Merchant Automotive Automatic Transmission Filter

Merchant Automotive Automatic Transmission Filters: Built for the Allison 1000

When it comes to maintaining the Allison 1000 automatic transmission found in Duramax-powered GM trucks, few names carry as much authority as Merchant Automotive. Founded in 2004 by a former GM dealership professional, this Michigan-based specialist has grown into what its own website calls the largest Duramax parts supplier in the world — and their automatic transmission filters reflect that depth of expertise.

Unlike generic parts suppliers, Merchant Automotive designs and sources their transmission filter products specifically around the quirks of the Allison 1000 transmission platform used in 2001–2019 GM Duramax 6.6L trucks (covering engine variants including the LB7, LLY, LBZ, LMM, LML, and L5P). That platform-specific focus means fewer compatibility guesses and more confidence at the workbench.

Deep Pan and Shallow Pan Filter Kits: The Right Filter for Your Setup

One of the most important distinctions Merchant Automotive makes is the separation of their filter kits by pan type. The Allison 1000 transmission was installed with either a deep pan or a shallow pan depending on the truck's build, and using the wrong filter kit is a common and costly mistake. Merchant Automotive's lineup addresses both configurations directly.

• Deep Pan Filter Kit (Part #10716): Designed for trucks equipped with the deeper Allison transmission pan (approximately 4.5 inches deep front to rear), this kit includes both an internal sump filter and a genuine Allison external spin-on filter, allowing for a complete transmission service in a single purchase.
• Shallow Pan Filter Kits: Separate kits are offered for 2001–2010 and 2011–2019 shallow pan Allison 1000 transmissions, ensuring the correct internal filter geometry for each generation.
• Stand-Alone Deep Internal Filter: For owners who need to replace just the internal sump filter, Merchant Automotive also offers it individually — an updated design that delivers increased fluid capacity and lower fluid restriction compared to older configurations.

Complete Service Kits: More Than Just a Filter

Merchant Automotive also bundles their filter components into comprehensive service packages. Their Allison 1000 Deep Pan Kit pairs the deep sump internal filter and genuine Allison spin-on filter with a Merchant Automotive Filter Lock and Transynd transmission fluid, adding approximately three quarts of fluid capacity to the system for improved thermal management under load — an important consideration for towing and high-demand applications.

It is worth noting that Merchant Automotive's current deep pan internal filter is engineered for use with their MA Filter Lock (part #10690) and is not compatible with their older Filter Lock (part #10474). Checking which filter lock is installed before ordering ensures a proper, leak-free fit.

Why Duramax Owners Trust Merchant Automotive for Transmission Filtration

Merchant Automotive staffs professionals with deep knowledge of Duramax and Allison platforms, and many of their products are custom-designed and manufactured to maximize the performance and reliability of these specific trucks. Their transmission filter kits are not shelf-filler generics — they are developed with the real-world demands of diesel truck ownership in mind, from daily driving to heavy towing. For Duramax owners who want to service their Allison transmission the right way, Merchant Automotive's filter kits are a natural starting point.