Input Drum With Shaft For GM 4L60E 1998-2004 30-Spline 300mm

Input Drum With Shaft For GM 4L60E 1998-2004

OEM Reference Number: 19125752
Industry Reference: 77733L

This input drum and shaft assembly is designed for GM 4L60E automatic transmission rebuilding and repair. It matches the 1998-2004 configuration with a 300 mm shaft, 30-spline torque-converter connection, no pilot, no reluctor, and 3-inch ring height.

Part Configuration

• Transmission application: GM 4L60E

• Year range: 1998-2004

• Shaft length: 300 mm

• Torque converter spline count: 30 spline

• Pilot style: No pilot

• Reluctor style: No reluctor

• Ring height: 3 inches

• OEM reference: 19125752

• Industry reference: 77733L

About This Part

The input drum is a major internal hard part in the 4L60E transmission. It supports internal clutch components and helps transmit power through the transmission assembly. This part is appropriate for rebuilds involving a damaged, worn, scored, cracked, or spline-damaged input drum or shaft.

During installation, inspect the clutch packs, steels, bushings, sealing rings, splines, and related hard parts for wear or heat damage. Proper transmission diagnosis and overhaul procedures are recommended because slipping, delayed engagement, harsh shifting, or clutch failure can have multiple causes.

Fitment Verification Required

Verify the original part before ordering. This drum is specifically configured for 1998-2004 4L60E transmissions with:

• 300 mm shaft

• 30-spline torque-converter connection

• No pilot

• No reluctor

• 3-inch ring height

Do not use this part as a replacement for a drum with a pilot, reluctor wheel, different spline count, different shaft length, or different ring height. Vehicle year alone does not confirm transmission hard-part compatibility.

Service Recommendation

Refill the transmission with the manufacturer-specified ATF after installation. Lubegard ATF Protectant may be used when compatible with the application and according to its product directions.