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FITMENT: 2001-2019 Chevy/GMC Allison 1000 Equipped TrucksKIT INCLUDES: Adapter, O-ring, 077-3492 filter, and Instructions MADE IN THE USA! The Ultimate Oil Filtration for your Allison 1000 Transmission is here! Afterfield testing and 3rd party lab testing, we are proud to bring the MDDP CATAllison Adapter to the market! At MDDP we like to create products that areheavy duty, overbuilt, precise, and able to handle the toughestenvironments. This was why we wanted to get the CAT 077-3492Hydraulic/transmission Oil Filter on the Allison! How this Kit Can Help Your Transmission?Keeping clean fluid through your clutch, torque converter, and valve body isthe lifeblood of your transmission. Keeping the grit and abrasive material inthe filter and out of the transmission fluid. The CAT filter we chose andtested for this kit is designed for the harshest environments and to filterlarge amounts of oil at a high rate of flow between long service intervals inthe field. The CAT 077-3492 is designed for far more flow and pressure thanan Allison Transmission is able to produce. Allowing it to easily outperformthe OEM and competition. TESTED IS AN UNDERSTATEMENT.Filtration TestingWe wanted to know how the CAT filter would catch transmission fluidcontamination versus the OEM Allision Filter. The 3 rd party lab testintroduced 30 micron (average transmission debris size) particulates at 1.3GPM, upstream from the filter. The fluid downstream from the filter wasanalyzed to see how much particulate above 30 microns made it past thefilter. 39 minutes into the test, the OEM filter was allowing 55% of particlesabove 30 microns through the filter and back into the transmission. At 77.5minutes, the CAT filter still allowing 0 particles above 30 microns past thefilter.Dirt Capacity TestingA filter needs to be able to hold the debris it collects over the service life ofthe filter. We wanted to know exactly how many grams of debris each filtercould hold before it gave up and opened the bypass, sending unfiltered fluidback into the transmission. The OEM Allison filter held 4.1 grams of grit andthe CAT filter held 17.7 grams of grit. Proving a 430% increase in holdingcapacity.Flow TestingWe wanted to know the exact difference in flow restriction between the CATfilter with its adapter, vs OEM. With a better filtration rating comes thequestion, how well can it still flow oil? This is where the massive amount offiltering media inside the CAT filters gets to shine. When tested at 1.3 GPMat 35 kPa, The CAT filter with the adapter flowed 188% more efficient thanthe OEM Allison Filter.Leak TestingA hydrostatic burst test was performed at 200+PSI in a very frigidenvironment. Both the adapter, filters, and oil sat in -30 degrees Celsius for5 hours before the test. At the worst conditions possible with oil beingthick/viscus, and rubber seals wanting to shrink, we wanted to know theadapter’s O-Ring and filter’s O-Rings would stay sealed. The Allison filterheld to 246 PSI. The CAT Filter / Adapter held till 258 PSI, proving a better,strong seal. After testing different rubber compounds and their durability,we chose a very strong, resilient, O-ring for the adapter to transmission seal.
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