SunCoast 37710-12L Deep Filter with Lock & Spin-On Transmission Filter | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Features:

• Designed for 2001–2016 Duramax Allison transmissions
• Includes deep internal filter and spin-on filter
• Lock feature prevents filter backing out
• Improved filtration for better transmission protection
• Ideal for towing, performance, and heavy use
• Helps extend transmission fluid life
• Reduces risk of filter loosening under load
• High-quality materials resist heat and pressure
• Built from years of OEM failure analysis
• Precision-fit for easy installation
• Supports high-demand transmission performance
• Made by diesel transmission specialists

Keep Your Allison Running Strong Under Pressure

When you're towing heavy or pushing your Duramax hard, your transmission has to work just as hard to keep up. That’s where the SunCoast 37710-12L Deep Filter with Lock and Spin-On Filter steps in to make sure your Allison transmission stays protected and running smooth. Built with reliability in mind, this filter setup delivers superior filtration that helps extend fluid life and maintain cleaner internals, even under high stress. The deep filter design increases surface area for better flow, while the locking mechanism keeps the filter from backing off during rough terrain or heavy throttle. It’s the kind of upgrade that gives you confidence whether you're hauling a trailer through the mountains or racing against time on a job site. SunCoast has earned its reputation by solving the problems others overlook, and this filter setup is a direct result of that expertise. For diesel owners who demand more from their transmission, this is the simple upgrade that makes a big impact.

Designed With Real World Demands In Mind

The SunCoast 37710-12L Deep Filter and Spin-On Transmission Filter kit is engineered for use in 2001–2016 GM 2500HD and 3500HD trucks equipped with the Allison transmission. This system includes both a deep internal filter and an external spin-on filter, offering increased filtration capacity and a more reliable fluid flow path. What sets it apart is the built-in locking feature, which prevents the spin-on filter from vibrating loose, a known issue in demanding applications like heavy towing or performance use. Each component is manufactured using high-grade materials that withstand transmission heat, fluid pressure, and long-term wear. SunCoast developed this solution through extensive analysis of common OEM failures and addressed them with practical, performance-focused design improvements. The result is a transmission filter system that not only fits with precision but functions with lasting durability. It’s a dependable choice for diesel truck owners looking to reinforce their Allison’s reliability under load.

Fits: 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Notes:

• Designed specifically for 2001–2016 6.6L Duramax with Allison transmission
• Includes both deep internal filter and spin-on filter
• Locking feature helps prevent filter loosening under load
• Ideal for towing, performance, and high-stress driving
• Developed from OEM failure analysis by SunCoast engineers
• Improves filtration to support longer fluid life
• Provides added reliability for modified or working trucks
• Easy to install with precision-fit design
• Built by specialists in diesel transmission performance
• May offer better longevity than stock filter setups