TH700 4L60 4L60E 4L65E 2nd Apply Piston Inner Teflon Ring [82-13]

When the inner teflon ring at the second apply piston loses its seal, hydraulic pressure bleeds past the bore and the transmission struggles to build a clean 1-2 shift. This single ring, sized at 2.321 in. for the inner position, addresses that specific failure point in TH700, 4L60, 4L60E, and 4L65E automatic transmission units built from 1982 through 2013.

Teflon is the correct material for this location. Unlike rubber rings that crack or extrude after repeated heat cycles, teflon holds its cross-section and maintains consistent contact with the bore wall across a wide temperature range. That matters here because the second apply piston operates every time the unit shifts into second gear, meaning this ring sees thousands of pressure pulses over the life of the transmission.

This is the inner ring only. If your diagnosis points to the outer position, or if you need additional sealing rings elsewhere in the unit, those are separate items. Check your inspection notes against the position and diameter before placing the order.

The part covers a long production run, but transmission codes and assembly dates can overlap or vary by application. Confirm that the identification stamped or tagged on the actual unit reads TH700, 4L60, 4L60E, or 4L65E, and that the model year is within the 1982-2013 range. REMCO has been working in automatic transmissions since 1991, and every item ships with a part list so you can verify what you received against what was ordered.

• Restores hydraulic sealing at the second apply piston inner bore, preventing pressure loss that causes soft or delayed 1-2 shifts in TH700 and 4L60-family units.
• This listing is for the inner ring only. It does not include the outer ring, any other sealing rings, clutch packs, steels, filter, or gaskets. Verify which ring position you need before ordering.
• Teflon construction holds its shape under heat and pressure cycles, maintaining a consistent seal at the inner piston bore where rubber substitutes tend to extrude or harden over time.
• One teflon sealing ring, inner position, 2.321 in. diameter. Part of the second apply piston circuit. Item weight: 1 lb.
• Before ordering, confirm the transmission code on the unit matches TH700, 4L60, 4L60E, or 4L65E, and verify the model year falls within the 1982-2013 application range.