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.

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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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FTI Performance MR Series 4,000 Stall Torque Converter MR8082

Torque Converters, MR Series, Hard Hitting, 1.703 in. Crank Pilot Diameter, 30-spline, 9.500 in. Diameter, Race Usage, TH350, TH400, Each

Part Number: FTI-MR8082

3.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

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Summit Racing™ 2,800-3,200 Stall Torque Converter SUM-G2698

Torque Converter, 30-spline Input, 10 in. Diameter, 2,800-3,200 Stall, TH350, TH400, Each

Part Number: SUM-G2698

4.27 out of 5 stars ( 84 )

Estimated Ship Date: Today

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FTI Performance SR Series 3,000-3,200 Stall Torque Converter SR0082

Torque Converter, SR Series, 3,000-3,200 rpm Stall, 10.750/11.500 in. Bolt Circle, 9.5 in. Dia., 1.703 in. Crank Pilot, Chevy, TH350/TH400, Each

Part Number: FTI-SR0082

5.0 out of 5 stars ( 1 )

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FTI Performance MR Series 3,500 Stall Torque Converter MR6082

Torque Converters, MR Series, 1.703 in. Crank Pilot Diameter, 30-spline, 9.500 in. Diameter, Race Usage, TH350, TH400, Each

Part Number: FTI-MR6082

Not Yet Reviewed

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Hays Twister 3/4 Race 2,400-2,800 Stall Torque Converter 97-1D24Q

Torque Converters, Twister 3/4 Race, 1.703 in. Crank Pilot Diameter, 30-spline, 9.600 in. Diameter, 2,400 rpm Advertised Flash Stall, TH400, Each

Part Number: HAY-97-1D24Q

Not Yet Reviewed

Estimated Ship Date: Mar 9, 2026 if ordered today

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Estimated Ship Date: Mar 9, 2026 if ordered today

FTI Performance MR Series 3,800 Stall Torque Converter MR7082

Torque Converters, MR Series, Hard Hitting, 1.703 in. Crank Pilot Diameter, 30-spline, 9.500 in. Diameter, Race Usage, TH350, TH400, Each

Part Number: FTI-MR7082

Not Yet Reviewed

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FTI Performance MR Series 2,800-3,200 Stall Torque Converter MR3082

Torque Converters, MR Series, Hard Hitting, 1.703 in. Crank Pilot Diameter, 30-spline, 9.500 in. Diameter, Race Usage, TH350, TH400, Each

Part Number: FTI-MR3082

Not Yet Reviewed

Estimated Ship Date: Mar 20, 2026 if ordered today

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Estimated Ship Date: Mar 20, 2026 if ordered today

FTI Performance MR Series 2,600-2,800 Stall Torque Converter MR3380

Torque Converters, MR Series, Hard Hitting, 1.703 in. Crank Pilot Diameter, 30-spline, 9.500 in. Diameter, Race Usage, TH350, TH400, Each

Part Number: FTI-MR3380

Not Yet Reviewed

Estimated Ship Date: Mar 20, 2026 if ordered today

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Estimated Ship Date: Mar 20, 2026 if ordered today

FTI Performance MR Series 3,000-3,200 Stall Torque Converter MR0082

Torque Converters, MR Series, Hard Hitting, 1.703 in. Crank Pilot Diameter, 30-spline, 9.500 in. Diameter, Race Usage, TH350, TH400, Each

Part Number: FTI-MR0082

Not Yet Reviewed

Estimated Ship Date: Mar 20, 2026 if ordered today

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Estimated Ship Date: Mar 20, 2026 if ordered today

Summit Racing™ 2,200-2,800 Stall Torque Converter SUM-G2703

Torque Converter, 10 in. Diameter, TH350/TH400, 2,200-2,800 Stall, Each

Part Number: SUM-G2703

4.41 out of 5 stars ( 34 )

Estimated Ship Date: Today

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Summit Racing™ 1,700-2,100 Stall Torque Converter SUM-G2699

Summit Racing™ 1,700-2,100 Stall Torque Converter SUM-G2699

Torque Converter, 12 in. Diameter, Chevrolet, TH350/TH400, 1,700-2,100 Stall, Each

Part Number: SUM-G2699

4.13 out of 5 stars ( 117 )

Estimated Ship Date: Today

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Summit Racing™ 2,000-2,400 Stall Torque Converter SUM-G2701

Torque Converter, 10 in. Diameter, Chevy, TH350/TH400, 2,000-2,400 Stall, Each

Part Number: SUM-G2701

3.18 out of 5 stars ( 17 )

Estimated Ship Date: Today

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FTI Performance ESR Series 3,400-3,600 Stall Torque Converter ESR6082

Torque Converter, ESR Series, 9.50 in. Diameter, 3,400 to 3,600 rpm Flash Stall, TH350, TH400, Each

Part Number: FTI-ESR6082

4.78 out of 5 stars ( 9 )

