Thread: which trasmission valve body is recommeded?
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Old Mon, August 23rd, 2010, 11:13 AM
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The valve body upgrade is simply to allow crisper, more positive shifting. It doesn't address any weaknesses inherent to the 4R100 transmission.....meaning it doesn't make the transmission any stronger. It simply allows a mechanical way of making the shifts occur more quickly without slightly increasing transmission line pressure electronically during the shifts.

If it wasn't clear (I have a habit of oversimplifying stuff sometimes) the valve body alone will not cause harsh upshifts. The valve body will cause neck-snapping shifts when combined with aftermarket tuning that increases transmission pressure during shifts......in which case we would leave the stock transmission tuning in place if you have a valve body upgrade.
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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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