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Eaton/Fuller Transmission Control Module (TCM) 2008-2020: OEM 4306455

EATON/FULLER TRANSMISSION CONTROL MODULE (TCM) 2008-2020: OEM 4306455

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$1,595.00

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 NUMBER 4306455
PART TYPE Transmission Control Module (TCM)
BRAND Tamerx Diesel Products
ENGINE MAKE Eaton/Fuller
ENGINE TYPE
YEAR 2008-2020
PART NUMBER 4306455RM
APPLICATION NOTES ETC2008A02

PRODUCT DESCRIPTION

This is a Remanufactured Tamerx Transmission Control Module (TCM), Tamerx part number 4306455RM ( OEM Part Number 4306455 ). 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 Eaton/Fuller , production years 2008-2020, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

OEM NUMBERS

Primary OEM4306455
Additional OEM4306455, ETC2004A06

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.


Drive your transmission smarter and stronger with the Eaton/Fuller Transmission Control Module (TCM) (2008–2020), OEM 4306455. This remanufactured powerhouse—proudly re-engineered in the USA—comes upgraded for enhanced performance and built to meet rigorous OEM standards. It optimizes shift timing, clutch engagement, and drivetrain efficiency while delivering plug-and-play convenience. Backed by Tamerx’s rock-solid 1-million-mile or 1-year warranty, it's the dependable brain your rig needs to keep shifting smooth, hauling hard, and pushing forward without compromise.

FITMENT CHART

YEARMAKEENGINE(S)
2008Eaton/Fuller
2009Eaton/Fuller
2010Eaton/Fuller
2011Eaton/Fuller
2012Eaton/Fuller
2013Eaton/Fuller
2014Eaton/Fuller
2015Eaton/Fuller
2016Eaton/Fuller
2017Eaton/Fuller
2018Eaton/Fuller
2019Eaton/Fuller
2020Eaton/Fuller

PEOPLE ALSO ASKS | BLOG(S)

When every gear change matters, a healthy Transmission Control Module (TCM) ensures your Eaton/Fuller transmission remains responsive and reliable. Compatible with 2008–2020 models, the OEM 4306455 TCM orchestrates shifting schedules, clutch engagement, and system diagnostics, giving your truck smooth performance and consistent fuel economy. When you experience erratic shifts or receive transmission fault codes, the TCM may be the underrated culprit behind the problem.

Why the OEM 4306455 TCM Is Critical to Transmission Performance:

  • Shift Precision: Maintains accurate and adaptive shift schedules for smooth transitions and long-term gear health

  • Error Diagnostics & Recovery: Recognizes transmission faults, stores codes, and helps prevent costly mechanical failures

  • Gearbox Protection: Monitors clutch and shift solenoids to prevent gearbox damage from improper shifting

  • OEM Compatibility: Built to meet Eaton/Fuller system requirements, allowing easy plug-and-play replacement

  • Efficiency & Reliability: Helps maintain fuel efficiency and seamless drivability under load and during grunt work


If your truck is exhibiting sluggish shifting, hesitation, or unresolved transmission faults, replacing your TCM with the OEM 4306455 unit can be a game-changer. Offering OE-grade reliability and seamless integration with Eaton/Fuller systems, this TCM is the key to keeping your drivetrain performing flawlessly. For trusted transmission solutions, count on TamerX Diesel Parts to provide quality components that keep you running smooth and strong.

The Transmission Control Module (TCM) is the brain behind automatic gear shifting in modern vehicles. It monitors data from various sensors and sends commands to the transmission to ensure smooth, efficient operation. When the TCM begins to fail, you may still be able to drive—but it’s risky. Driving with a failing TCM can cause further damage, unpredictable behavior, and potential safety issues.

Signs and Risks of Driving with a Failing TCM

  • Erratic or Hard Shifting
    One of the earliest symptoms of a failing TCM is inconsistent gear shifting—either rough transitions, delayed shifts, or skipping gears entirely.

  • Stuck in a Single Gear (Limp Mode)
    The transmission may enter “limp mode,” locking into one gear (usually 2nd or 3rd) to prevent damage. While this allows for limited driving, it's not a permanent solution and should be addressed promptly.

  • Check Engine or Transmission Warning Light
    Fault codes related to shift timing, gear ratio errors, or communication issues between the TCM and ECM will trigger warning lights on your dashboard.

  • Poor Fuel Economy
    Incorrect gear selection can result in inefficient driving and increased fuel consumption over time.

  • Vehicle Hesitation or Stalling
    Inconsistent signal output from a faulty TCM may cause hesitation when accelerating, or even stalling at low speeds or stops.

  • Increased Wear on Transmission Components
    Improper gear shifts over time place additional stress on the transmission, possibly shortening its lifespan or leading to costly repairs.

While it may be technically possible to drive short distances with a failing Transmission Control Module, doing so is not recommended. The longer the issue is ignored, the more strain is placed on the transmission system, which could escalate into far more expensive problems. If you notice any symptoms listed above, have your TCM diagnosed by a qualified technician and schedule repairs as soon as possible. Prompt attention ensures safer driving and protects your vehicle’s drivetrain investment.

Use a dry, soft brush or electronic cleaner to gently clear any dust or debris, avoiding moisture.

Common signs include erratic shifting, no-shift conditions, or related diagnostic trouble codes.

A faulty TCM can cause improper shifts, transmission damage, or drivetrain safety issues.

Transmission response can deteriorate within seconds of encountering a control issue.

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