4L80E Sprag Clutch, remanufactured and ready to install. Fits the 4L80E. Ships fast from the USA.
A rolled intermediate sprag usually ruins the drum it rides in, which is why most 4L80E rebuilders replace the two together. This is a remanufactured bare 4L80E direct clutch drum with a 34-element intermediate sprag fitted, for builders who already have their own clutches and want a known-good drum for a Chevrolet or GMC 2500 or 3500 pickup, Suburban 2500, Express or Savana van, Hummer H1 or a swap project. It comes without frictions, steels or piston seals, so you set it up with the pack from your overhaul kit.
The direct drum does two jobs. Inside it, the direct clutch pack applies for third and fourth and also for Reverse. In its hub sits the intermediate sprag, a one-way clutch that works with the intermediate clutch on the center support. In second the sprag locks and holds the sun gear; on the 2-3 shift it freewheels so the direct clutch can take over smoothly. A sprag with more elements spreads the holding load across more contact points, which is why the 34-element design is the common choice for trucks that tow or carry a tune. When the sprag rolls, the race inside the drum gets damaged with it, and a new sprag in an old race rarely lasts.
A loss of second is not always mechanical. Stuck shift solenoids and wiring faults set codes and put the 4L80E in odd gear patterns, so pull codes and test using our 4L80E shift solenoid guide. In a Silverado or Sierra, the 4L80E Silverado 2500 shift problems guide walks through separating electrical and mechanical slip. If the unit is already apart and the sprag spins both ways, or the race is marked, you have your answer.
This drum is listed for the GM 4L80E and is supplied as a 1997-up style drum; it may suit earlier units, but that is not guaranteed. Because direct drums and sprag races changed over the 4L80E's production, the safe approach is to measure your old drum against this one: hub height, sprag race, bushing size, spline count and how many clutches it takes. The 4L80E race is also taller than a TH400's, so it is not a TH400 drop-in. If you are unsure, send us your year and VIN. For a drum already loaded with a direct clutch pack, see the loaded 1997-up 4L80E drum with sprag; for other parts browse the 4L80E collection.
| Fits | 4L80E |
| Part type | Sprag Clutch |
| Condition | Remanufactured |
| 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.
No. It is a bare drum with the 34-element sprag fitted. Add frictions, steels and piston seals from your rebuild kit.
It is listed for the GM 4L80E; the description points to 1997-up drums. Compare it to your old drum or send us your year and VIN to confirm.
Only if the race in the drum is smooth and undamaged. A rolled sprag usually marks the race, and a new sprag in a damaged race will not hold.
No. The 4L80E sprag race is taller than the TH400 race, so this drum is for the 4L80E and 4L85E family.
Dexron VI ATF. Check the level hot after the first drive.
