped like a battery or one that says "ALT" or "GEN". If this light stays on while driving, it's telling you there's a problem with the charging system.
- A Whining or Grinding Noise: Bad bearings inside the alternator can cause a distinct whining or grinding sound that changes with engine speed.
- Dead Battery: The alternator is supposed to recharge your battery. If you find yourself with a dead battery often, the alternator is a likely culprit.
- Slow or Failing Electronics: Power windows that are slow, a weak heater fan, or a radio that cuts out are all signs the alternator isn't providing enough power.
Choosing the Right Aftermarket Alternator
For a truck from this era, finding a brand-new OEM part from Dodge is nearly impossible. The market consists of new aftermarket parts and remanufactured units. Aftermarket quality can be very good, often meeting or exceeding the original specifications from the 1980s. Here’s a look at the brands available and what to consider.
Understanding Amperage
The most important specification for your alternator is its amperage (amp) rating. A stock alternator is fine for a factory truck. However, if your W350 has a snow plow, a winch, extra off-road lights, or a powerful stereo system, you should consider a high-output alternator. These can provide more power at idle to keep up with heavy electrical loads.
Brand Quality & Tiers
When shopping for a new alternator, you'll find a few common brands. Quality can vary, so it's good to know their reputation.
- Performance/High-Output (Powermaster): Powermaster specializes in high-output alternators, which are great if you run a lot of accessories. However, owner reviews are mixed. Some users report excellent performance, while others have experienced early failures and quality control issues like bad bearings or poor internal assembly. This is an option for those who need the extra power and are aware of the potential for issues.
- Standard Aftermarket Replacements (Remy, MPA): Remy is a long-standing brand that was once part of GM. It is generally considered a reliable, standard replacement option by many users. MPA (Motorcar Parts of America) is another major supplier, known for its Quality-Built brand, which emphasizes testing to meet OE standards. Both are solid choices for a daily driver or stock vehicle.
- Remanufacturers (BBB Industries): BBB Industries is a large company that remanufactures alternators and owns several other brands. Their products are widely available. Quality is generally seen as decent, but like any remanufactured part, there is a chance of getting a bad unit.
Pro Tip: Check the Fusible Link
On these older Dodge trucks, there is a fusible link (a special section of wire designed to burn out like a fuse) between the alternator and the battery. If this link fails, the alternator cannot charge the battery, even if the alternator itself is perfectly fine. If you install a new alternator and the battery still isn't charging, inspect this wire carefully.
Typical Costs for a 1981-1987 Dodge W350 Alternator
| Part Type | Typical Price Range |
|---|---|
| New Aftermarket Alternator | $85 - $153 |
| Remanufactured Alternator | $75 - $140 |
| Shop Labor for Installation | $100 - $200 |
Frequently Asked Questions
Is it hard to replace the alternator on a 1981-1987 W350?
No, it is a relatively easy job for someone with basic mechanical skills. The alternator is usually located on the top of the engine and is easy to access. It involves disconnecting the battery, removing the drive belt, unplugging a few wires, and taking off two or three bolts. Most DIY mechanics can do it in about an hour.
Do I need a special high-output alternator?
Only if you have added significant electrical accessories. If your truck is mostly stock, a standard replacement alternator will work perfectly. If you have a winch, a large stereo amplifier, or multiple large off-road lights, a high-output model is a wise investment to prevent dimming lights and keep the battery charged.
How can I test my alternator?
The easiest way is with a simple voltmeter. With the engine running, touch the voltmeter probes to the positive and negative battery terminals. A healthy charging system should read between 13.7 and 14.5 volts. If the voltage is down near 12 volts or lower, the alternator is likely not working.
Are there any recalls for the alternator on my truck?
No, searches of the NHTSA database show no open recalls for the alternator on the 1981-1987 Dodge W350. Recalls for Dodge alternators are for much newer models.
Technical Specifications
Externally regulated. Available in standard output (approx. 60-78 Amps) and high-output aftermarket versions (140 Amps or more). Uses a V-belt pulley.
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.
- Dodge W350: