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Performance & Replacement Transmission & Drivetrain Parts
Building awesome horsepower is only part of the story. You need to deliver all that power to your car or truck’s wheels! We’ve got torque-hungry high performance automatic...
Building awesome horsepower is only part of the story. You need to deliver all that power to your car or truck’s wheels! We’ve got torque-hungry high performance automatic and manual transmissions for street and strip applications, torque converters and clutch sets, flexplates and flywheels, plus limited-slip differentials, spools, lockers, ring and pinion sets, driveshafts, U-joints, axles, bearings, C-clip eliminator kits, transfer cases, shift kits, and rebuild kits. We also have a wide selection of trans-brakes, shifters, cables, and accessories—everything you need to put the power to the ground, Summit style.
Building awesome horsepower is only part of the story. You need to deliver all that power to your car or truck’s wheels! We’ve got torque-hungry high performance automatic and manual transmissions for street and strip applications, torque converters and clutch sets, flexplates and flywheels, plus limited-slip differentials, spools, lockers, ring and pinion sets, driveshafts, U-joints, axles, bearings, C-clip eliminator kits, transfer cases, shift kits, and rebuild kits. We also have a wide selection of trans-brakes, shifters, cables, and accessories—everything you need to put the power to the ground, Summit style.
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Torque Converters, SST Series, 9 in. Diameter, Aluminum Stator, Diode, Turbo Spline, 4,200-4,600 Stall, THM400, THM350, Each
Part Number: FTI-SST89-8
Not Yet Reviewed
Estimated Ship Date: May 11, 2026 if ordered today
Estimated Ship Date: May 11, 2026 if ordered today
GM TH350-400-XHD 3300-3700 RPMS-WITH MECHANICAL DIODE SPRAG
Part Number: TOS-10000MSXHD
Not Yet Reviewed
Estimated Ship Date: Jun 9, 2026 if ordered today
Estimated Ship Date: Jun 9, 2026 if ordered today
GM 700R4 BIG SHOT 10-LOCKUP LS-2,900-3300 RPMS-WITH MECHANICAL DIODE SPRAG
Part Number: TOS-10050LS
Not Yet Reviewed
Estimated Ship Date: Jun 9, 2026 if ordered today
Estimated Ship Date: Jun 9, 2026 if ordered today
10" GM EXTRA LS XHD-XHD 2500-2900 RPMS-WITH MECHANICAL DIODE SPRAG
Part Number: TOS-10000XLSXHD
Not Yet Reviewed
Estimated Ship Date: Jun 17, 2026 if ordered today
Estimated Ship Date: Jun 17, 2026 if ordered today
GM T-350-400 BIG SHOT 10 LS-XHD 2900-3300 RPMS-WITH MECHANICAL DIODE SPRAG
Part Number: TOS-10000LSXHD
Not Yet Reviewed
Estimated Ship Date: Jun 9, 2026 if ordered today
Estimated Ship Date: Jun 9, 2026 if ordered today
Torque Converters, SST Series, 9 in. Diameter, Aluminum Stator, Diode, Turbo Spline, Custom, THM400, THM350, Each
Part Number: FTI-SST89-6T
Not Yet Reviewed
Estimated Ship Date: May 11, 2026 if ordered today
Estimated Ship Date: May 11, 2026 if ordered today
FORD C-6 BIG SHOT 10 HS XHD-1.375 PILOT-3700-4100 RPMS-WITH MECHANICAL DIODE SPRAG
Part Number: TOS-10200HSXHD
Not Yet Reviewed
Estimated Ship Date: Jun 9, 2026 if ordered today
Estimated Ship Date: Jun 9, 2026 if ordered today
