SKU #: MA-10760-Main Merchant Automotive MAximum Pro Series Allison 1000 Transmission 07.5-10 6.6L GM Duramax LMM

Purchase Merchant Automotive MAximum Pro Series Allison 1000 Transmission 07.5-10 6.6L GM Duramax LMM
    • 2007.5-2010 6.6L GM Duramax LMM
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    Choose One: Core Charge: ?

    Terms & Conditions

    We at Diesel Power Products offer a deferred core program in which we allow you to defer the typical upfront core charge when purchasing via credit card payment. All cores, whether the core charge was deferred or not, must be returned within 21 days from delivery date of product requiring core charge. Failure to do so can result in forfeiture of the entire core charge return. In the event you originally deferred the core charge, you authorize Diesel Power Products to charge you for the core charge.

    All cores must be returned to the original warehouse that original shipment was sent from. If a return label is provided in the original shipment, use this tag. If one is not included, contact us immediately, and we can provide you with the correct address of where the core(s) must be returned to, as well as an RMA (Return Merchandise Authorization) number. DO NOT rely on the return address on the original label as a source for where to ship to.

    If cores are shipped to the incorrect warehouse, your core money will be returned less the shipping cost for us to send the core(s) to the correct warehouse, or if you deferred the core you may be charged for the shipping amount.

    Cores that have been disassembled and/or have missing and/or damaged major components will not receive full core credit. Returned cores must be on a "like-for-like" basis, meaning that the returned core has the exact same fitment as the remanufactured component that was purchased. In the event that the core is not "like-for-like," your core may not be eligible for return / credit.

    Diesel Power Products has the right to alter this policy (i.e. extend the terms) for any reason. If you have an outstanding circumstance, contact us.

    What is a "Core Charge"?

    In order to understand what a core charge is, you must first understand what a core is. In the automotive industry, most products are manufactured from brand new materials. However, numerous products are also remanufactured, meaning that the manufacturer of the product takes a used product, typically removed from a vehicle, disassembles, and replaces all worn components of the master product. A great example of this is in regards to automatic transmissions in which the manufacturer takes an existing transmission, replaces all of the inner working components, such as the torque converter, valve body, etc. and merely reuses the case.

    Because aftermarket manufacturers require a steady stream of incoming cores to build, they charge a deposit on the core, known as a core charge, that is refunded upon receipt. In some cases, the core is not reusable, such as in the event of a cracked case, at which point the core deposit would not be credited as the core component is not reusable.

    If you plan on returning your core you have two options.

    OPTION 1:
    You can accept it, which means you will be charged for the part AND the core at time of purchase. You still have the option to send it back, and if you do, the core will be refunded back on the card used, presuming the core meets core criteria and the core is returned within 21 business days from originally receiving your order. If you have outstanding circumstances that would not allow the return to occur within 21 days, please contact us.

    OPTION 2 You can defer the core charge. If you defer it, you will not be charged a core at time of purchase. You will have 21 business days from the day you receive it to send it back. As long as the core is received within the 21 business days, you will not be charged. If 21 business days goes by and you do not send it back, the card on file will be charged the core amount. You still may send it back, and once received, we will issue the core amount as in store credit, pending any limitations as set forth by the manufacturer.Core deferral is limited to payment by credit card only.

    What is "Core Return Shipping Cost"?

    This product is remanufactured and requires that your original part being removed (core) to be returned. The return shipping charge of your core is not included in the purchase price of the item, but we offer you a flat rate charge that includes a core return shipping label as a convenience. If you would like a core return label included with your purchase, please select this option.
  • This item requires freight shipping. Learn More
    This item requires freight shipping. Learn More


Its true, the Allison 1000 transmission originally set the bar pretty high upon its initial unveiling on the first Duramax equipped Chevy's back in 2001. Many looked to this transmission as being the ... read more

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Its true, the Allison 1000 transmission originally set the bar pretty high upon its initial unveiling on the first Duramax equipped Chevy's back in 2001. Many looked to this transmission as being the for any future transmission issues. And to some degree, the Allison's have proven themselves, but as with all things, time, hard work, and horsepower will cause them to fatigue and fail. Fortunately, the professionals at Merchant Automotive know the ins and outs of properly building an Allison to deliver the reliability you need from your truck.

