Automatic transmission upgrades to improve the shifting and
longevity of the 7.3 Powerstroke automatic 4R100 transmission.
The 4R100 was a good transmission for the factory performance of
the 7.3 Powerstroke but, after power modifications the
transmission begins to show it weakness. If you the your 7.3 to
its potential then you must address the soft factory shifting and
torque converter lock up or risk premature failure for a very
expensive repair. To handle mild to moderate horsepower a good
7.3 torque converter and upgraded valve body upgrade is just what
the 4R100 needs.