TH400 Torque Converters & TH400 Stall Converters

The Turbo Hydra-Matic 400 automatic transmission is the heavy-duty version of the TH350. Starting in the 1960s, TH400s were found in heavier, more powerful GM vehicles,...

The Turbo Hydra-Matic 400 automatic transmission is the heavy-duty version of the TH350. Starting in the 1960s, TH400s were found in heavier, more powerful GM vehicles, like trucks. Because of their strength, reliability, and their compatibility with small and big block Chevy engines, they became popular options for performance builds, like race cars and off-road vehicles.

A torque converter—also called a stall converter when it features higher stall speed—is a fluid coupler that transfers power from your engine’s flexplate to the transmission. It’s roughly equivalent to the clutch on a manual transmission vehicle. For more details on how they work and how to choose one for your application, check out this video on our blog, On All Cylinders.

Your stock converter is fine for everyday driving, but an aftermarket converter can change the way your TH400 transmission performs. Generally, a higher stall speed can help you launch harder, while a lower stall speed is great for towing. The heat and pressure created by high horsepower can also cause ordinary converters to “balloon” or expand, causing misalignment and damage. Most aftermarket converters are reinforced with anti-ballooning features to survive these conditions.

Top Brands

As the vital link between your engine and your TH400 automatic transmission, you need a reliable torque converter that can handle the demands of performance driving. Summit Racing Equipment only carries converters from trusted name brands like TCI Auto, Hughes, B&M, Hays, Allstar Performance, and more. They’re the parts we use on our own project vehicles!

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VEGE Remanufactured 1,700-1,800 Stall Torque Converter TQBU3HF

Torque Converter, GM TH400 65-86 FB HS

Part Number: CCV-TQBU3HF

Not Yet Reviewed

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VEGE Remanufactured Stock Stall Torque Converter TQBU3

Torque Converters, Remanufactured, OEM Style, 1.875 in. Slotted Hub, 3 Pad, 13.0 in. Dia., 1,200 Stall, Avanti, Checker, Excalibur, GM, Jeep, V6, Each

Part Number: CCV-TQBU3

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Engine Works Performance 2,700-3,000 Stall Torque Converter 500001

Torque Converter, Performance, 10 in. Diameter, 2,700-3,000 Stall, Chevy, TH350/TH400, Each

Part Number: EW1-500001

Not Yet Reviewed

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Engine Works Performance 2,000-2,200 Stall Torque Converter 500002

Torque Converter, Performance, 10.750 in. Diameter, 2,000-2,200 Stall, Chevy, TH350/TH400, Each

Part Number: EW1-500002

Not Yet Reviewed

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VEGE Remanufactured Stock Stall Torque Converter TQBU2

Torque Converters, Reman., OEM Style, 1.875 in. Slotted Hub, 3 Pad Mount, 13.00 in. Dia., Stock Stall, Buick, Cadillac, Oldsmobile, Pontiac, Each

Part Number: CCV-TQBU2

Not Yet Reviewed

Estimated Ship Date: Mar 18, 2026 if ordered today

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Estimated Ship Date: Mar 18, 2026 if ordered today

VEGE Remanufactured 1,200 Stall Torque Converter TQBU6

Torque Converters, Remanufactured, OEM Style, 1.875 in. Slotted Hub, 6 Pad Mount, 13 in. Diameter, 1,200 Stall, Avanti, Checker, Excalibur, GM, Each

Part Number: CCV-TQBU6

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Mar 18, 2026 if ordered today

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Estimated Ship Date: Mar 18, 2026 if ordered today

VEGE Remanufactured 1,200 Stall Torque Converter TQBU6FB

Torque Converters, Remanufactured, OEM Style, 1.875 in. Slotted Hub, 6 Pad Mount, 13.00 in. Diameter, 1,200 Stall, 30 Spline Input, Chevy, GMC, Each

Part Number: CCV-TQBU6FB

Not Yet Reviewed

Estimated Ship Date: Mar 17, 2026 if ordered today

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Estimated Ship Date: Mar 17, 2026 if ordered today

VEGE Remanufactured 1,700-1,800 Stall Torque Converter TQBU3HS

Torque Converters, Remanufactured, OEM Style, 1.875 in. Slotted Hub, 3 Pad Mount, 13 in. Dia., 1,700-1,800 Stall, Avanti, Checker, Excalibur, GM, Each

Part Number: CCV-TQBU3HS

Not Yet Reviewed

Estimated Ship Date: Mar 18, 2026 if ordered today

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Estimated Ship Date: Mar 18, 2026 if ordered today

Engine Works Performance 2,200-2,600 Stall Torque Converter 500000

Torque Converter, Performance, 11 in. Diameter, 2,200-2,600 Stall, Chevy, TH350/TH400, Each

Part Number: EW1-500000

Not Yet Reviewed

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ATI Super Streetmaster Custom Stall Torque Converter ATI408320

Torque Converter, Super Streetmaster, Custom Order, 10.00 in. Diameter, Chevy, TH350, TH400, Each

Part Number: ATI-408320

Not Yet Reviewed

Estimated Ship Date: Jan 28, 2026 if ordered today

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Estimated Ship Date: Jan 28, 2026 if ordered today

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VEGE Remanufactured Stock Stall Torque Converter TQBU3FB

Torque Converters, Remanufactured, OEM Style, 1.875 in. Slotted Hub, 3 Pad Mount, 13.00 in. Dia., Stock Stall, 30 Spline Input, Chevy, GMC, 6.2L, Each

Part Number: CCV-TQBU3FB

Not Yet Reviewed

Estimated Ship Date: Mar 18, 2026 if ordered today