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Vehicle Info NeededSONNAXPART NUMBER: 852-77754-41
Heavy Duty 2-3 Shift Valve 4L60-E
$4323
Ships on 09/08/2026
Lowest Price GuaranteeGM
Heavy Duty 2-3 Shift Valve4L60-E
Sonnax has developed a drop-in replacement 2-3 shift valve that applies the overrun clutch in D3, 1st, 2nd and 3rd gears where the factory valve applies the overrun clutch only in D3, 3rd gear.
Applying the overrun clutch in 1st and 2nd provides added durability to the input sprag and forward clutch in heavy duty vehicles, plow trucks and high performance applications.
In addition, this upgrade works well with applications using aftermarket electronic paddle shifters. With the overrun clutch on, the Sonnax valve allows full downshift engine braking in 2nd, while the shifter remains in the D3 position.
Sonnax has developed a drop-in replacement 2-3 shift valve that applies the overrun clutch in D3, 1st, 2nd and 3rd gears where the factory valve applies the overrun clutch only in D3, 3rd gear.
Applying the overrun clutch in 1st and 2nd provides added durability to the input sprag and forward clutch in heavy duty vehicles, plow trucks and high performance applications.
In addition, this upgrade works well with applications using aftermarket electronic paddle shifters. With the overrun clutch on, the Sonnax valve allows full downshift engine braking in 2nd, while the shifter remains in the D3 position.
- No special tools required
- Extends life of the forward clutch and input sprag
- Ideal for electrically downshifted units with aftermarket paddle shifters
Heavy-Duty Transmission Shift Valves
Sonnax Zip Kits address common shift-related issues and include specially-engineered pieces to reduce shift pressure loss within the transmission. They help to eliminate unnecessary wear and are ideal for heavy-duty and high-performance applications.
Part TypeAutomatic Transmission Valve Body Control Valve
Product LineSonnax Zip Kits and Components
BrandSONNAX
Package Height0.5
Package Width4.2
Package Length5.8
Weight0.04 PG
Part CategoryReplacement Parts
Part FitmentSemi Universal
Vendor Part Number77754-41
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
