29539579 TRANSMISSION FILTER FOR ALLISON 1000/2000/2400 SILVERADO/SIERRA HD

iFJF part No.: FJ-9579. 29539579 Spin-On Transmission Fluid Filter Allison 1000/2000/2400 Series The iFJF 29539579 Spin-On Automatic Transmission Fluid Filter is a direct replacement for Allison 1000, 2000, and 2400 series automatic transmissions found in GM Duramax diesel trucks and medium-duty commercial vehicles . This filter replaces the old-style Allison part number 29537268 and provides high-efficiency filtration to protect your transmission's valve body, clutch packs, and torque converter from wear particles and debris. Allison transmissions are known for their durability regularly reaching 300,000+ miles in commercial service but they require clean ATF to achieve that lifespan. Contaminated fluid causes sticking valves, delayed shifts, and accelerated clutch wear. This spin-on filter captures particles as small as 25 microns while maintaining full transmission fluid flow under all operating conditions from cold morning starts to heavy towing at highway speeds. Key Features Direct Allison Replacement: Replaces Allison 29539579 and old-style 29537268 spin-on transmission filters exact dimensional match, guaranteed fit High-Efficiency Filtration: Multi-layer media captures wear particles, clutch material, and debris down to 25 microns protecting precision valve body components Heavy-Duty Construction: Thick-gauge steel canister with corrosion-resistant coating withstands under-vehicle exposure to road salt, water, and debris Spin-On Design: Quick external filter change no dropping the transmission pan required Silicone Anti-Drainback Valve: Maintains fluid in the filter between starts for immediate transmission protection on cold starts Transmission Compatibility Transmission Series Fluid Type Allison 1000 5-speed / 6-speed automatic TES-295 / TES-668 ATF Allison 2000 5-speed / 6-speed automatic TES-295 / TES-668 ATF Allison 2400 6-speed automatic TES-295 / TES-668 ATF Common Vehicle Applications Year Make Model Engine 2001-2019 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax V8 2001-2019 GMC Sierra 2500HD / 3500HD 6.6L Duramax V8 Various Multiple Medium-duty trucks, buses, specialty vehicles Allison-equipped platforms Technical Specifications Specification Value Filter Type Spin-On External Transmission Filter Replaces Allison 29539579, 29537268 (old style) Filtration Rating 25 micron absolute Thread Size Allison OEM-spec Service Interval Every transmission fluid change (25,000-50,000 miles depending on duty cycle) SKU FJ-9579 Why Replace Your Allison Transmission Filter? The Allison 1000/2000/2400 uses an external spin-on filter as its primary filtration stage (the internal pan filter is secondary). Over time, this external filter loads with clutch friction material, metal wear particles from gears and bearings, and oxidized fluid debris. A clogged filter restricts ATF flow causing delayed engagement, slipping shifts, overheating, and eventual transmission failure . Replacing the spin-on filter at every fluid change is the simplest and most effective thing you can do for Allison transmission longevity. FAQ Q: Is this the spin-on external filter or the internal pan filter? A: This is the external spin-on filter the one accessible without dropping the transmission pan. Allison 1000/2000/2400 transmissions use two filters: (1) An external spin-on filter (this part) that captures larger particles and is changed every fluid service, and (2) An internal pan filter that requires dropping the pan for replacement during major services. R