BUAP Engine Rebuilder, Inc. is one of the Largest Manufacturers of Replacement Transmissions in the Nation.

If your current transmission feels like it’s gears are slipping, or not smoothly shifting, then it might be time to replace it. BUAP™ Transmissions come with a multi-year nationwide warranty. All transmissions are updated to current OEM specifications. We sell used, rebuilt, and remanufactured transmissions for domestic and international vehicles.


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At BUAP Engines and Transmissions, our ethos is grounded in excellence and reliability. We understand that a transmission is the heart of your vehicle’s powertrain, which is why we offer only the highest quality remanufactured transmissions. Our engineering process ensures that every transmission we sell is not just rebuilt, but completely updated. This attention to detail means we address common factory defects, improving upon the original design to eliminate the issues our customers might face with their current transmissions. Trust in BUAP to power your vehicle with a transmission that’s built to last, tailored for performance, and guaranteed for peace of mind.

Our commitment to ‘like new – only better’ is ingrained in every facet of our remanufacturing process. We don’t just replicate OEM standards—we elevate them. Our transmissions come with an upgraded torque converter, tested for optimal performance to prevent common issues like leaks or wear. Each valve body undergoes independent testing, ensuring they exceed wear resistance norms. We subject our transmissions to rigorous testing, replicating real-world driving conditions to guarantee reliability. Backed by an industry-leading warranty, our transmissions promise enduring quality, mile after mile.


 BUAP Engines & Transmissions takes immense pride in offering premium, remanufactured transmissions, crafted with precision within the United States. We utilize only the finest quality components, ensuring each transmission meets stringent standards for durability and performance. Our American-made promise is a testament to our dedication to superior craftsmanship and the longevity of our products. Trust in BUAP Transmissions for a seamless blend of American engineering excellence and unmatched quality.


A remanufactured and improved torque converter is included with every transmission.

• To eliminate the possibility of front seal leaks, vibration, and premature bushing wear, all torque converters are tested for leaks, lock-up, concentricity, and balance.

• Every fully remanufactured valve body, with complete system correction and recalibration kit, is tested independently.

• All wear-prone valves are restored to stringent specifications and vacuum tested to confirm proper function.

• Each remanufactured transmission is hot, cold, load, and simulated road tested using our proprietary CARS (Computer-Aided Road Simulation) dynamometer program.

• All remanufactured transmissions are backed by the industry’s best, no-hassle nationwide warranty.

• Fluid pump is fully detailed with resurfaced pump rotor mating surfaces and machined pump body mating surfaces to maintain correct fluid pressures.

• Late style stator support shaft with updated seal rings used exclusively in all units to eliminate seal leakage.
• Installed upgraded O.E. 38-element low sprag.

• Fully remanufactured torque converter is tested for leaks, lockup, concentricity, and balance. Upgrades exceed OE requirements and eliminate the possibility of front seal leaks, premature bushing wear, and vibration.

• Boost sleeves and oversized pr valve to restore pressure and prevent converter ballooning.

• Oversized AFL valve in valve body.

• Planetary covers removed and replaced for thorough cleaning.

• Tru-Flat qualification process applied to transmission case, valve body, pump, and channel plate prevent cross leaks and pressure losses.

• Every transmission is cold-and hot-tested using a proprietary dynamometer testing program that includes fully synthetic automatic transmission fluid and a filtration system.

• Testing and flushing of TEHCMS.

• New pressure switch films.


  1. Expertise: BUAP is known for its expertise in transmission repairs and rebuilds. Their technicians are highly skilled and trained to diagnose and fix transmission issues efficiently.

  2. Quality Parts: BUAP uses high-quality parts in their repairs and rebuilds, ensuring the longevity and reliability of your transmission.

  3. Experience: With years of experience in the industry, BUAP has built a reputation for providing top-notch transmission services.

  4. Warranty: Many of BUAP’S services come with a warranty, providing you with peace of mind knowing that your transmission is protected.

  5. Customer Service: BUAP prioritizes customer satisfaction, providing excellent customer service and support throughout the repair process.

  6. Convenience: BUAP offers convenient services such as online scheduling, drop-off options, and fast turnaround times, making it easy and hassle-free to get your transmission serviced.

  7. Value: While transmission repairs can be costly, BUAP aims to provide value for money with competitive pricing and reliable services.

Overall, choosing BUAP for your transmission needs can ensure that your vehicle’s transmission is in good hands, with reliable repairs and excellent customer service.