Sprags--or one-way clutches--are extremely important in GM TH350 and TH400 transmissions because they carry an up-shifting torque load. Prevent transmission failure with sprags and races from ATI Performance Products and compete with increased confidence.

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ATI Performance Products Sprag, Direct Drum, Steel, Heavy-Duty, GM, TH350, Each

ATI Performance Products Sprag, Direct Drum, Steel, Heavy-Duty, GM, TH350, Each

$809.30

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ATI Performance Products Drum Assy Kit, Al Direct w/ Billet Piston, w/ Steel Outer Sleeve, 36 Element- Hd Clutches / Steels, 4L80E 4L85E T400 400

ATI Performance Products Drum Assy Kit, Al Direct w/ Billet Piston, w/ Steel Outer Sleeve, 36 Element- Hd Clutches / Steels, 4L80E 4L85E T400 400

$1,976.32

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TCI Automatic Transmission Direct Drum, Steel, High Gear Assembly, GM, TH400, Kit

TCI Automatic Transmission Direct Drum, Steel, High Gear Assembly, GM, TH400, Kit

$844.25

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

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

$50.46

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ATI Performance Products Race, Heavy Duty Intermediate Roller Clutch Outer

ATI Performance Products Race, Heavy Duty Intermediate Roller Clutch Outer

$129.39

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TCI 700R4/4L60E Forward 29-Element Sprag

TCI 700R4/4L60E Forward 29-Element Sprag

$162.15

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