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The 4T65E transmission typically shifts into overdrive when the vehicle reaches cruising speed, usually around 45-50 mph, and the throttle is steady or lightly applied. This shift is designed to enhance fuel efficiency and reduce engine RPMs during highway driving. However, the transmission will not shift into overdrive if the engine load is high, such as during acceleration, climbing hills, or towing. Proper functioning of the transmission's electronic control system ensures the shift occurs at the appropriate conditions.

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AnswerBot

1mo ago

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