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ALLISON TRANSMISSION CONTROL MODULE (TCM) 2005-2008: OEM 25798264

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$3,995.00

CORE CHARGE:

$500.00
iCORE DISCLAIMER: The CORE charge is a 30 day hold and will not be processed as long as the CORE is returned within 30 days. If you do not have a CORE or fail to return the CORE within 30 days, the CORE charge hold amount will be processed at that time.

AVAILABILITY IN STOCK
OEM NUMBER25798264
PART TYPETransmission Control Module (TCM)
BRANDTamerx Diesel Products
ENGINE MAKEAllison
ENGINE TYPE
YEAR2005-2008
PART NUMBER25798264-A40RM

PRODUCT DESCRIPTION

This is a Remanufactured Tamerx Transmission Control Module (TCM), Tamerx part number 25798264-A40RM ( OEM Part Number 25798264 ). All parts are proudly remanufactured in the U.S.A. to the highest of OEM standards, and improvements are often applied to the original design in the remanufacturing process. This part is primarily made for a Allison , production years 2005-2008, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

OEM NUMBERS

Primary OEM25798264
Additional OEM25798264, A40

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode
WEIGHT2.00 LBS

SHIPPING OPTIONS

Ship Weight : 2.00 LBS
UPS Ground, 2nd Day Air, Next Day Air

SHIPPING POLICY

Tamerx Diesel Products ships via UPS Ground. Next day air shipping can be arranged for a reasonable price of anywhere from $50.00 - $100.00 depending on the weight of the product and your location. We will do everything we can to make sure that you get the service you need. We understand how important it is to receive your order as quickly as possible.
In most cases Tamerx Diesel Products only needs one address, as long as your product is shipping to the same location as your billing information. In order to eliminate credit card fraud, your billing information must match the credit card you provide.

The terms, conditions, and details of our warranty vary from product to product. Specific warranty details can be found below.

Tamerx Diesel Products provides a replacement warranty on all of our parts. The duration and mileage limitations of the warranty vary by product and are specified on the product's detail page/item listing.

Please note that the warranty covers replacement of the part and the cost of shipping the replacement part to you only. It does not cover any shop, labor, towing, or any similar or related costs. This is not a "money back guarantee".

If you experience a problem with your part or it is not functioning properly, the correct warranty procedure is to call us at (510) 257-1777 (8:00 AM - 5:00 PM ET Monday through Friday). Be sure to have your order number and/or other relevant order information ready so we can easily locate your order and resolve your issue as quickly as possible. From that point, we will review with you any troubleshooting steps that may need to be taken and other areas or systems that can be checked to rule out external problems contributing to your part's issue. If a replacement is determined to be necessary, we will then arrange for your replacement part to ship out ASAP and issue any necessary return shipping labels and/or documents.

As is the case for the majority of the diesel products sold on Tamerx Diesel Products, your part's warranty is active as soon as you install it. In some other cases, warranty activation is contingent upon you sending us your core (i.e., your old part). Tamerx Diesel Products will provide you a return shipping label for parts that have a warranty with a core return condition. When we have received your core return, the part's warranty coverage begins. We reserve the right to void the product warranty if your core is not received within the allotted time, or if it isn't received at all. If the warranty for the diesel part you are purchasing has a core return requirement, it will be clearly noted on the product detail page/item listing.

What is a Core Charge?

A core charge (also called "core deposit") is similar to the deposit you might pay for a can or bottle of soda and is a standard requirement in the auto parts industry. For example, in many states, to promote recycling, you pay a deposit when you purchase a can of soda and receive your deposit back when you return the empty can. Many automotive parts have a core charge, or core price, that works in essentially the same way as a soda can deposit.

30 Day Core Charge Hold

You authorize Tamerx Diesel Products, to hold your credit card for the specified core charge amount and that you agree to return your core with 30 days of receiving the purchased part. When we have received your core return, the hold is released and the core charge payment is canceled.

The customer, or parts buyer, is responsible for any shipping costs associated with core returns unless otherwise specified in the product listing/detail page. Tamerx Diesel Products offers prepaid UPS shipping labels (SKU numbers UPS-CR1 and UPS-CR2) for use in returning your core that are available for purchase on our website during your shopping/order process.

The shipping label you will need to use for the core return is dependent upon what part you are purchasing. UPS-CR1 is good for cores weighing up to 20 pounds. UPS-CR2 is appropriate for shipping cores weighing 21 pounds or more. You must include enough information with the core return that clearly identifies it as a.) a Core Return, and b.) contains enough information we can use to clearly associate the core return with your order. Including a copy of the invoice or packing slip that came with the original shipment, clearly marked "Core Return", is ideal. Alternately, you can include a note marked as "Core Return" that includes your order number, full name and address, and phone number or other contact information. Failure to include this information with your returned core will most likely delay any due core credit being issued and/or delay any applicable warranty activation. Core returns need to be for the exact part purchased and cannot be damaged. Substituting another part in place of the part you have purchased is not acceptable.

All fluids must be drained.

