4L80E Clutch Module 1997-2009, new and ready to install. Fits the 4L80E. Ships fast from the USA.
Opening up a 1997-2009 4L80E from a Silverado or Sierra 2500 or 3500, a Suburban 2500, an Express or Savana van or a Hummer and finding steels that are blued, glazed, warped or cupped means new frictions alone will not fix the slip. This is a new 21-piece steel clutch plate module that replaces every steel in the five clutch packs of a 1997-2009 4L80E, and it also covers the 2002 4L80E-HD (MN8) and the 2002-2009 4L85E. It is steel plates only: frictions, seals and gaskets are not in the box, so plan on pairing it with a friction module.
Every clutch pack in this transmission is a stack of lined friction discs splined to one member and plain steel plates splined to the other. When the piston applies, the steels are what the frictions clamp against, and they soak up most of the heat from each shift. A steel that has been overheated loses its flatness and surface finish, so a fresh friction pack running against it will glaze and slip again in short order. This module supplies the steels for all five locations, each at the thickness that clutch was designed around:
The turbulator holes on the fourth and overrun steels keep oil moving across the plates, which helps those two packs run cooler and with less drag while they freewheel.
Slip codes such as P0734 (fourth gear incorrect ratio) can come from worn clutches, but low pressure causes them too. Read our 4L80E 3-4 clutch failure guide before you tear the unit down.
Check line pressure and the pressure control solenoid first, because a weak EPC circuit will burn new plates as quickly as the old ones. Our 4L80E EPC solenoid symptoms guide walks through it, and the 4L80E pressure control solenoid is here if yours tests bad. Once the unit is apart, lay each old steel on a flat surface and check it with a feeler gauge, and look for heat color. If any steel in a pack is damaged, replace the whole set.
Listed for the 4L80E from 1997 through 2009, the 2002 4L80E-HD (MN8) and the 4L85E from 2002 through 2009. Those units were used mainly in Chevrolet and GMC 2500 and 3500 pickups, Suburban 2500, Express and Savana vans, Hummer, and some motorhome and commercial chassis. Year, make and model alone do not prove fitment, because not every engine and drivetrain in those lines used a 4L80E. Count the plates in each pack of your old unit and measure their thickness against the list above. If they do not match, or you are unsure, send us your year and VIN before ordering. More parts for this unit are on the 4L80E collection page.
| Fits | 4L80E 1997-2009 |
| Part type | Clutch Module |
| Condition | New |
| Brand | GM |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. It contains 21 steel plates only. Frictions, seals and gaskets are sold separately, and most rebuilds replace frictions and steels together.
Yes, it is listed for the 2002-2009 4L85E as well as the 1997-2009 4L80E and the 2002 4L80E-HD (MN8). Compare plate count and thickness with your old packs to be sure.
Only if they are flat, not heat colored and not worn smooth. Overheated or warped steels will glaze new frictions quickly, which is why towing and plow units usually get new steels.
The four fourth-clutch steels and the three overrun-clutch steels, all .099 in thick. They go only in those two packs.
GM calls for Dexron VI in the 4L80E. Soak new frictions in the same fluid before assembly and check the level hot after the first drive.
