Transmission Issues: 8 Signs Your Transmission Needs Repair

Ready to get hands-on with your transmission? Let’s get rolling.

What Are the Signs of Transmission Issues?

Warning Signs to Look Out For

Your vehicle’s transmission is absolutely crucial for the smooth operation of your car. Don’t know what your transmission does? Check out this great video explainer on vehicle transmissions.

Early detection of issues can save you from potentially (very) expensive repairs or even a complete replacement (very costly, not wanted).

Here are eight key warning signs that your transmission might need attention:

1. Unusual Noises: Clunking, Grinding, or Humming

Issue Description:
Hearing strange noises while driving? If your vehicle makes clunking sounds when shifting gears or emits constant grinding or humming noises, these could be signs of transmission trouble. These sounds often indicate worn-out or damaged internal components, such as gears, bearings, or clutch assemblies. Left unchecked, the problem can worsen, leading to more extensive (and expensive) repairs.

Issue Fix:
Start easy. Check your transmission fluid (we will tell you how to do that, so read on). Low or contaminated fluid can cause unusual sounds. If the fluid level is fine, you may need a professional inspection to diagnose worn components. Repairs may involve replacing damaged parts or, in severe cases, rebuilding the transmission. Being proactive, however, can save you a ton, so get on it early if you’re hearing troubling sounds.

2. Leaking Transmission Fluid

Issue Description:
Noticed reddish or brown fluid pooling under your vehicle? The color of the fluid leaking is often a leading indicator of the type of leak your vehicle is experiencing. When it’s red or brown, this is most likely transmission fluid, a critical component that keeps your transmission lubricated and cool. Leaks can occur due to worn seals, loose bolts, or damage to the transmission pan. Driving with insufficient fluid can lead to overheating, increased friction, and severe damage to the transmission system.

Issue Fix:
Inspect the source of the leak. Check around the transmission pan, seals, or lines for visible signs of fluid loss. For a fix – you can easily tighten loose bolts or replace damaged seals with used parts – potentially resolving minor leaks. For more serious leaks, consult a mechanic to replace faulty parts or address underlying issues. Always ensure you refill the lost fluid to the proper level using the correct type specified for your vehicle.

3. Gear Slipping

Issue Description:
Is your car struggling to stay in gear or randomly shifting to neutral? Gear slipping can make driving unpredictable and dangerous, especially during acceleration or climbing hills. This problem often occurs due to low transmission fluid, worn-out clutch plates (in automatic transmissions), or internal failures like faulty solenoids.

Issue Fix:
We’re going to say it again (and again, and again): check your transmission fluid level first (see below). Low or degraded fluid is a common cause of gear slipping. If the fluid level is sufficient, a professional mechanic may need to inspect and replace worn clutch plates or faulty solenoids.

4. Difficulty Shifting Gears

Issue Description:
Are you experiencing delays, grinding, or resistance when shifting gears? This can indicate a transmission issue. Manual transmission drivers might struggle with a stiff clutch or grinding noises, while automatic transmission drivers may feel hesitation or jerking during gear changes. Difficulty shifting is often a sign of low or contaminated transmission fluid, damaged synchronizers, or worn-out clutch components.

Issue Fix:
Begin by checking the transmission fluid level and condition; low or dirty fluid can impair smooth shifting. For manual transmissions, inspect the clutch for wear or damage. If you’re driving an automatic, have a mechanic check for faulty solenoids or internal damage.

5. Dashboard Warning Light

Issue Description:
Is your dashboard warning light on? We talked about this problem in our Engine Issues article, but it goes without saying that a lit transmission warning light (or sometimes the “check engine” light) is your car’s way of signaling trouble. Modern vehicles have sensors that monitor transmission performance, detecting issues like overheating, fluid problems, or gear slipping. Ignoring this light could allow minor problems to escalate into costly repairs.

Issue Fix:
Don’t panic—start by running a diagnostic scan using an OBD-II reader (which you can get on the cheap online and something we HIGHLY recommend), which can pinpoint the exact issue. Many auto parts stores offer free scans, or you can visit a mechanic for a more detailed analysis. Common fixes include adding or replacing transmission fluid, addressing overheating, or repairing faulty sensors.

