Sonnax Transmission Company Transmissions

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 12/8/2025

• Free Shipping
• $10 Summit Bucks

Automatic Transmission Rebuild Components, Reaction Shaft, GM, 4L60, 4L60E, 4L65E, 4L70E, Kit

Part Number: SOX-74602-01K

5.0 out of 5 stars ( 5 )

Estimated Ship Date: Monday 12/8/2025

• Free Shipping
• $10 Summit Bucks

Servo, Super-Hold, 2nd Gear, Billet Aluminum, GM, 4L60, 4L60E, 4L65E, 4L70E, Kit

Part Number: SOX-77911-03K

5.0 out of 5 stars ( 9 )

Estimated Ship Date: Monday 12/8/2025

• 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 12/8/2025

• Free Shipping
• $10 Summit Bucks

Governor, TH350, TH350C, Each

Part Number: SOX-350

4.14 out of 5 stars ( 7 )

Estimated Ship Date: Monday 12/8/2025

• Free Shipping
• $10 Summit Bucks

Automatic Transmission Shift Kits, Zip Kit, with Boost Valve, O-Ring Plugs, Accumulator Pistons, Spring, Sleeves, Ford, 6R140, Kit

Part Number: SOX-6R140-ZIP

Not Yet Reviewed

Estimated Ship Date: Monday 12/8/2025

• Free Shipping
• $10 Summit Bucks

SERVO 200-4R HI PERF

Part Number: SOX-K65703-1

Not Yet Reviewed

Estimated Ship Date: Monday 12/8/2025

• Free Shipping
• $10 Summit Bucks

Shift Improver Performance Pack, 4R100, Ford, Kit

Part Number: SOX-HP-4R100-01

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 12/8/2025

• Free Shipping
• $10 Summit Bucks

Automatic Transmission Shift Kits, Zip Kit, with End Plugs, O-Rings, Solenoid Modulator, Boost/Accumulator/Lockup Control Valves, Lexus, Toyota, Kit

Part Number: SOX-S0001

Not Yet Reviewed

Estimated Ship Date: Monday 12/8/2025

• Free Shipping
• $10 Summit Bucks

Shift Kit, Zip Kit, ZF6HP-21, ZF6HP-28, ZF6HP-34, Kit

Part Number: SOX-ZF6-GEN2-ZIP

Not Yet Reviewed

Estimated Ship Date: Monday 12/8/2025

• Free Shipping
• $10 Summit Bucks

Servo, Super-Hold, 4th Gear, Billet Aluminum, Ford, AOD, Kit

Part Number: SOX-76890-17KP

4.6 out of 5 stars ( 5 )

Estimated Ship Date: Monday 12/8/2025

• Free Shipping
• $10 Summit Bucks

Shift Kit, Zip Kit, 6R80, 6R100, Kit

Part Number: SOX-6R80L6R100ZI

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 12/8/2025

• Free Shipping
• $10 Summit Bucks

FORWARD SUN GEAR

Part Number: SOX-76612A-01

Not Yet Reviewed

Estimated Ship Date: Monday 12/8/2025

• Free Shipping
• $10 Summit Bucks

Automatic Transmission Rebuild Components, Planetary Gear Stabilizer, GM, Powerglide, Kit

Part Number: SOX-28510-S3

Not Yet Reviewed

Estimated Ship Date: Monday 12/8/2025

• Free Shipping
• $10 Summit Bucks

FRIC KIT, REV, INCREASED RADIUS POWERGLIDE 1.58 SERVICE PART

Part Number: SOX-28131-FRK

Not Yet Reviewed

Estimated Ship Date: Monday 12/8/2025

• Free Shipping
• $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 12/8/2025

• $10 Summit Bucks

SURE CURE KIT

Part Number: SOX-46-47RHE-ZIP

Not Yet Reviewed

Estimated Ship Date: Monday 12/8/2025

• Free Shipping
• $10 Summit Bucks

Automatic Transmission Shift Kits, Shift Improver, E4OD, 4R100, Sold as a Kit

Part Number: SOX-E4OD4R100ZIP

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 12/8/2025

• Free Shipping
• $10 Summit Bucks

Automatic Transmission Rebuild Components, Planetary Gear Stabilizer, GM, Powerglide, Kit

Part Number: SOX-28510-S2

Not Yet Reviewed

Estimated Ship Date: Monday 12/8/2025

• Free Shipping
• $10 Summit Bucks

BAND EXTRA WIDE RED

Part Number: SOX-S019961

Not Yet Reviewed

Estimated Ship Date: Monday 12/8/2025

• Free Shipping
• $10 Summit Bucks

SERVO COVER KIT SUPPORTED PIN

Part Number: SOX-28821-19K

Not Yet Reviewed

Estimated Ship Date: Monday 12/8/2025

• Free Shipping
• $10 Summit Bucks

VALVE ASSY BOOST

Part Number: SOX-35754-01K

Not Yet Reviewed

Estimated Ship Date: Jan 6, 2026 if ordered today

• Drop Ship
• $10 Summit Bucks
• Special Order

REAMER SELF GUIDING SERVO TOOL

Part Number: SOX-77787-RM3

Not Yet Reviewed

Estimated Ship Date: Jan 6, 2026 if ordered today

• Drop Ship
• Free Shipping
• $10 Summit Bucks
• Special Order