A common goal with GM 4L60-series transmissions is to increase pump volume or output, but a common problem is fluctuating pressure in Reverse. Sonnax pump spring spacer 77917-RV will preload the spring to increase pump output and stabilize the pressure.
Symptoms:
Cause:
Weak pump slide spring.Correction:
Increase pump output and stabilize line pressure by installing Sonnax pump spring spacer.You must login to post a review.
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