Automatic Transmission Shift Kits

Instead of replacing your automatic transmission’s whole valve body, you can get better performance out of your stock valve body with a transmission shift kit....

Instead of replacing your automatic transmission’s whole valve body, you can get better performance out of your stock valve body with a transmission shift kit. Different manufacturers use different components and techniques, but they all modify the way transmission fluid is routed through the valve body. Some kits are made for racing and performance driving, while others are for towing and heavy-duty hauling. Whatever your application demands, Summit Racing Equipment has the shift kit you need.

Top Brands

When it comes to the complexities of your automatic valve body, you want a manufacturer you can trust. Summit...

Top Brands

When it comes to the complexities of your automatic valve body, you want a manufacturer you can trust. Summit only carries transmission shift kits from top name brands, including TransGo, TCI Auto, B&M, Sonnax, and Performance Automatic.

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Results 1 - 25 of 93

TransGo Performance Shift Kits 400-PRO

Shift Kit, Performance, Gaskets, Pro-Race, Heavy Duty, Super Show Off, Buick, Cadillac, Chevy, GMC, Oldsmobile, Pontiac, TH400, Kit

Part Number: TRG-400-PRO

4.95 out of 5 stars ( 21 )

Estimated Ship Date: Tomorrow

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TransGo Performance Shift Kits 340-HD2

Automatic Transmission Shift Kit, Gaskets, Jeep, Toyota, Kit

Part Number: TRG-340-HD2

5.0 out of 5 stars ( 12 )

Estimated Ship Date: Tomorrow

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ATP Automatic Transmission Shift Improver Kits SK-1

Shift Kit, Filter, Gaskets, for TH350 or TH350C, Buick, Cadillac, Chevy, GMC, Oldsmobile, Pontiac, Kit

Part Number: ATP-SK1

Not Yet Reviewed

Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

TCI Valve Body Performance Improver Transmission Upgrade Kits 226000

TCI Valve Body Performance Improver Transmission Upgrade Kits 226000

Transmission Upgrade Kit, Valve Body Performance Improver, GM, TH400, Kit

Part Number: TCI-226000

Not Yet Reviewed

Estimated Ship Date: Feb 12, 2026 if ordered today

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Estimated Ship Date: Feb 12, 2026 if ordered today

Need It Sooner? We recommend these similar substitute parts:

B&M Shift Improver Kits 20260

4.75 out of 5 stars ( 16 )

Estimated Ship Date: Tomorrow

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TCI Valve Body Performance Improver Transmission Upgrade Kits 122500

Transmission Upgrade Kit, Shift Improver, Chrysler, Dodge, Plymouth, Torqueflite 727, Each

Part Number: TCI-122500

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

TCI Valve Body Performance Improver Transmission Upgrade Kits 122600

Transmission Upgrade Kit, AMC, Chrysler, A-904, Each

Part Number: TCI-122600

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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TCI Valve Body Performance Improver Transmission Upgrade Kits 326200

Transmission Upgrade Kit, Trans-Scat, Chevy, Buick, Oldsmobile, Pontiac, GMC, TH350, Each

Part Number: TCI-326200

Not Yet Reviewed

Estimated Ship Date: Feb 12, 2026 if ordered today

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Estimated Ship Date: Feb 12, 2026 if ordered today

Need It Sooner? We recommend these similar substitute parts:

TransGo Performance Shift Kits 350-1&2

4.5 out of 5 stars ( 56 )

Estimated Ship Date: Tomorrow

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TCI Valve Body Performance Improver Transmission Upgrade Kits 526200

Transmission Upgrade Kit, Performance Improver, Ford, Lincoln, Mercury, C-4, 1970-83, Kit

Part Number: TCI-526200

Not Yet Reviewed

Estimated Ship Date: Feb 11, 2026 if ordered today

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Estimated Ship Date: Feb 11, 2026 if ordered today

Need It Sooner? We recommend these similar substitute parts:

B&M Shift Improver Kits 50262

2.25 out of 5 stars ( 6 )

Estimated Ship Date: Tomorrow

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TCI Valve Body Performance Improver Transmission Upgrade Kits 526100

Transmission Upgrade Kit, Performance Improver, Ford, Lincoln, Mercury, C-4, Kit

Part Number: TCI-526100

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Feb 11, 2026 if ordered today

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Estimated Ship Date: Feb 11, 2026 if ordered today

