Merchant 10078 Allison 1000 Internal Filter with Spin on Combo | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7

Features: - Fits 2001–2004 GM 6.6L Duramax LB7 models - Designed for Allison 1000 shallow transmission pans - Includes internal transmission filter and spin-on filter - Genuine Allison external spin-on filter included - Ideal for complete transmission servicing - Helps extend transmission life and performance - Ensures proper filtration during fluid changes - Perfect for routine maintenance or overhaul - Easy replacement for worn or clogged filters - OEM-quality parts for reliable performance - Prevents harmful debris from damaging internals - Made by trusted experts at Merchant Automotive Give Your Transmission The Maintenance It Deserves If you’re serious about keeping your Allison 1000 transmission running strong, this combo kit from Merchant Automotive is a must-have. It includes both the internal filter and the genuine Allison spin-on external filter, so you’re not cutting corners when it comes to proper service. Whether you're prepping for a long tow, hitting the road with a heavy payload, or just keeping up with smart maintenance, this kit helps keep your transmission cool, clean, and protected. It’s specifically built for 2001–2004 GM Silverado and Sierra HD trucks with the 6.6L Duramax LB7 and shallow transmission pan, so there’s no second guessing on fitment. You get everything you need in one box, which means fewer trips to the parts store and more time getting the job done. This is one of those upgrades that might not be flashy, but it’s the kind that pays off in long-term reliability. Take care of your transmission now, and it’ll take care of you down the line. Designed To Match OEM Specs And Deliver Long Term Protection The Merchant 10078 Internal Filter and Spin-On Combo is engineered specifically for the Allison 1000 transmission found in 2001–2004 GM 2500HD and 3500HD models equipped with the 6.6L Duramax LB7. This kit is tailored for shallow transmission pans and includes both the internal filter and a genuine Allison-branded external spin-on filter, ensuring that every critical filtration point is addressed during servicing. The internal filter is responsible for capturing debris and contaminants within the transmission housing, while the external spin-on filter helps maintain clean fluid circulation throughout the cooling and return systems. By replacing both filters together, this combo helps maintain proper fluid flow, reduce operating temperatures, and extend the lifespan of the transmission under heavy-duty use. Each component is built to meet or exceed factory specifications, providing peace of mind for daily driving, towing, or commercial work. This kit is ideal for complete transmission services where neglecting either filter could compromise overall performance. It is recommended for any maintenance interval where transmission fluid is being changed or flushed. Fits: 2001, 2002, 2003, 2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7 Notes: - Designed for 2001–2004 GM 2500HD and 3500HD with 6.6L Duramax LB7 - Fits vehicles equipped with shallow transmission pans only - Includes both internal transmission filter and external spin-on filter - External filter is a genuine Allison replacement part - Ideal for complete transmission service or fluid change - Helps maintain proper fluid flow and filtration efficiency - Not compatible with deep pan applications, order specific kit if needed - Replacing both filters is recommended during regular service intervals - Prevents premature wear by removing harmful debris from transmission fluid - Professional installation is recommended for optimal performance