If you have purchased a set or a parts package, you will need to return cores for all components of the set. For example, if you have purchaed a high pressure oil pump with an IPR valve, you will need to return both HPOP and IPR valve cores to receive proper credit. If you have purchased an EGR cooler/EGR valve package, your core return must consist of an EGR cooler core and an EGR valve core, or core credit will not be given.

Core Charges are often mandated by state legislature, and, as such, the actual core charge and taxes on the charge may vary depending on the state in which you buy your part. The Tamerx Diesel Products core charge presented to you online today with your item is representative of the most common core charge.


For 2005-2008 Allison transmissions, the OEM 25798264 Transmission Control Module (TCM) provides precise gear control and seamless integration with the transmission system. Engineered to meet OEM specifications, it ensures reliable functionality and consistency. Constructed with high-quality materials, this TCM is designed for durability and long-term reliability in demanding environments. Its direct-fit design allows for easy installation, minimizing downtime and ensuring a secure connection. Ideal for commercial and heavy-duty vehicles, this component helps maintain smooth and efficient transmission operation.

PEOPLE ALSO ASKS | BLOG(S)

The Allison Transmission Control Module (TCM) 2005-2008: OEM 25798264 is essential for ensuring smooth and efficient transmission operations. This blog delves into the benefits of the Allison TCM and how it enhances vehicle performance.

Key Features and Benefits

  • Optimized Transmission Shift
    •  Ensures precise and timely gear changes for a smoother driving experience.
  • Enhanced Fuel Efficiency
    • Optimizes transmission performance, leading to better fuel economy.
  • Durable Design
    • Built to withstand rigorous driving conditions, ensuring long-lasting reliability.
  • Easy Installation
    • Specifically designed for 2005-2008 models, ensuring a perfect fit and straightforward installation.

Maintenance Tips

  • Regular Software Updates
    • Keep the TCM software updated to benefit from the latest improvements.
  • Professional Inspections
    • Have the TCM checked by professionals to ensure optimal performance.
  • Monitor Vehicle Performance
    • Pay attention to transmission performance to catch any issues early.

The Allison Transmission Control Module (TCM) 2005-2008: OEM 25798264 is a critical component for maximizing your vehicle's transmission performance. With features like optimized transmission shifts, enhanced fuel efficiency, and durable design, this TCM ensures your vehicle operates smoothly and efficiently. Regular maintenance and updates will ensure it continues to deliver reliable performance, keeping your vehicle in top condition. Invest in the OEM 25798264 TCM to enhance your driving experience and vehicle longevity.

The transmission control module (TCM) is an essential component in modern vehicles, responsible for managing and optimizing gear shifts. When the TCM fails, it can lead to a host of transmission issues, affecting your vehicle's performance and drivability. Understanding the common causes of TCM failure can help you take preventive measures and maintain your vehicle's health. In this blog, we’ll explore the main factors that can lead to a transmission control module failure.

Common Causes of Transmission Control Module Failure

  • Electrical Issues
    • Faulty wiring, shorts, or poor electrical connections can disrupt the TCM's operations. Electrical problems are one of the leading causes of TCM failure, leading to inconsistent or no communication with the transmission.
  • Exposure to Heat and Moisture
    •  TCMs are sensitive to extreme temperatures and moisture. Overheating or exposure to water can damage the module’s internal circuitry, leading to failure.
  • Software Corruption
    •  The TCM relies on software to manage transmission functions. Corrupted software, often due to unsuccessful updates or malware, can cause the TCM to malfunction.
  • Physical Damage
    • Physical impacts or accidents that affect the transmission area can damage the TCM. Even minor accidents can lead to significant TCM issues if the module is compromised.
  • Wear and Tear
    • Over time, the TCM components can wear out due to continuous use, leading to failures. This is particularly common in older vehicles or those with high mileage.
  • Voltage Irregularities
    • Fluctuations in voltage, often caused by a failing alternator or battery, can harm the TCM. Consistent voltage levels are crucial for the TCM to function correctly.
  • Contaminated Transmission Fluid
    • Dirty or contaminated transmission fluid can cause internal components of the TCM to corrode or clog, leading to failure. Regular transmission fluid changes can help prevent this issue.
  • Manufacturing Defects
    •  Occasionally, TCMs may fail due to inherent manufacturing defects or design flaws. These defects can lead to premature failure and require replacement.

Understanding what causes a transmission control module to fail is crucial for preventive maintenance and timely repairs. By being aware of these common causes, you can take steps to protect your TCM and ensure your vehicle’s transmission operates smoothly. Regular maintenance, proper handling, and addressing issues promptly can help extend the life of your TCM. For more information on transmission care and to find high-quality replacement parts, visit our website. Keeping your transmission control module in good condition is key to maintaining your vehicle’s performance and reliability.

Use an OBD-II or Allison DOC diagnostic scanner to check for fault codes, inspect wiring harnesses for damage, and verify shift signal response.

Yes, a damaged or non-responsive TCM may cause the transmission to stay in neutral, preventing gear selection.

Possible causes include corroded connectors, internal TCM circuit failure, shorted wiring, or incorrect software calibration.

Yes, performing an adaptive reset helps the transmission relearn optimal shift patterns based on driving conditions.

Allison Transmission Control Module (TCM)s