Thread: Trans hard shift question
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Old Mon, January 18th, 2010, 11:05 AM
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I won't downplay anybody's specific tuning but yes, it is normal. The reasoning behind the very firm shifts is the reduction of "burn time" that the friction material on the clutches have to endure under higher than stock power levels.

If there is no compensation for the added power and accelerator pedal position (one of the PCM's load calculations), then the shifts will drag out for a long time and actually do more harm to the transmission.

The harshness can be tuned out but there's a trade-off.
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Tuning, PCM flashing, and burning chips for 7.3s since 2008. Repairing all aspects of 7.3L Powerstrokes for 25 years.
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