4L85E Banner Rebuild Kit, new and ready to install. Fits the 4L85E. Ships fast from the USA.
A banner kit is the reseal-and-pistons package for a 4L85E rebuild, for the builder who is buying clutch plates separately or reusing a pack that measured good. If your GM heavy-duty pickup, Suburban or Express/Savana van is leaking from several places, losing apply pressure, or is already on the bench for a rebuild, this kit covers the soft goods that seal every circuit. The photo shows the valve body and case gasket set, sealing rings and lip seals, and the piston assemblies, with no friction or steel plates.
Every clutch in the 4L85E is applied by a piston in a drum or the case, and every piston depends on its seals and the gaskets between the pump, case, valve body and separator plate. When those harden or tear, apply pressure bleeds off before it reaches the plates. That reads as slipping, but the plates were never at fault. A banner kit replaces those sealing parts and the pistons together, so pressure reaches the packs at the rate the valve body commands. It is the right buy when you want to choose your own frictions, for example a high-energy upgrade for a towing truck, rather than take the set inside a master kit.
An air check on the bench tells you which circuit is leaking. On the vehicle, start with a line pressure test. Very high pressure in Reverse with a buzzing noise is the worn boost valve sleeve in the pump, not a seal, and it has to be repaired or it will break the parts you just sealed. Our 4L85E common problems guide walks through those checks, and the 4L85E pump failure guide separates a worn pump from a worn boost valve sleeve.
This listing is the general 4L85E banner kit, cataloged without a year range. GM changed internal parts in 1997, when this family went to center-gearbox lubrication, and again in 1999, so gaskets and pistons are not universal across every year. Before ordering, check the build tag on your case, or send us your year and VIN and we will confirm the match. If your unit is a 1997 or later, the 4L85E banner rebuild kit for 1997-2011 is listed for that range. All parts for this unit are in the 4L85E parts collection.
For the wear points that bring these units back after a rebuild, read our 4L85E rebuild wear points guide.
| Fits | 4L85E |
| Part type | Banner Rebuild Kit |
| Condition | New |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
A banner kit carries the gaskets, seals and pistons. A master kit adds the friction and steel plates. Pick the banner kit when you are buying frictions separately or your plates measured good.
It is listed as a general 4L85E kit with no year range. GM changed internal parts in 1997 and 1999, so check your build tag or send us your year and VIN before ordering. For 1997-2011 units there is a dedicated listing.
Only if the slip comes from a leaking piston or circuit. Burnt frictions, a worn boost valve sleeve or a bad solenoid will still slip. Test line pressure and air-check the circuits first.
Dexron VI. Prime the pump on install and check the level with the transmission at operating temperature.
The photo shows gaskets, seals, sealing rings and pistons only. Plan on buying a filter and any bushings your teardown calls for separately.
