The Retrax Pro MX is a popular tonneau cover designed to protect truck beds and their contents.
While many owners enjoy this product without any hitches, some have encountered various issues.
If you’re a current owner or considering purchasing one, you might be wondering about potential problems.
Don’t worry – I’ve got you covered. In this article, I’ll walk you through the most common Retrax Pro MX problems and offer practical solutions.
Many of these fixes are straightforward, so even if you’re not particularly handy, you should be able to tackle them.
Let’s dive in and explore how to keep your Retrax Pro MX in top shape.

Retrax Pro MX Problems: Common Issues and Solutions
Difficulty Opening and Closing

One of the most frequently reported issues with the Retrax Pro MX is difficulty in opening and closing the cover smoothly.
This can be frustrating, especially when you need quick access to your truck bed. Here’s what might be causing this problem and how you can fix it:
Misalignment
Sometimes, the cover may not be properly aligned with the truck bed, causing it to stick or jam when you try to open or close it. To address this:
- Check the side rails to ensure they’re level and parallel.
- Loosen the clamps holding the rails in place.
- Adjust the position of the rails slightly.
- Retighten the clamps and test the cover’s movement.
Debris in the Tracks
Dirt, leaves, or small rocks can accumulate in the tracks, impeding the cover’s smooth operation. To solve this:
- Open the cover fully.
- Use a soft brush or compressed air to clean out the tracks.
- Apply a silicone-based lubricant to the tracks.
- Open and close the cover several times to distribute the lubricant.
Temperature Effects
In extreme temperatures, the cover material may expand or contract, affecting its operation. While you can’t control the weather, you can:
- Open and close the cover slowly in very hot or cold conditions.
- Store your truck in a garage or shaded area when possible.
- Consider applying a UV protectant to the cover to minimize sun damage.
Water Leakage Issues

A leaky tonneau cover defeats one of its primary purposes – keeping your truck bed dry. If you’re experiencing water leakage with your Retrax Pro MX, try these solutions:
Check the Seals
Over time, the rubber seals around the edges of the cover can wear down or become damaged. To address this:
- Inspect the seals for any visible damage or wear.
- Clean the seals with a mild soap solution and dry thoroughly.
- Apply a rubber conditioner to keep the seals pliable.
- If seals are damaged, contact Retrax for replacement parts.
Adjust the Tension
If the cover isn’t tight enough, water can seep in through gaps. To fix this:
- Locate the tension adjustment screws at the front of the cover.
- Use a flathead screwdriver to tighten the screws slightly.
- Test the cover’s tightness – it should be snug but not difficult to open or close.
Clear the Drain Tubes
The Retrax Pro MX has built-in drain tubes to channel water away from the truck bed. If these become clogged, water can back up and leak into the bed. To clear them:
- Locate the drain tubes at the front corners of the truck bed.
- Use a piece of wire or compressed air to clear any blockages.
- Flush the tubes with water to ensure they’re completely clear.
Heat Retention in Sunny Conditions

Some users have reported that the Retrax Pro MX can get extremely hot in sunny weather, making it uncomfortable to touch and potentially damaging items in the truck bed. Here’s how to mitigate this issue:
Use a Reflective Cover
When parked in direct sunlight for extended periods, consider using a reflective cover over your Retrax Pro MX. This can significantly reduce heat absorption.
Install Thermal Insulation
You can add a layer of thermal insulation beneath the cover:
- Purchase automotive-grade thermal insulation material.
- Cut it to fit the underside of your Retrax Pro MX.
- Attach it using automotive-grade adhesive.
Park in Shade When Possible
While not always feasible, parking in shaded areas can greatly reduce heat buildup. If you frequently park in sunny spots, consider installing a truck bed shade sail for additional protection.
Misalignment During Installation

Proper installation is crucial for the Retrax Pro MX to function correctly. If you’re experiencing misalignment issues, try these steps:
Double-Check the Instructions
It’s easy to miss a step during installation. Carefully review the instruction manual and ensure you’ve followed each step correctly.
Measure Twice, Install Once
Before securing any components:
- Measure the distance between the rails at multiple points.
- Ensure the rails are parallel to each other and perpendicular to the truck bed.
- Use a level to check that the rails are even on both sides.
Adjust the Shims
Retrax provides shims to help level the cover on uneven truck beds:
- Place shims under the rails where needed to achieve a level installation.
- Start with thin shims and add thicker ones if necessary.
- Recheck alignment after adding shims before final tightening.
Locking Mechanism Problems