6. Burning Smell

Issue Description:
Have you noticed a burning smell while driving? This telltale sign most likely signals overheating transmission fluid. When fluid degrades, it loses its ability to cool and lubricate the system, causing excess friction and heat, which is bad news. Left unchecked, this can lead to severe internal damage to your transmission, turning a minor issue into a costly repair.

Issue Fix:
Check your transmission fluid immediately. If it appears dark or has a burnt smell, it’s time to swap that fluid out. Ensure you use the type of fluid specified by your vehicle manufacturer. If the burning smell persists after replacing the fluid, consult a mechanic to diagnose potential overheating or damaged components. Acting swiftly can prevent irreversible damage.

7. Delayed or Rough Engagement

Issue Description:
Does your car hesitate or take a few seconds to move after shifting into gear? This delay, known as rough engagement, can be a significant red flag for transmission issues. It’s often caused by a failing clutch pack, a malfunctioning solenoid, or low fluid pressure within the system. If left unresolved, rough engagement can lead to more severe transmission damage.

Issue Fix:
Start by checking your transmission fluid level and pressure. Low or degraded fluid is a common culprit for delayed engagement. If the fluid is fine, you’ll likely need a professional to inspect the clutch pack or solenoids. Repairs might involve replacing worn components or recalibrating the system to restore proper engagement. Prompt action can save you from larger transmission problems down the road.

8. Shuddering or Vibrating

Issue Description:
Is your car shuddering or vibrating, especially at low speeds? This unsettling symptom often points to transmission problems such as torque converter failure, worn gears, or uneven wear on internal components. A smooth ride should be par for the course, so persistent vibrations are a clear signal that something isn’t working the way it should be.

Issue Fix:
Begin by checking your transmission fluid for proper level and condition, as low or dirty fluid can contribute to shuddering. If the issue persists, have a professional inspect the torque converter or internal components for uneven wear or damage. Depending on the diagnosis, repairs might include replacing the torque converter, addressing internal wear, or even rebuilding the transmission. Acting quickly can prevent further complications.

How to Diagnose Transmission Issues at Home

Easy Steps to Confirm Your Suspicion

Read everything above, and the alarm bells are ringing? Do you think it might be time for a new or used transmission to rectify your problems?

Diagnosing issues at home can save time and provide clarity before seeking professional help. Knowing more about your vehicle and the way it works will always help you have a great relationship with both your vehicle and your mechanic.

Follow these simple steps to identify potential problems:

• Check Transmission Fluid: We’ve mentioned transmission fluid A LOT. Therefore, it’s probably a logical place to start when trying to identify transmission problems. Start by inspecting your transmission fluid. Locate the dipstick (usually marked and near the engine bay). Pull it out, wipe it clean, and reinsert it before pulling it out again to check the level and condition. Healthy fluid should be a bright red and free of burnt smells. If the fluid is dark, smells burnt, or is low, it’s time for a refill or replacement. Thankfully, this is a very easy and quick fix. Check out the video below to see how to change your transmission fluid.

• Look for Fluid Leaks: Everything that goes in your ride should stay in your ride. Inspect the area under your vehicle for any reddish or brown fluid. Transmission fluid leaks often occur around the pan, seals, or gaskets. Catching leaks early can prevent major damage.
• Observe Gear Shifting: Pay attention to how your car shifts gears. If you’re feeling high and dry out on the road, there may be a problem with your transmission. Delayed engagement, slipping gears, or jerking movements when shifting are telltale signs of transmission trouble. Test your vehicle at various speeds to identify irregularities.
• Listen for Unusual Noises: While driving, listen for clunking, grinding, or humming noises. These can signal worn-out gears, bearings, or other internal issues.
• Watch for Dashboard Warnings: Modern vehicles often display warning lights for transmission issues. If the “check engine” or transmission light is on, use an OBD-II scanner (see above) to read the error code and pinpoint the problem.

Why Choose a Used Transmission?

Benefits of Buying Used

Been through everything, and you’re still having transmission issues? Replacing a transmission can feel very overwhelming, especially when considering the high cost of brand-new parts.

