Is there a break in process for a rebuilt tranny or take time to run smootly?
My car has 68000 miles.
Hello - modern automatic transmissions do have a "learn" process, which results in smoother shifting over a period of acceleration cycles. But, I would expect shifting to become pretty smooth within a week or so. If this is not the case, I would have a conversation with your transmission supplier or technician to make sure there isn’t a problem. There may also be a re-learn synchronization process between the throttle position sensor and the transmission controller. Similarly, this should be a relatively short period of time.
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