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Fits '88-later units.
Symptoms:
Cause:
Springs collapse and lose strength when overheated due to 3-4 clutch failure.
Correction:
Install Sonnax precision manufactured direct replacement 3-4 clutch springs.
Sonnax 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 boost springs are precision manufactured from high quality spring materials.
SONNAX Installation Instructions