GMC Sonnax Transmission Company Parts and Accessories

Shift Improver Performance Pack, 4L60E, 4L65E, 4L70E, Buick, Chevy, GMC, Oldsmobile, Pontiac, Kit

Part Number: SOX-HP-4L60E-01

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Monday 12/15/2025

• Free Shipping
• $10 Summit Bucks

Automatic Transmission Shift Kits, TCC Zip Kit, with O-Ring End Plugs, Converter Limit Valve, Regulator/Shuttle, Cadillac, Chevy, GMC, 8L45, 8L90, Kit

Part Number: SOX-8L458L90TCCZ

Not Yet Reviewed

Estimated Ship Date: Monday 12/15/2025

• Free Shipping
• $10 Summit Bucks

Automatic Transmission Rebuild Components, Governor, Blue Gear, GM, 4L60, Gasoline Engines, Each

Part Number: SOX-730

5.0 out of 5 stars ( 7 )

Estimated Ship Date: Monday 12/15/2025

• Free Shipping
• $10 Summit Bucks

Automatic Transmission Shift Kits, Shift Zip Kit, with Clutch Valves, Accumulator Pistons, Spring, Sleeves, Cadillac, Chevy, GMC, 8L45, 8L90, Kit

Part Number: SOX-8L458L90SHIF

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 12/15/2025

• Free Shipping
• $10 Summit Bucks

Automatic Transmission Signal Accumulator Pistons, Aluminum, Chevy, GMC, Cadillac, Kit

Part Number: SOX-154740-06K

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 12/15/2025

• $10 Summit Bucks

Automatic Transmission Brackets and Levers, Shifter Shaft, Includes Seal, GM, TH350/TH350C, Each

Part Number: SOX-35801-02K

4.92 out of 5 stars ( 12 )

Estimated Ship Date: Monday 12/15/2025

• $10 Summit Bucks

Automatic Transmission Rebuild Components, Bearing/Race Kit, Sun/Internal, Center Support/Sun, GM, TH400/4L80-E/4L85-E, Kit

Part Number: SOX-SBK-G10

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 12/15/2025

• $10 Summit Bucks

Automatic Transmission Accumulator Pistons, Pinless, Aluminum, Buick, Chevy, GMC, Oldsmobile, Pontiac, Each

Part Number: SOX-77998-03K

5.0 out of 5 stars ( 15 )

Estimated Ship Date: Monday 12/15/2025

• $10 Summit Bucks

GOVERNOR

Part Number: SOX-731

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 12/15/2025

• Free Shipping
• $10 Summit Bucks

Automatic Transmission Carrier Thrust Washers, 2.749 in. O.D., 0.106 in. Thickness, 2.082 in. I.D., Ford, GM, Each

Part Number: SOX-56241

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 12/15/2025

• $10 Summit Bucks

Automatic Transmission Valve Bodies, Remanufactured, Valve Body, Cast Aluminum, Standard Shift Pattern, Chevy, GMC, 6T70, 6T75, 6T80, Each

Part Number: SOX-GM6T70-2

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 12/15/2025

• Core Charge $100.00
• Free Shipping
• $10 Summit Bucks

Automatic Transmission Accumulator Pistons, Pinless, Aluminum, Buick, Cadillac, Chevy, GMC, Hummer, Isuzu, Oldsmobile, Pontiac, Saab, Each

Part Number: SOX-77987-01K

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 12/15/2025

• $10 Summit Bucks

Automatic Transmission Bracket and Lever, Shift Cable Mounting Bracket, Steel, Black, 4L60-E/4L80-E, Chevrolet, GMC, Each

Part Number: SOX-34913-01

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 12/15/2025

• $10 Summit Bucks

Automatic Transmission Rebuild Kits, Sure Cure Kit, with O-Ring Plug Ends, Boost Valve, Bushings, Springs, Cadillac, Chevy, GMC, 4L80-E, 4L85-E, Kit

Part Number: SOX-SC4L80E

4.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 12/15/2025

• $10 Summit Bucks

ACCUMULATOR PISTON KIT

Part Number: SOX-154740-15K

Not Yet Reviewed

Estimated Ship Date: Monday 12/15/2025

• $10 Summit Bucks

Accumulator Piston, Aluminum, Forward, GM, 4L60E, 4L65E, 4L70E, Each

Part Number: SOX-74927-AP

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 12/15/2025

• $10 Summit Bucks

Automatic Transmission Rebuild Components, Pressure Regulator Spring, High Performance, GM, 4L60-E/4L65-E/4L70-E, Each

Part Number: SOX-77917-10

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 12/15/2025

• $10 Summit Bucks

O-RINGED END PLUG KIT

Part Number: SOX-34200-05K

Not Yet Reviewed

Estimated Ship Date: Monday 12/15/2025

• $10 Summit Bucks

SLEEVE KIT

Part Number: SOX-77754-ISO

Not Yet Reviewed

Estimated Ship Date: Monday 12/15/2025

• $10 Summit Bucks