TCI Valve Body Performance Improver Transmission Upgrade Kits 376500

Transmission Upgrade Kit, Performance Improver, Chevy, 700R4, Kit

Part Number: TCI-376500

2.0 out of 5 stars ( 3 )

Estimated Ship Date: Feb 11, 2026 if ordered today

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Estimated Ship Date: Feb 11, 2026 if ordered today

TCI Valve Body Performance Improver Transmission Upgrade Kits 326300

Transmission Upgrade Kit, Trans-Scat, Chevy, Buick, Oldsmobile, Pontiac, GMC, TH250C, TH350C, Each

Part Number: TCI-326300

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Feb 10, 2026 if ordered today

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Estimated Ship Date: Feb 10, 2026 if ordered today

TCI Valve Body Performance Improver Transmission Upgrade Kits 496500

Transmission Upgrade Kit, Performance Improver, Ford, E4OD, 4R100, Kit

Part Number: TCI-496500

Not Yet Reviewed

Estimated Ship Date: Feb 10, 2026 if ordered today

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Estimated Ship Date: Feb 10, 2026 if ordered today

TransGo Performance Shift Kits 4L80E-HD2

Shift Kit, Automatic Type, GM, 4L80E, 4L85E, Forward/Standard Shift Pattern, Each

Part Number: TRG-4L80E-HD2

4.63 out of 5 stars ( 56 )

Estimated Ship Date: Tomorrow

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TransGo Performance Shift Kits 4L60EHD2

Shift Kit, Automatic Type, Includes .500 in. Boost Valve, GM, 4L60E, Each

Part Number: TRG-4L60E-HD2

4.75 out of 5 stars ( 59 )

Estimated Ship Date: Tomorrow

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TransGo Automatic Transmission Reprogramming Kits 6L80-TOW&PRO

Automatic Transmission Shift Kits, Reprogramming Kit, Performance/Tow/Haul, GM, 6L45, 6L50, 6L80, 6L90, Kit

Part Number: TRG-6L80-TOW-PRO

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow

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TransGo Performance Shift Kits 400-1&2

Shift Kit, Performance, Buick, Chevy, Oldsmobile, Pontiac, GMC, TH400, 1965-95, Kit

Part Number: TRG-400-1-2

4.76 out of 5 stars ( 21 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

TransGo Performance Shift Kits 350-1&2

Shift Kit, Performance, Buick, Chevy, Oldsmobile, Pontiac, GMC, TH350, 1969-81, Kit

Part Number: TRG-350-1-2

4.41 out of 5 stars ( 56 )

Estimated Ship Date: Tomorrow

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TransGo Performance Shift Kits 4L60E-3

Shift Kit, Stick Type, GM, 4L60E 1993-2005, Competition, Off-Road, Pro-Street, Each

Part Number: TRG-4L60E-3

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow

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B&M Shift Improver Kits 20260

Transmission Upgrade Kit, Shift Improver, GM, TH400, TH375, M40, Each

Part Number: BMM-20260

4.81 out of 5 stars ( 16 )

Estimated Ship Date: Tomorrow

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TransGo Performance Shift Kits TF-2

Shift Kit, Automatic Type, Chrysler, Torqueflite, 3 Speed, Full Race Shifts, Each

Part Number: TRG-TF-2

4.77 out of 5 stars ( 26 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

B&M Shift Improver Kits 30262

Shift Improver, Chevy, TH350, Each

Part Number: BMM-30262

4.72 out of 5 stars ( 25 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

TransGo Performance Shift Kits AODE-HD2

Shift Kit, Automatic Type, Ford, AODE, 4R70W, Towing, Competition, Heavy Duty, Pro-Street, Each

Part Number: TRG-AODE-HD2

4.73 out of 5 stars ( 22 )

Estimated Ship Date: Tomorrow

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TransGo Performance Shift Kits 700-2&3

Shift Kit, Automatic, Full Manual, GM, 700R4, Towing, Competition, Pro Sreet, Each

Part Number: TRG-700-2-3

4.32 out of 5 stars ( 25 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

TransGo Performance Shift Kits 4L80E-3

Shift Kit, Stick Type, Full Manual, GM, 4L80E, Competition, Off-Road, Pro-Street, Each

Part Number: TRG-4L80E-3

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

B&M Transpak Kits 30228

Transmission Upgrade Kit, Transpak, GM, TH350, TH375B, M38, Each

Part Number: BMM-30228

4.9 out of 5 stars ( 10 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

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