Why does my Dodge Cummins Diesel shift so early at light throttle?
Early minimum throttle up shifts are a common complaint on 1996-98 47RE transmissions. The factory minimum throttle 1-2 up shift occurs at approx 4 mph and the 2-3 at 9 mph. Preferred 1-2 should occur @ 8-10 mph and the 2-3 @ 15-17 mph, at minimum throttle. New TRANSBUDDY shift springs allow the minimum throttle 1-2 and 2-3 shift to be calibrated to the correct mph. Only install shift springs if up shifts are too early during initial road test. Note: Some late 1999 and most 2000 and later models shift on time and do not need new shift springs. Do not install shift springs on 1994-95 47RH unless necessary. Early 47RE models 96-98 governor curves vary from vehicle to vehicle so there is no set rule on minimum throttle up shifts. This requires an initial road test. Page 6 of main instruction sheet lists mph values on both the new inner and new outer 2-3 shift springs for calibrating the shift timing. If a 47RE shifts early even with the new TRANSBUDDY shift springs, (mostly 96-98 models)
