High-Efficiency Transmission Hydraulic Filter Pair – Models 29510910 & 29545780

Two cartridge elements from the same heavy-duty transmission hydraulic family, originally specified for Allison 1000/2000/3000/4000-series automatic transmissions used on city buses, refuse trucks, heavy-duty tippers, concrete pumpers, and oilfield service vehicles. 29510910 is the fine full-flow element (microglass, β₁₂ ≥ 1000) protecting the main transmission hydraulic circuit, while 29545780 is the companion cartridge for 3000/4000-series units, handling the auxiliary or strainer-grade duty in the same loop. Both are wire-mesh-supported cartridges built for high-burst, high-cycle transmission service.

Key Features

• 29510910: Microglass media supported both sides, Beta 12 ≥ 1000 (ISO 16889 / DFE tested), 5 µm nominal, no bypass — full-flow design ensures all fluid passes through media

  
  

• 29545780: Efficient media pack, auxiliary/strainer-grade in the 3000/4000 transmission circuit, shorter & wider profile than 29510910

  
  

• Epoxy adhesive, corrosion-resistant CS/AL end caps, Viton O-ring standard

  
  

• Out→In flow (29510910); housing-defined flow for 29545780 per head

  
  

• Max pressure 150 psid (≈10 bar) on 29510910; burst-rated per ISO 2941

  
  

Technical Specifications

Application Guidance

29510910 – Primary full-flow hydraulic filter in the transmission valve-body loop on 1000, 2000, 3000, and 4000-series automatic transmissions. Covers city-bus drivetrains, refuse-packers, concrete pumpers, tow trucks, and oilfield service vehicles (well-service rigs, frac-support units) where transmission shift quality depends on clean ATF. The β₁₂ ≥ 1000 rating strips wear particles down to 12 µm with >99.9 % efficiency — critical for clutch-pack longevity under high-cycle urban duty.

29545780 – Companion cartridge for 3000/4000-series transmissions (heavier torque-class units on mining haul trucks, oilfield carriers, large coaches). Slightly shorter & wider (80 mm OD × 180 mm) than 29510910, positioned as the auxiliary/strainer stage in the same transmission hydraulic envelope. Works alongside 29510910 in multi-filter transmission housings, or standalone on simplified heads.

📎 Common cross-references: 29510910 ↔ Pall HC9600FKS13Z / HC9600FUS13Z, Baldwin H9082, Donaldson P566217, Fleetguard HF30295. 29545780 shares the 3000/4000 service envelope with 29548988, 29540494, and other Allison 295xxxxx siblings.

Fluid Compatibility

Per media/O-ring choice, qualified with:

• ATF (Dexron III/VI, TES-295, TES-389)

  
  

• Mineral hydraulic oil (ISO HM/HV)

  
  

• Water-glycol (HFC) – Viton recommended

  
  

• Synthetic lubricants & turbine/compressor lube oils

  
  

• Diesel & machining fluids (29510910 microglass trim)

  
  

Installation & Service

1. Depressurize transmission, remove transmission pan, note filter orientation before pulling old element.

   
   

2. 29510910: Seat into the valve-body header — no bypass, so proper O-ring seal is critical; a leaky seat bypasses the entire media pack.

   
   

3. 29545780: Install per housing marks; confirm flow direction if housing is directional.

   
   

4. Refit pan with new gasket, refill transmission to correct level, run through all ranges, recheck level hot.

   
   

5. Replace per OEM transmission service interval (typically 50,000–80,000 km / 2,000–3,000 h, or with each pan-drop service). For oilfield/refuse severe-cycle, shorten to 30,000 km.

   
   

Quality Assurance

• ISO 16889 – multi-pass β-ratio & DFE (29510910)

  
  

• ISO 2941 – collapse/burst

  
  

• ISO 2942 – fabrication integrity

  
  

• ISO 2943 – media/fluid compatibility

  
  

• ISO 3968 – pressure drop vs. flow

  
  

Ordering

Quote 29510910 (79×43×329 mm, β₁₂≥1000, 5 µm, 1000–4000 transmission fine full-flow) or 29545780 (80×180 mm nom., 3000/4000 aux/strainer) with seal material and quantity. Cross to Pall HC9600FK, Baldwin H9082, Donaldson P566217, Fleetguard HF30295 available on request — provide transmission model and existing OEM number for confirmation.

All values nominal; 29545780 dimensions approximate from housing pattern — confirm OD/length and head type against your actual transmission filter header before installation.