Estimated Ship Date: Today

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FTI Performance ESR Series 2,800 Stall Torque Converter ESR3380

Torque Converter, ESR Series, 9.50 in. Diameter, 2,800 rpm Flash Stall, TH350, TH400, Each

Part Number: FTI-ESR3380

4.17 out of 5 stars ( 6 )

Estimated Ship Date: Today

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FTI Performance ESR Series 3,800-4,000 Stall Torque Converter ESR8082

Torque Converter, ESR Series, 9.50 in. Diameter, 3,800 to 4,000 rpm Flash Stall, TH350, TH400, Each

Part Number: FTI-ESR8082

4.83 out of 5 stars ( 6 )

Estimated Ship Date: Today

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FTI Performance ESR Series 3,200 Stall Torque Converter ESR0082

Torque Converter, ESR Series, 9.50 in. Diameter, 3,200 rpm Flash Stall, TH350, TH400, Each

Part Number: FTI-ESR0082

5.0 out of 5 stars ( 11 )

Estimated Ship Date: Today

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FTI Performance ESR Series 3,000 Stall Torque Converter ESR3082

Torque Converter, ESR Series, 9.50 in. Diameter, 3,000 rpm Flash Stall, TH350, TH400, Each

Part Number: FTI-ESR3082

4.69 out of 5 stars ( 13 )

Estimated Ship Date: Today

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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: Mar 4, 2026 if ordered today

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Estimated Ship Date: Mar 4, 2026 if ordered today

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FTI Performance ESR Series 3,800 Stall Torque Converter ESR7082

Torque Converter, ESR Series, 3,800 rpm Flash Stall, 30-Spline, 9.500 in. Diameter, TH350, TH400, Each

Part Number: FTI-ESR7082

Not Yet Reviewed

Estimated Ship Date: Mar 20, 2026 if ordered today

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Estimated Ship Date: Mar 20, 2026 if ordered today

Hays Twister 3/4 Race 2,800-3,200 Stall Torque Converter 97-1D28Q

Torque Converters, Twister 3/4 Race, Street/Strip, 2,800-3,200 rpm Stall Speed Range, 30-spline, 9.600 in. Diameter, Chevy THM400, Buick, Chevy, Each

Part Number: HAY-97-1D28Q

Not Yet Reviewed

Estimated Ship Date: Mar 9, 2026 if ordered today

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Estimated Ship Date: Mar 9, 2026 if ordered today

Hays Twister Full Race 2,400-2,800 Stall Torque Converter 97-1D24F

Torque Converters, Twister Full Race, 2,400-2,800 rpm Stall Speed Range, 30-spline, 9.600 in. Diameter, Chevrolet THM400, Buick, Chevy, Jeep, Each

Part Number: HAY-97-1D24F

Not Yet Reviewed

Estimated Ship Date: Mar 9, 2026 if ordered today

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Estimated Ship Date: Mar 9, 2026 if ordered today

Hays Twister Full Race 4,200-4,500 Stall Torque Converter 97-1D42F

Torque Converters, Twister Full Race, 4,200-4,500 rpm Stall Speed Range, 30-spline, 9.600 in. Diameter, Chevrolet THM400, Buick, Chevy, Jeep, Each

Part Number: HAY-97-1D42F

Not Yet Reviewed

Estimated Ship Date: Mar 9, 2026 if ordered today

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Estimated Ship Date: Mar 9, 2026 if ordered today

Hays Twister Full Race 2,800-3,200 Stall Torque Converter 97-1D28F

Torque Converters, Twister Full Race, 2,800-3,200 rpm Stall Speed Range, 30-spline, 9.600 in. Diameter, Chevrolet THM400, Buick, Chevy, Jeep, Each

Part Number: HAY-97-1D28F

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Mar 9, 2026 if ordered today

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Estimated Ship Date: Mar 9, 2026 if ordered today

Hays Twister Full Race 3,600-4,200 Stall Torque Converter 97-1D36F

Torque Converters, Twister Full Race, 3,600-4,200 rpm Stall Speed Range, 30-spline, 9.600 in. Diameter, Chevrolet THM400, Buick, Chevy, Jeep, Each

Part Number: HAY-97-1D36F

Not Yet Reviewed

Estimated Ship Date: Mar 9, 2026 if ordered today

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Estimated Ship Date: Mar 9, 2026 if ordered today

Hays Twister Full Race 3,200-3,600 Stall Torque Converter 97-1D32F

Torque Converters, Twister Full Race, 3,200-3,600 rpm Stall Speed Range, 30-spline, 9.600 in. Diameter, Chevrolet THM400, Buick, Chevy, Jeep, Each

Part Number: HAY-97-1D32F

Not Yet Reviewed

Estimated Ship Date: Mar 9, 2026 if ordered today

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Estimated Ship Date: Mar 9, 2026 if ordered today

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