That’s where buying a used transmission (or any used part, for that matter) becomes a smart, budget-friendly solution. Let’s explore the top benefits of choosing used:

1. Save Big on Costs

Used transmissions can save you up to 50% compared to the price of a new one. Why spend thousands when you can get a reliable used option that performs just as well? If you’re on a budget, this is one of the most practical choices.

2. High-Quality Options Available

Many used transmissions come from low-mileage vehicles or those salvaged due to non-mechanical damage, such as accidents. Reputable sellers often test and refurbish these parts, ensuring you receive a transmission in excellent working condition.

3. Environmental Impact

Buying used is our favorite thing to do because it is an extremely eco-friendly choice. Nobody likes waste, after all. By reusing parts, you’re reducing waste and conserving resources. It’s a sustainable option that benefits both your wallet and the planet.

4. Availability and Compatibility

Used transmissions are widely available and come in various models and specifications. Whether your car is a few years old or a rare model, chances are you’ll find a suitable used transmission that fits perfectly.

5. Faster Repairs

Since used transmissions are readily available, you can often skip the wait and build times associated with ordering new or remanufactured parts. This means your vehicle can be repaired and back on the road sooner.

Where to Buy a Used Transmission?

Tips for Finding Affordable Options

Shopping for a used transmission doesn’t have to be complicated, but knowing where to look and what to consider can make all the difference. Here’s a guide to finding affordable, high-quality used transmissions.

1. Online Marketplaces

Reputable online platforms like ShopEarl are excellent resources for used transmissions. These platforms offer extensive inventories, detailed product descriptions, and competitive prices. You can also search by make, model, and year to ensure compatibility with your vehicle. This route has our thumbs up.

2. Salvage Yards

Local salvage yards are another option, often housing a variety of used transmissions. While prices may be lower, these parts usually come “as is,” so inspect carefully or bring a mechanic along.

3. Certified Auto Part Dealers

Many dealers specialize in selling tested and certified used transmissions. These come with quality assurance and, often, limited warranties. While slightly pricier, the peace of mind is worth it.

FAQs About Transmission Issues

Common Concerns and Expert Answers

Got questions about transmission problems? Here are answers to some of the most frequently asked questions to help you better understand and address these issues.

1. How Long Does a Transmission Typically Last?

Transmissions can last anywhere from 100,000 to 200,000 miles with proper maintenance. Regular fluid changes, avoiding aggressive driving, and addressing issues early can extend its lifespan significantly.

2. Can I Drive with Transmission Issues?

While it’s possible to drive with minor issues temporarily, it’s not advisable. Ignoring symptoms like slipping gears or overheating can lead to more severe damage and costly repairs.

3. How Can I Prevent Transmission Problems?

Routine maintenance is key. Regularly check and replace transmission fluid, avoid overloading your vehicle, and ensure proper cooling to prevent overheating. Following your car manufacturer’s maintenance schedule is also essential.

4. Is It Worth Replacing a Transmission?

Replacing a transmission can be worthwhile, especially if your vehicle is in good condition overall. Opting for a used transmission can make the repair more affordable and practical.

5. What Are the Costs of a Used Transmission?

The cost of a used transmission varies based on the make, model, and condition. On average, you can expect to pay between $800 and $2,500, plus installation fees.

6. Can I Install a Transmission Myself?

Transmission installation requires expertise, tools, and significant labor. Unless you’re a trained mechanic, it’s best to leave this job to professionals to avoid costly mistakes.

Conclusion

Transmission issues can be daunting, but they don’t have to mean the end of the road for your vehicle—or your budget. By recognizing the early warning signs, such as unusual noises, fluid leaks, or shuddering, you can address problems before they escalate. Diagnosing these issues at home with simple checks like fluid inspections and listening for unusual sounds empowers you to take control of your car’s health.

When repairs are necessary, choosing a used transmission is a smart, cost-effective solution. Not only can you save a significant amount of money, but you’ll also find reliable, high-quality options that are eco-friendly and readily available. Whether you’re shopping through trusted online marketplaces like ShopEarl or exploring local salvage yards, there’s no shortage of options to suit your needs.

Remember, acting quickly is key to preventing minor issues from becoming major problems. Regular maintenance, early diagnosis, and informed decisions can save you time, money, and stress. If you’re ready to make a smart investment in your vehicle’s future, start by exploring affordable used transmissions today.