ATI Performance automatic transmission drums eliminate the need for steel bushings and sleeves that can expand under heat and come loose, ultimately causing transmission failure. They come equipped with Torrington bearings and are designed to triple clutch life and lower ETs.

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ATI Performance Products Sprag, Roller Type, Steel, for GM TH400 Automatic Transmission (1966 and Later), Each

ATI Performance Products Sprag, Roller Type, Steel, for GM TH400 Automatic Transmission (1966 and Later), Each

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ATI Performance Products Drum, Alum Direct w/ Billet For 6 Clutches, 34 Element Sprag, 400

ATI Performance Products Drum, Alum Direct w/ Billet For 6 Clutches, 34 Element Sprag, 400

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TCI Powerglide 10-Clutch Steel Complete Drum Kit.

TCI Powerglide 10-Clutch Steel Complete Drum Kit.

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ATI Performance Products Outer Race, For 34 Element Sprag, T400

ATI Performance Products Outer Race, For 34 Element Sprag, T400

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ATI Performance Products Drum Assy, Alum Direct w/ 6 Clutches, Billet Piston, 34 Element Sprag, Loaded, T400 400

ATI Performance Products Drum Assy, Alum Direct w/ 6 Clutches, Billet Piston, 34 Element Sprag, Loaded, T400 400

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TCI 700R4/4L60E Low Roller Clutch

TCI 700R4/4L60E Low Roller Clutch

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