Allison Spin-On External Transmission Filter for 1000/2000 Series — 29539579 with Magnet 29535617, OEM Fit & Particle Capture

Allison External Spin-On Filter 29539579 paired with Transmission Magnet 29535617 is a genuine replacement oil filter assembly for Allison 1000/2000 transmissions that traps wear particles and helps maintain fluid cleanliness.

This OEM Allison spin-on external filter and matching magnet are engineered to match factory specifications for fit and filtration performance. Allison advises installing a new spin-on filter after the first 5,000 miles of operation, then following routine service intervals. The magnet is supplied with the filter because it captures metallic contaminants that the media alone can miss, providing an extra safeguard for valve bodies and pump components.

Why choose this Allison spin-on external filter for my transmission?

This is a factory-authorized replacement built to Allison tolerances, so it installs easily and performs as the original part intended. Using the genuine part reduces the risk of fitment issues and helps ensure consistent fluid flow and filtration efficiency.

• Direct OEM fit for Allison 1000/2000 series transmissions.
• Includes factory-matched magnet to trap metallic particles.
• Manufactured to original filtration and bypass specifications.

How does the included magnet improve protection?

The transmission magnet collects ferrous particles that can circulate despite the filter media, lowering the chance those fragments damage internal components. Replacing the magnet with each filter swap ensures the magnetic surface is not saturated and continues to attract debris effectively.

• Captures small metallic shavings that bypass filter media.
• Simple replacement that mounts with the standard spin-on assembly.
• Recommended to change simultaneously with the filter for best results.

When should I replace this spin-on filter and magnet?

Allison recommends the first replacement after approximately 5,000 miles of service for break-in and initial particle capture, then at regular intervals per your vehicle or equipment maintenance schedule. Follow your operator manual for exact service intervals based on duty cycle and operating conditions.

• First replacement around 5,000 miles as advised by Allison.
• Subsequent changes according to the transmission service schedule.
• More frequent changes recommended in severe or heavy-duty use.

Is installation straightforward for this external spin-on filter?

Yes — the unit is a standard spin-on design intended for direct replacement of the factory filter. Hand-tighten to the specified torque, ensure the magnet seats correctly, and follow fluid level checks after installation to confirm no leaks and correct fluid volume.

• Spin-on style for fast replacement and minimal tools.
• OEM thread and gasket dimensions for reliable sealing.
• Includes magnet so no separate parts purchase is needed.

Who is this for: technicians, fleet managers, and vehicle owners who operate Allison 1000/2000 transmissions and want an exact-match OEM spin-on filter with magnet. This product is ideal for those who prioritize factory-specified parts for maintenance, need a straightforward service procedure, and want the additional protection a magnet provides against metallic contamination.