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Made in USA
Keeping It Cool — Performance Cast Aluminum Differential Covers, Transmission Pans & Valve Covers, Made in USA Since 1986
Why Choose PML
Made in USA
Proudly designed and manufactured in California
Since 1986
Over 40 years experience
Premium Quality
Heavy duty sand cast aluminum construction for strength and heat transfer
Performance Focused
Engineered for cooling with logo-free full fin designs and shapes similar to OEM
Thousands of Applications
Parts for domestic and import vehicles
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Welcome to PML YourCovers
Premium Sand Cast Aluminum Automotive Products Engineered for Performance Since 1986
PML designs and manufactures premium sand castings for automotive enthusiasts, gear shops, restorers, performance parts companies, and everyday drivers. Every product is engineered and made in Southern California using decades of manufacturing experience, high-quality materials, and a commitment to delivering long-lasting performance.
PML specializes in heavy duty differential covers, transmission pans, valve covers, and specialty automotive components designed to improve serviceability, cooling performance, and overall vehicle reliability. Whether you're towing heavy loads, racing at the track, restoring a classic vehicle, or maintaining your daily driver, our products are built to perform under demanding conditions.
Unlike many aftermarket manufacturers, PML designs, engineers, and manufactures the products we sell. This allows us to maintain exceptional quality standards while continually refining our products based on real-world testing, customer feedback, and engineering expertise. Knowledgeable customer support is a cornerstone of PML. Our experienced staff is available by phone and email to assist before and after your purchase.
As proud members of SEMA and ATRA, we remain committed to developing products that meet the expectations of automotive professionals and enthusiasts alike. From our manufacturing facility in Southern California, we continue to build products that combine functionality, durability, and premium craftsmanship.
Our mission has always been simple: build products that improve vehicle performance, protect critical drivetrain components, and provide customers with dependable solutions they can trust for years to come.
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Frequently Asked Questions
View All FAQs ›Why should I upgrade my differential cover?
Upgrading to a sand cast aluminum differential cover promotes cooler fluid temperatures during hauling, towing, and other demanding applications. When fluid gets hot, it breaks down, which reduces its lubrication properties, increasing wear and tear on the gears. A sand cast aluminum differential cover increases heat dissipation since aluminum has high thermal conductivity and the fins and sand cast construction increase the surface area compared to factory stamped steel covers. A drain makes servicing easy since new, clean fluid can replace old fluid without removing the cover. Thick, machined-flat flanges provide a superior sealing surface that won't tweak or bend, for a leak-free seal. Many PML differential covers also increase fluid capacity while maintaining a curved shape similar to stock. Some customers purchase our differential covers solely for looks.
What are the benefits of a sand cast aluminum transmission pan?
Sand cast aluminum transmission pans are designed to dissipate heat more effectively than factory transmission pans. In addition to sand cast aluminum construction, many applications also feature increased fluid capacity and logo-free cooling fin designs, which further aid heat dissipation.
Are PML products made in the USA?
Yes. PML proudly designs and manufactures its products in Southern California using premium materials and decades of engineering experience.
Which vehicles do PML products fit?
PML manufactures products for a wide variety of domestic and import vehicles including Ford, Chevrolet, GMC, Dodge, Ram, Chrysler, Jeep, Toyota, Mercedes-Benz, Lexus, and Nissan. This includes transmissions from Aisin, Allison, GM, Jatco, and ZF, and axles from Dana, AAM, Torsen, and Sterling, plus many additional applications. Visit our product categories or use the vehicle search to find components designed for your vehicle.
Do your products increase fluid capacity?
Many PML differential covers and transmission pans are engineered with increased fluid capacity, depending on the application. Additional fluid can help improve cooling performance while providing better lubrication during demanding driving conditions.
Will an aluminum cover help reduce temperatures?
Aluminum naturally transfers heat more efficiently than many factory stamped steel or plastic components. Combined with increased surface area and cooling fins on many applications, PML products help promote improved heat dissipation under demanding operating conditions.
Are PML products difficult to install?
Most PML products are designed as bolt-on replacements using factory mounting locations. Installation requirements vary by application. PML covers and pans are larger than stock, so the dimensions of each PML product are listed on its web page, letting customers verify clearances and fitment before ordering.
What warranty comes with PML products?
PML stands behind the quality of every product we manufacture. Please refer to our Warranty page.
Where can I find installation instructions?
Installation instructions are included in the box with the pan or cover. The PML customer support team can also email a PDF copy of the instructions.
Do you offer customer support?
Absolutely. Our knowledgeable team is available to answer questions regarding product selection, fitment, installation, and general product information.
All related Emblems and vehicle body designs are trademarks of General Motors LLC, used under license to PML, Inc.
