When the 4-5-6 clutch circuit in a 6L80E or 6L90E loses hydraulic pressure, the source is often the sealing ring assembly at that location, and replacing it with the correct z-pack is the direct fix. This listing covers one sealing ring pack specifically sized and configured for the 4-5-6 circuit in 6L80E, 6L90E, and 6L80 automatic transmission units built from 2006 onward.
The 4-5-6 clutch pack is a pressure-critical circuit in these transmissions. A worn or distorted sealing ring in that area bleeds hydraulic pressure before it reaches the clutch pack, causing soft or missing shifts in the upper gear range. Installing the correct replacement sealing ring restores the circuit seal and allows the clutch to engage as designed.
This is a single-component item. It does not include friction discs, steel plates, an Automatic Transmission Filter, a gasket set, a band, or any other parts associated with a full rebuild. If your job requires additional components, those need to be sourced separately. Review your teardown notes and parts list before placing the order.
This item ships with a parts sheet inside the box identifying the component. Each unit is pulled and verified individually before packing, which is standard practice across everything assembled at REMCO since 1991.
To confirm fitment, check that your transmission carries one of the following unit codes: 6L80E, 6L90E, or 6L80, and that it was produced in or after 2006. Do not rely on vehicle model alone to determine the unit code, as the same vehicle platform can carry different transmission variants depending on engine and production date.
- Targets the 4-5-6 clutch circuit sealing in 6L80E and 6L90E units, addressing leak points that cause pressure loss and shift failure in that clutch pack.
- This is a single z-pack sealing ring component only. It does not include friction discs, steel plates, Automatic Transmission Filter, band, or any other rebuild parts. Check your parts list before ordering.
- The 4-5-6 circuit is a known pressure-sensitive area in these units. Using the correct sealing ring geometry for this specific location helps maintain hydraulic integrity where it counts.
- One z-pack sealing ring assembly for the 4-5-6 clutch circuit. Item weight: 3.05 lb. Verify count and condition on arrival against the included parts sheet inside the box.
- Before ordering, confirm your unit code is 6L80E, 6L90E, or 6L80, and that your application falls within the 2006-and-up production range. Unit codes vary and mismatches are the most common return reason.
What's in the box
- 1 x 6L80E Z-pack 4-5-6 90
Compatible vehicles
- Fits CTS-V [06-15], Escalade/ESV/EXT [07-15], SRX [06-09], STS [06-11], XLR [06-11], Camaro [10-13], Corvette [06-11], SS [14-17], Avalanche [08-13], Express 2500 [10-11], Express 3500 [10-11], Silverado 1500 1/2 Ton [07-09].
| z-pack Raybestos gm 4-5-6 6l80 90 Automatic transmission |
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