4L85E Clutch Module, new and ready to install. Fits the 4L85E. Ships fast from the USA.
Heavy-duty GM trucks with the 4L85E work hard: 8.1L and 6.0L pickups, vans and chassis cabs that tow, plow and haul all day. When one of those units starts slipping in a single gear or flaring between shifts, a worn clutch pack is the most common cause. This is a Raybestos Clutch-Pack module for the 4L85E, a packaged set of plates for one clutch position. The product photo shows the Raybestos-branded steel plates with external drive tabs. It is the right order when you have found which clutch failed and want to rebuild that pack without buying a whole kit.
A clutch pack is a stack of alternating plates: frictions splined to one member and steels tabbed to another. When the piston clamps the stack, the two members lock together. The 4L85E uses five of these packs (overrun, forward, direct, intermediate and fourth) along with two bands. The steels carry heat away from the friction faces, so when a pack slips they turn blue, warp or develop hot spots, and new frictions against old steels will not hold for long. Replacing the pack as a matched set is what restores the holding capacity this transmission needs under load.
Note which gears slip and compare them with the clutch application chart in our 4L85E common problems guide. Then find out why the pack burned, or the new one will burn too. Sonnax documents that on 1995-later units a worn reverse checkball sleeve in the 3-4 shift valve bore bleeds direct clutch oil, causing 3rd and 4th slip and a burnt direct clutch. Our 4L85E 3-4 clutch failure guide covers that check and the drum bore wear that causes the same symptom.
This module is listed for the 4L85E with no year range, and it shares the 4L80E design. Plate counts and thicknesses differ between clutch positions and between some model years, so tell us which clutch you are replacing and send your year and VIN, and we will confirm the pack matches before it ships. Dated versions such as the 1997-2009 clutch module are listed separately, and the full parts range is on the 4L85E collection page.
| Fits | 4L85E |
| Part type | Clutch Module |
| Condition | New |
| Brand | Raybestos |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
A packaged plate set for one clutch position. The product photo shows the steel plates; tell us which clutch you are rebuilding so we can confirm the pack contents match it.
The 4L80E and 4L85E share the same design, and many packs interchange, but some plate counts differ. Send your year, VIN and clutch position and we will check.
Not if they are blued, warped or have hot spots. Worn steels shed heat poorly and will glaze new frictions quickly.
Common causes are worn sealing rings, a worn drum bore, or valve body checkball sleeve wear that bleeds apply oil. Find the cause before installing a new pack.
Reset the adaptive values with a scan tool if your controller supports it, then drive through all shifts so the system relearns.