Torque Converters, SST Series, 9 in. Diameter, Aluminum Stator, Diode, Turbo Spline, 3,400-3,800 Stall, THM400, THM350, Each
Part Number: FTI-SST89-0
Not Yet Reviewed
Estimated Ship Date: May 11, 2026 if ordered today
Estimated Ship Date: May 11, 2026 if ordered today
Torque Converters, SST Series, 9 in. Diameter, Aluminum Stator, Diode, Turbo Spline, Custom, THM400, THM350, Each
Part Number: FTI-SST89-0T
Not Yet Reviewed
Estimated Ship Date: May 11, 2026 if ordered today
Estimated Ship Date: May 11, 2026 if ordered today
Torque Converters, SST Series, 9 in. Diameter, Aluminum Stator, Diode, Turbo Spline, Custom, THM400, THM350, Each
Part Number: FTI-SST89-7
Not Yet Reviewed
Estimated Ship Date: May 11, 2026 if ordered today
Estimated Ship Date: May 11, 2026 if ordered today
MECHANICAL DIODE
Part Number: SOX-GM-MD-3
Not Yet Reviewed
Estimated Ship Date: May 11, 2026 if ordered today
Estimated Ship Date: May 11, 2026 if ordered today
MECHANICAL DIODE
Part Number: SOX-GM-MD-10S
Not Yet Reviewed
Estimated Ship Date: May 11, 2026 if ordered today
Estimated Ship Date: May 11, 2026 if ordered today
9" STREET/STRIP-HEAVY DUTY SPRAG-GM-WITH MECHANICAL DIODE SPRAG
Part Number: TOS-900XHDMS
Not Yet Reviewed
Estimated Ship Date: Jun 9, 2026 if ordered today
Estimated Ship Date: Jun 9, 2026 if ordered today
FORD C4 1970-UP 11 7/16 BC-BIG SHOT 10 LS XHD-2900-3300 RPMS-WITH MECHANICAL DIODE SPRAG
Part Number: TOS-10102LSXHD
Not Yet Reviewed
Estimated Ship Date: Jun 9, 2026 if ordered today
Estimated Ship Date: Jun 9, 2026 if ordered today
GM 4L60E LS1-LOCKUP-3700-4100-WITH MECHANICAL DIODE SPRAG
Part Number: TOS-10052HS
Not Yet Reviewed
Estimated Ship Date: Jun 9, 2026 if ordered today
Estimated Ship Date: Jun 9, 2026 if ordered today
Automatic Transmission, 500 hp/450 ft. lbs. Max, Level 3, 4R70W, RWD, 2,600 - 3,200 Stall, 2 Bolt Starter, Small Block Ford, Kit
Part Number: GES-GS4R702L3
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Automatic Transmission, Up to 500 hp/450 ft. lbs. Max, Level 3, 4R70W, 4WD, 2,600 - 3,200 Stall, 2 Bolt Starter, Small Block Ford, Kit
Part Number: GES-GS4R7024X4L3
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Automatic Transmission Package, TH400 level 4, Dipstick & Tube, Cooler Lines, Cooler, FTI ATF Fluid, SST89-0 Racing Billet Stall Converter, Kit
Part Number: FTI-TH400-4K21
Estimated Ship Date: Today
Estimated Ship Date: Today
Automatic Transmission, TH400 Level 4, Remanufactured, 3 Gears, Deep Pan, Torque Converter, Chevrolet, THM400, Kit
Part Number: FTI-TH400-4K51
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Torque Converter, Street Master, 2,500 rpm Stall, Chevy, TH350, TH400, Each
Part Number: HUP-GM25HDX
Not Yet Reviewed
Estimated Ship Date: May 7, 2026 if ordered today
Estimated Ship Date: May 7, 2026 if ordered today
Need It Sooner? We recommend these similar substitute parts:
Hughes Performance Street Master 2,500 Stall Torque Converter GM25
Estimated Ship Date: Today
Torque Converter, 3,000 rpm Stall, 4L80E, 4L85E, 35-Spline, Trans-Break, Each
Part Number: HUP-2535MDLMHDBB
Not Yet Reviewed
Estimated Ship Date: May 7, 2026 if ordered today
Estimated Ship Date: May 7, 2026 if ordered today
