When the 3T40 slips or burns up its clutch packs, the repair starts with getting the right friction discs in the right thicknesses - and this kit puts all fifteen of them in one box. What sets this kit apart from a generic friction assortment is specificity: three separate friction specs are included, each matched to a distinct clutch pack in this transmission.The forward direct clutch pack in the 3T40 uses two different disc thicknesses, and both are here: five frictions at .069 and five at .080, covering the layered apply stack that this automatic transmission relies on for forward engagement. The low reverse clutch pack gets five frictions at .090, the thickest of the three, which reflects the load that apply sees during low and reverse operation.REMCO has been working in automatic transmission parts since 1991. This kit is assembled here, piece by piece, counted against its part list before the box closes. The packing list rides inside the box so the rebuilder can verify count at the bench before teardown is complete.This is a Friction Kit - the content is friction discs and nothing else. Steel plates, seals, gaskets, filter, and band are not included. If your repair requires those components, they need to be sourced separately. Confirm the unit code is 3T40 or TH-125 and that it was built 1984 or later before placing the order. Clutch pack disc counts can vary by application year and assembly variant, so cross-referencing your stack depth before ordering is always the right call. This kit covers all three clutch packs in the 3T40: five forward direct frictions at .069, five at .080, and five low reverse frictions at .090 - 15 discs total for a complete friction refresh. This is a Friction Kit - it contains friction discs only. No steel plates, no filter, no gaskets, no seals, no band. Check what else you need before ordering to avoid a second trip. All three friction thicknesses in one box: the .069 and .080 forward direct discs address the dual-layer clutch pack design of the 3T40, while the .090 low reverse discs handle the heaviest-duty apply in this unit. Box contains exactly 15 pieces: 5x TH125 forward direct clutch friction .069 [84-UP], 5x TH125 forward direct clutch friction .080 [84-UP], 5x TH125 low reverse clutch friction .090 [84-UP]. Shipped weight: 1 lb. Before ordering, confirm your unit is a 3T40 (also cataloged as TH-125) built 1984 or later. Verify clutch pack depth and disc count against your unit before assuming this count is correct for every variant.