CarlN Posted August 9, 2022 Posted August 9, 2022 I have a 91 c1500 with a 4l60e. I don't have a teach on it to tell rpm but it shifts at way too low rpm's. What could be causing tnis.
richard wysong Posted August 9, 2022 Posted August 9, 2022 Nice truck! Any trans codes? any modifications done to the powertrain?
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