4L60E Input Drum 1998-04, remanufactured and ready to install. Fits the 4L60E. Ships fast from the USA.
A 1998 to 2004 Silverado, Sierra, Tahoe, Yukon, Suburban, S10 or Blazer that keeps burning 3-4 clutches, drops 3rd and 4th, or slips into Drive is often leaking oil inside the input drum itself. This remanufactured 4L60E input drum for 1998-2004 is the full input housing with the input shaft installed, as shown in the photo. It is cleaned, inspected and backed by a 1-year warranty, so the rebuild starts on a housing that holds pressure.
The input housing is splined to the torque converter turbine through its shaft and turns at engine-side speed in every forward gear. Three clutch packs live in or on it: the 3-4 clutch, the forward clutch and the overrun clutch, and the input sprag sits between the forward and overrun sections. Oil reaches those pistons through the Teflon sealing rings on the shaft, which ride inside the pump's stator support, then through feed holes drilled into the housing. The shaft is pressed into the housing, and that press fit is itself a sealing surface. If it leaks, 3-4 apply oil bleeds away and the clutches slip and burn no matter how good the new frictions are.
Most burnt 3-4 packs are caused by low line pressure or 3rd gear oil leaks somewhere in a long hydraulic circuit, so check pressure and the valve body before blaming the drum. Our 4L60E 3-4 clutch pack diagnosis guide walks through it. Once the drum is out, Sonnax recommends three specific tests: air-check the loaded drum so the 3-4 and forward clutches apply without leaking, air-check the empty housing from the 3-4 feed port to find leaks between shaft and housing, and vacuum test the housing checkball, which must hold 25 in-Hg. A galled shaft bore cannot be repaired and means the housing has to be replaced. For Drive engagement complaints, see our forward clutch and sprag guide.
This listing covers 4L60E units built from 1998 through 2004, the core GMT800 truck and SUV years plus the last S10 and Blazer models. These years used more than one converter and stator support arrangement, and the input shaft has to match your converter and pump, so compare the shaft length, spline and sealing ring grooves with your old part before installing. If your unit is a 4L65E, check the 3-4 clutch stack height as well, since that version carries a larger pack. When in doubt, send us the year, vehicle and VIN and we will confirm. Earlier and later housings are on the 4L60E parts page.
| Fits | 4L60E 1998-04 |
| Part type | Input Drum |
| 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.
Yes. The photo shows the input housing with the input shaft installed. Compare the shaft length and spline count with your old part before installing.
The most common causes are low line pressure and 3rd gear oil leaks, including leaks between the input shaft and housing. Air-check the housing and vacuum test the checkball; a leaking original housing will burn new clutches.
The 4L65E uses a larger 3-4 clutch pack than the 4L60E, so check stack height and shaft details against your original. Send us your year and VIN if you are unsure.
New Teflon sealing rings, both stator support bushings, the housing-to-forward-clutch O-ring, and new frictions, steels and seals for the 3-4, forward and overrun packs. Inspect or replace the input sprag.
There is no programming for the drum itself, but after a rebuild, drive gently through all shifts while the computer adapts, and check the fluid level hot with Dexron VI.
