Sonnax 77754-41 Transmission Shift Valve, 2-3 (Heavy Duty) 4L60E4L65E 4L70E4L60-E, 4L65-E, 4L70-E Heavy Duty 2-3 Shift ValveSonnax Part No. 77754-41When the GM 4L60-E family of transmissions evolved from the 700-R4, the overrun clutch is no longer applied in 1st and 2nd when accelerating from a stop in D3 shifter position. This change was made to improve coastdown drivability in D3 but had the side effect of reducing the torque capacity of the input section.For greatly improved input sprag and Forward clutch durability, Sonnax heavy duty 2-3 shift valve 77754-41 for 4L60-E, 4L65-E and 4L70-E units will apply the overrun clutch in D3 1st, 2nd and 3rd Gears.
- Improves input sprag and Forward clutch durability
- Critical upgrade for all heavy-duty and performance vehicles
- Easy to install
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- Normal wear and tear
- Improper installation or incorrect application
- Misuse, abuse, neglect, accidents, or modifications
- Damage from overheating, contamination, improper lubrication, or lack of maintenance
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Professional installation is required. Failure to follow manufacturer and industry-standard installation procedures will void this warranty is limited to the product only and does not cover related components or vehicle damage. Maximum liability shall not exceed the original purchase price.30-day return policy for unused, uninstalled items. Any product you return must be in the same condition you received it and in the original packaging.
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- Improves input sprag and Forward clutch durability
- Critical upgrade for all heavy-duty and performance vehicles
- Easy to install
4L60-E, 4L65-E, 4L70-E Heavy Duty 2-3 Shift ValveSonnax Part No. 77754-41When the GM 4L60-E family of transmissions evolved from the 700-R4, the overrun clutch is no longer applied in 1st and 2nd when accelerating from a stop in D3 shifter position. This change was made to improve coastdown drivability in D3 but had the side effect of reducing the torque capacity of the input section.For greatly improved input sprag and Forward clutch durability, Sonnax heavy duty 2-3 shift valve 77754-41 for 4L60-E, 4L65-E and 4L70-E units will apply the overrun clutch in D3 1st, 2nd and 3rd Gears.
- Improves input sprag and Forward clutch durability
- Critical upgrade for all heavy-duty and performance vehicles
- Easy to install
