Overhaul kit plus a Raybestos RCP96-075 friction module for 1996-2011 GM 4L80E and 4L85E rebuilds. Gaskets, seals, rings and clutches, no steels.
If the 4L80E in your Silverado or Sierra 2500/3500, Suburban 2500, Express or Savana van, Yukon XL 2500 or Hummer H1 came apart with black, glazed frictions but the drums and steels still look good, this is the kit that puts it back together without paying for parts you will not use. It pairs a WIT overhaul gasket and seal kit (interchange W34004EA) with a Raybestos friction module, part number RCP96-075, and is listed for 1996-2011 4L80E and 4L85E units. There are no steel plates in the box, by design.
Every clutch pack in the 4L80E is a stack of lined frictions sandwiched between steel plates and squeezed by a hydraulic piston. When the frictions glaze or wear thin, the pack needs more pressure and more time to lock, so the shift flares, the slip makes heat, and the heat cooks the fluid and the next pack. A banner kit replaces the two things that wear out in that chain: the friction linings and the rubber and Teflon that hold apply pressure on the pistons and sealing rings. The Raybestos module supplies the frictions for the unit's packs plus the band in the counts the unit uses, and the WIT side supplies the gaskets, lip seals, O-rings, sealing rings, check balls and small parts you discard at teardown.
One 4L80E detail worth knowing before you build: Transmission Digest notes that the overdrive roller clutch rides inside the overrun (coast) clutch drum, holding in first through third and freewheeling in fourth. Inspect that roller clutch while the drum is open rather than assuming new frictions will fix every overdrive complaint.
Rule out the cheap causes first. Scan for codes, check the speed sensors and solenoids, and confirm line pressure, because a stuck pressure control solenoid can mimic a burnt pack. Our 4L80E EPC solenoid symptoms guide covers that test, and Silverado 2500 shift problems walks through the truck-side diagnosis. If pressure is in range and the pan is full of debris, the packs are the problem and the unit needs to come out. For a sense of where a banner kit fits in the total job, see what drives 4L80E rebuild cost.
The listing covers the 1996-2011 GM 4L80E and 4L85E behind the 5.7, 6.0, 8.1 and 6.5/6.6 diesel in heavy-duty Chevrolet and GMC trucks and vans, plus motorhome and commercial chassis using the same unit. Two cautions: 1991-1995 units use different sealing parts, and GM converted the 4L80E to center-gearbox lubrication in 1997, which changed a number of internal parts. If yours is a 1996, send us your year and VIN, or match the old kit's seal sizes, before ordering. Browse every part for this unit on the 4L80E collection page.
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Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. It is a banner kit: the full overhaul seal and gasket set plus the Raybestos RCP96-075 friction module. Steels are reused if they are flat, the right thickness and free of heat discoloration. If yours are blued or coned, buy a master kit with steels instead.
No. The listing covers 1996-2011 units, and 1991-1995 transmissions use different sealing parts. Order a kit listed for the early years.
Yes. The listing covers both the 4L80E and the heavier-duty 4L85E within 1996-2011. Confirm with your year and VIN if your truck had a mid-year change.
Not if the slip is in the converter clutch. A converter slip code with good clutch packs points to the torque converter, which should be inspected or rebuilt any time the transmission is overhauled.
Use Dexron VI. GM lists it as the replacement for the earlier Dexron fluids these trucks shipped with. Fill to the cold mark and recheck at operating temperature.
