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About:
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12 valve cummins transmission - The older automatic transmission dating from 1989 to 2002 when the 47 RH then the 48-RE transmissions were introduced were designed after the 727 Torqueflight Chrysler transmission and were never suited for the diesel market. The 47- RH and the 48-RE continued to use very old technology that has been passed on for many years. Utilizing bands, hydraulic throttle valves and governor pressure to control shift timing, the 48-RE transmission will never be a smooth shifting transmission or have the consistency of the newer designed transmissions.
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