6R140W [11-UP] Automatic Transmission Ring Kit Sealing

A failed or worn sealing ring in the 6R140 automatic transmission can allow internal fluid pressure to bleed off at the wrong moment, leading to soft shifts, delayed engagement, or progressive clutch damage that turns a minor repair into a major rebuild. This listing covers a single sealing ring cataloged under model 6R140W, offered as a stand-alone component for technicians who have already identified exactly which piece needs to be replaced and do not need a full kit.

The 6R140 is a heavy-duty automatic transmission unit, and the sealing rings inside it work under sustained hydraulic pressure every time the unit cycles through a gear change. When one ring loses its sealing surface or cracks, the symptom often shows up as a pressure-related code or inconsistent clutch apply, not always as an obvious leak. Replacing the affected ring without disturbing unrelated components is a legitimate and efficient repair strategy when the diagnosis is solid.

Because this is a single-piece item, it does not include friction discs, steel plates, an Automatic Transmission Filter, gaskets, or a band. If your rebuild calls for those parts, they would need to be sourced separately. Before placing the order, verify that the model code stamped or tagged on your unit reads 6R140W specifically, as other variants within the 6R140 family may use rings with different dimensions. The part number for this ring is. Item weight is 0.2 lb. REMCO has been working in automatic transmission parts since 1991, and each item is individually checked against its part description before it leaves the facility.

• Skip a full disassembly cycle: replacing this sealing ring early stops fluid bypass before it causes deeper clutch or drum wear in the 6R140 unit.
• This listing covers one sealing ring only. It does not include friction discs, steel plates, Automatic Transmission Filter, gaskets, bands, or any other components. Review your parts list before ordering.
• Designed specifically for the 6R140W model code: the ring dimensions match that variant, so it installs without modification or adapting to a close-but-not-right alternative.
• One (1) sealing ring for the 6R140W automatic transmission. Item weight: 0.2 lb. Packed and verified against the part description before shipment.
• Before ordering, confirm the exact model code on your unit is 6R140W, not a different 6R140 variant. Confirm the production year as well, since fitment depends on both.

What's in the box

• 1 x Ring Kit, 6R140W Sealing

Compatible vehicles

• Fits F250 Super Duty 3/4 Ton - Pickup [11-17], F350 Super Duty 1 Ton - Pickup [11-17], F450 Super Duty 1 1/2 Ton Truck [11-17], F550 Super Duty [11-17].