Merchant Automotive has a long history of building transmissions for customers from all over the country who depend on their truck for many types of applications. The components in the Maximum Transmissions were selected specifically based on our experience working exclusively on the GM Duramax trucks with an Allison transmission.

Designed to optimize the potential of the Allison transmission even with additional power, the professionals at Merchant Automotive take the proven reliability of their Work Series and increase capacity even more with additional clutch apply area, heavy duty friction material, and additional hydraulic pressure to ensure Maximum holding capacity. For use with engines modified above stock, or aftermarket components (proper tuning and gearing required).

  • Transmission will be shipped with 24 Quarts (6 Gallons) of CAM2, Dexron VI, Full Synthetic, Automatic Transmission Fluid
  • Lower Foaming
  • Excellent Oxidation Stability
  • Better Protection against Pitting
  • Highly Shear Stable
  • Fully Synthetic Formulation
  • Two Year, Unlimited Mileage Warranty

CORE RETURN INFORMATION: You will be required to return your original transmission back to Merchant Automotive in order to receive your core deposit back. Your transmission must match the product purchased (model and year) and be assembled. A complete good transmission will get you a full core refund. However, it is understood that you may have some missing parts and/or damage and we would like to get you as much of a refund as we can for the good usable parts.

Below are examples of items that may reduce the maximum credit:
  • Damaged or missing bell housing $300
  • Damaged or missing rear housing $300
  • Damaged or missing planetary $600
  • Unassembled core $200
  • Missing convertor $200


  • SkuMA-10760
  • ManufacturerMerchant Automotive
  • MPN10760-4WD | 10760-2WD
  • C1-C5 frictions with improved material and increased apply area
  • C1-C5 Steels
  • LML pistons and springs decreases deflection of C3 apply plate
  • Hydraulic improvements to increase and maintain line pressure which increase clutch pack clamping force and improves convertor holding power.
  • Smoother apply into drive from park or reverse
  • Increased C2 clutch apply pressure improves 5th gear holding capacity
  • Complete gasket and seal kit
  • All new genuine Allison Torrington bearings
  • Select bushings common for wear
  • Deep pan (increases capacity)
  • Allison spin on filter
  • New style deep pan filter with increased filtration capacity and lower flow resctriction
  • Filter lock to ensure filter maintains seal preventing leaks and pressure loss
  • Genuine Allison Pressure Switch, latest design for maximum durability
  • Wire harness connector body and seal to repair common issues and prevent leaks
  • Transfer MORE POWER to the ground with improved torque efficiency
  • Fully furnace brazed pump and turbine assemble\Steel drive splines
  • Heavy Duty Torrington enclosed needle bearings
  • Electronically balanced
  • Lower operating transmission temperatures
  • Increase fuel mileage 1 to 3 mpg in most cases
  • Billet steel front cover
  • MAximum Valve Bodies are disassembled and ultrasonic cleaned to remove all debris.
  • Upgraded to support increased line pressure.
  • Improvements for smoother apply into Drive from Park or Reverse.
  • New Genuine Allison Pressure Switch.
  • New Genuine Allison Wire Harness.
  • Dyno tested to ensure quality control standards


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What is "Freight Shipping Cost"?

Due to the size and/or weight of this product, it must be shipped via truck freight, as opposed to standard small package couriers (FedEx, UPS, USPS). Because of this, our free and expedited shipping methods are not available for this item and a required truck freight charge will be applied at checkout.

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Merchant Automotive MAximum Pro Series Allison 1000 Transmission 07.5-10 6.6L GM Duramax LMM

Merchant Automotive MAximum Pro Series Allison 1000 Transmission 07.5-10 6.6L GM Duramax LMM

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