Sonnax 77763-01 boost springs offer a low cost, direct replacement alternative to the OE springs in GM 4L60, 4L60-E, 4L65-E and 4L70-E units. Engineered for the application, the 77763-01 boost springs are precision manufactured from high quality spring materials.

Low-cost direct replacement
Precision manufactured
Made from high-quality spring material
Sonnax 77763-01 boost springs offer a low cost, direct replacement alternative to the OE springs in GM 4L60, 4L60-E, 4L65-E and 4L70-E units. Engineered for the application, the 77763-01 boost springs are precision manufactured from high quality spring materials.

Low-cost direct replacement
Precision manufactured
Made from high-quality spring material