GM 4L30E Transmission Transgo Valve Body Shift Kit Fits 4L30E 1991-2004 Isuzu, BMW, Cadillac Includes correct fit 3rd Drum Support Bushing with installation tool and Pump Alignment tool Addresses Chronic Low Band failure, Slipping 1st and 2nd gear, 2-3 Cutloose, Direct Clutch failure. Improves and restores correct drivability with added durability. Includes Tech information and procedures to correct/reduce reoccurring low band failure. Installation recommendation: Experienced technician Transmission removal necessary: Yes