A faulty locking mechanism can compromise the security of your truck bed contents. Here’s how to address common locking issues:
Lubricate the Lock
If the key is difficult to turn or the lock feels stiff:
- Clean the lock with a dry cloth to remove any debris.
- Apply a graphite-based lubricant (avoid oil-based lubricants as they can attract dirt).
- Insert and remove the key several times to distribute the lubricant.
Align the Latch
If the cover doesn’t lock properly when closed:
- Check the alignment of the latch with the locking mechanism.
- Loosen the bolts holding the latch in place.
- Adjust the latch position slightly.
- Retighten the bolts and test the lock.
Replace Worn Components
Over time, parts of the locking mechanism may wear out:
- Inspect the lock for any visible damage or wear.
- Check for loose or missing screws.
- If parts appear worn or damaged, contact Retrax for replacement components.
Drain Plug and Hose Ineffectiveness

Properly functioning drain plugs and hoses are crucial for preventing water accumulation. If you’re experiencing issues:
Clean the Drain System
Debris can clog the drain plugs and hoses:
- Remove the drain plugs.
- Use a small brush to clean out any debris.
- Flush the drain hoses with water to clear any blockages.
- Consider using a mild detergent solution for stubborn clogs.
Check for Damage
Inspect the drain plugs and hoses for any cracks or damage:
- Look for signs of wear or splitting in the hoses.
- Check that the drain plugs fit snugly in their openings.
- Replace any damaged components with Retrax-approved parts.
Improve Drainage
If water isn’t draining effectively:
- Ensure your truck is parked on a level surface.
- Consider slightly angling the front of the cover downward during installation to promote better drainage.
- Regularly clean the truck bed to prevent debris from clogging the drains.
Space Consumption in Short Truck Beds

The Retrax Pro MX can take up significant space in shorter truck beds. While you can’t change the cover’s design, you can maximize your remaining space:
Organize Your Truck Bed
Use storage solutions designed for truck beds:
- Install a truck bed organizer to make efficient use of the available space.
- Use tie-down straps to secure items vertically against the bed walls.
- Consider a truck bed extender for occasions when you need extra space.
Adjust Your Loading Strategy
Think creatively about how you load your truck:
- Place frequently used items towards the tailgate for easy access.
- Use soft, collapsible containers that can conform to the available space.
- For long items, consider using a bed extender or leaving the cover partially open (when safe to do so).
Resistance When Rolling the Cover

If you’re experiencing resistance when rolling the cover, it can make using your Retrax Pro MX a chore. Here’s how to address this issue:
Lubricate the Rollers
Over time, the rollers can become stiff:
- Open the cover fully to access the rollers.
- Clean the rollers with a dry cloth to remove any debris.
- Apply a silicone-based lubricant to each roller.
- Roll the cover back and forth to distribute the lubricant.
Check for Obstructions
Sometimes, small objects can interfere with the cover’s movement:
- Inspect the tracks for any debris or small objects.
- Use compressed air or a soft brush to clean out the tracks.
- Check that the cover material isn’t catching on any part of the truck bed.
Adjust the Spring Tension
If the cover feels too tight or too loose:
- Locate the spring tension adjustment at the front of the cover.
- Use a flathead screwdriver to adjust the tension slightly.
- Test the cover’s movement and readjust as necessary.
Quality Control Concerns
While Retrax is known for quality products, occasional manufacturing issues can occur. If you suspect a quality control problem:
Document the Issue
- Take clear photos or videos of the problem.
- Write a detailed description of what you’re experiencing.
- Note the date of purchase and where you bought the cover.
Contact Retrax Support
Reach out to Retrax customer support:
- Provide them with your documentation.
- Ask about warranty coverage for your specific issue.
- Inquire about replacement parts or repair options.
Consider Professional Installation
If you’re unsure about your DIY skills:
- Look for certified Retrax installers in your area.
- Ask about their experience with your specific model.
- Inquire about any guarantees they offer on their work.
Weathering of Plastic Components

Exposure to the elements can cause plastic parts to degrade over time. To minimize this:
Apply UV Protectant
Regularly apply a UV protectant spray:
- Clean the plastic components thoroughly.
- Apply the UV protectant according to the product instructions.
- Reapply every few months, especially in sunny climates.
Clean Regularly
Keeping your cover clean can prevent premature wear:
- Wash the cover with mild soap and water regularly.
- Avoid harsh chemicals that can damage the plastic.
- Dry the cover thoroughly after washing to prevent water spots.
Consider a Cover for Your Cover
When parked for extended periods:
- Use a breathable cover designed for tonneau covers.
- Ensure the cover is completely dry before applying the additional cover.
- Remove the extra cover regularly to allow the Retrax Pro MX to “breathe.”
Final Thoughts
While the Retrax Pro MX is a popular and generally reliable tonneau cover, it’s not without its potential issues.
By understanding these common problems and their solutions, you can keep your cover in top condition and enjoy its benefits for years to come.
Remember, regular maintenance is key to preventing many of these issues.
If you encounter a problem you can’t solve, don’t hesitate to reach out to Retrax support or a professional installer.
With proper care and attention, your Retrax Pro MX can provide excellent protection and functionality for your truck bed.