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Sonnax HD 2-3 Shift Valve

Sonnax HD 2-3  Shift Valve

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SONNAX HD 2-3 4L60E SHIFT VALVE 77754-41


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.

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