Lougfeu Transmission Filter Kit for Allison 1000/2000 Series — 2001–2010 6.6L Duramax Chevy/GMC, Internal Shallow + Spin‑On Filter

Lougfeu's transmission filter kit replaces both the internal shallow filter and the spin‑on filter for Allison 1000/2000 Series transmissions used in 2001–2010 6.6L Duramax Chevy Silverado and GMC Sierra 2500HD trucks.

This kit contains two OE‑style filtration elements engineered for vehicles with shallow transmission pans: the internal shallow filter (29537965) and the external spin‑on filter (29539579). It’s a direct replacement designed to restore proper hydraulic flow, trap debris, and help prolong the life of transmission components without modification. The set also includes a thicker gasket for improved sealing during installation.

How will this kit improve my truck’s shifting performance?

Clogged or degraded filters restrict transmission fluid flow and cause inconsistent hydraulic pressure, which often shows up as rough shifts, slipping, or delayed engagement. Replacing both the shallow internal filter and the spin‑on element clears trapped particles and restores steady fluid delivery for smoother gear changes.

• Replaces factory internal shallow filter (29537965) and spin‑on filter (29539579).
• Restores consistent hydraulic pressure for smoother upshifts and downshifts.
• Reduces torque‑converter shudder and shift hesitation in stop‑and‑go driving.
• Helps protect solenoids, gears, and valve bodies from abrasive debris.

Will this fit my Allison 1000/2000 transmission and Duramax truck?

This kit is made specifically for light‑duty Allison 1000 and 2000 Series 5‑ and 6‑speed transmissions equipped with a factory shallow (standard) pan installed in 2001–2010 Chevrolet Silverado and GMC Sierra 2500HD trucks with the 6.6L Duramax diesel. It does not fit deep‑sump or deep‑pan transmission variants.

• Compatible: 2001–2010 Chevy Silverado / GMC Sierra 2500HD with 6.6L Duramax.
• Fits: Allison 1000 and 2000 Series, 5 & 6 speed, shallow pan models only.
• Not compatible: deep pan (deep sump) Allison transmissions.
• Confirm pan depth before ordering to ensure correct fitment.

What materials and filtration technology are used?

The internal shallow filter features a corrosion‑resistant steel frame and high‑density cellulose media engineered to capture fine particulates, while the external spin‑on element provides an additional filtration stage for larger debris and wear particles. Combined, they offer dual‑filtration coverage to manage contaminants commonly found in heavy‑duty diesel drivetrains.

• Internal filter: corrosion‑resistant steel frame + high‑density cellulose media.
• Spin‑on filter: external element for coarse particle removal.
• Dual filtration reduces abrasive particles reaching valve bodies and torque converters.
• Thicker included gasket improves sealing and prevents leaks after service.

How easy is installation and what’s included in the kit?

The kit is designed as a direct OEM replacement that requires no permanent modifications. Most mechanically inclined owners can perform the change as a DIY service with common hand tools, though professional installation is recommended if you’re unsure about transmission servicing.

• Included: internal shallow filter (29537965), spin‑on filter (29539579), and a 30% thicker gasket.
• Direct fit for specified shallow‑pan Allison transmissions; no adapters required.
• Simple swap procedure: drain fluid, remove pan, replace filters, reseal pan, refill fluid.
• Follow proper fluid type and torque specs per factory guidelines.

Who is this for: The Lougfeu Allison transmission filter kit is intended for owners and technicians of 2001–2010 Chevrolet Silverado and GMC Sierra 2500HD trucks with the 6.6L Duramax who have Allison 1000 or 2000 Series transmissions equipped with a shallow pan. It’s suited for drivers who want a straightforward OEM‑style replacement to restore fluid flow, reduce wear from contaminants, and maintain reliable shift quality—especially useful for trucks used in towing, hauling, and frequent stop‑and‑go conditions.