6L90 Drum Kit 1-2-3-4 3-5 Reverse for GM 2006-Up 24259851

6L90 Loaded Forward and Direct Drum Kit — 1-2-3-4 and 3-5-Reverse — for GM 6L90 Six-Speed Automatic Transmissions, 2006-Up

Reference: ACDelco/GM 24259851

About This Part

This is a loaded forward and direct clutch drum kit for GM 6L90 transmissions. It serves the 1-2-3-4 clutch pack and the 3-5-reverse clutch pack, supporting forward-gear engagement and reverse operation.

When To Consider Replacement

Consider this drum kit when transmission inspection identifies a cracked, worn, leaking, or damaged forward and direct drum. Common rebuild concerns can include slipping, delayed engagement, harsh shifting, or loss of clutch apply pressure. Diagnose the transmission before replacing internal components; this part is not a complete repair solution for every shifting or engagement issue.

Dimensions And Identification

• Part type: Loaded forward and direct clutch drum kit

• Transmission: GM 6L90 six-speed automatic

• Clutch positions: 1-2-3-4 and 3-5-reverse

• Application range: 2006-up, subject to transmission and component verification

• Outside diameter: 8-5/16 inches

• Height: 4.930 inches

• Reference number: 24259851

Fitment Verification

Confirm the transmission code, original part number, drum dimensions, and snap-ring-to-top measurement before ordering. Vehicle make, model, and year alone are not sufficient to establish compatibility.

Installation And Fluid Service

Have a qualified transmission installer inspect mating components and follow the applicable service procedures for assembly, clearances, and fluid filling. Use the vehicle manufacturer’s specified ATF. If using Lubegard ATF Protectant during service, verify application compatibility and follow its product directions; it does not replace the repair of worn or damaged parts.