When the only thing standing between a clean fluid circuit and contaminated flow is the filter, having the right one for the specific unit matters. This listing covers a single filter designed for the 3T40 automatic transmission, cataloged under model reference TH-125 and part number 125125C, covering applications from 1980 onward with no defined end date. What sets this filter apart from a kit listing is straightforward: it is one piece, one function, and nothing else is packed alongside it. No gaskets, no seals, no pan hardware. If your repair calls for only the filter and you have already sourced the remaining components, this is the correct item to order. The 3T40 has been a long-running automatic transmission platform, and sourcing a filter that is cataloged directly to that unit avoids the guesswork of cross-referencing a generic part. At approximately 1 lb, the filter ships light but is verified against its part listing before it leaves the facility. REMCO has worked in automatic transmission parts since 1991, and each item that goes into a box here is checked against its catalog entry so what arrives matches what was ordered. Confirm that your unit is identified as a 3T40 or TH-125 and that part number 125125C corresponds to the filter configuration on your application before placing the order. One filter is what this listing covers: a direct replacement for the 3T40 automatic transmission, model reference 125125C, for units from 1980 onward. This listing does not include a filter kit, gaskets, seals, clutch packs, steels, bands, or any additional components. Verify you need only the filter before ordering. The 3T40 platform has been in service since 1980 and this filter is cataloged specifically for that unit, not adapted from a generic part number. Contents: one (1) transmission filter, model 125125C, shipping weight approximately 1 lb. No additional pieces are packed in the box. Before ordering, confirm your unit is a 3T40 (also referenced as TH-125) and that the filter neck style and pan configuration match this part number 125125C.