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Call or Text (352) 722-529547RE repair and build parts for the 1998.5-2002 Ram 5.9L Cummins
The 47RE pairs an electronically controlled governor pressure circuit with a hydraulic valve body and a lock-up torque converter. That split explains most of what is on this page. The electronic side, meaning the governor pressure solenoid and transducer plus the output-shaft speed sensor, causes shift faults like no 1-2 upshift, stuck in first or limp mode. On the hydraulic and mechanical side, slipping, delayed shifts and converter failures show up when the truck tows hard or makes more than stock power, because the transmission is rated for only about 450 lb-ft of input.
Lock/unlock and how to fix it
If the rpm hunts at a steady 35-50 mph in third or overdrive, the converter clutch is cycling. On these trucks the usual cause is electrical noise on the APPS signal wire, which runs in the same loom as the alternator charge wire, or a failing APPS. The fix starts with the basics: load-test both batteries, clean every ground, check the brake switch and APPS, then reroute or shield the APPS wiring away from the alternator charge wire. For aftermarket lock-up control, BD's Autoloc lock-up controller and Torqloc converter control system are in this collection.
Repair vs. build
For a stock truck, replace what failed: a governor pressure transducer, the line pressure sensor or a replacement valve body. ATS also offers a GM solenoid block conversion kit, and BD has a pressure transducer upgrade kit, a transducer adapter and a valve body electronics upgrade kit, the BD pieces all listed for 2000-2007. If the truck tows heavy or makes more power, build it. BD's Build-It kits run from Stage 1, labeled for stock horsepower, through Stage 4, including a Stage 4 kit with a torque converter. Billet input, intermediate and output shafts come from both BD and ATS. Either way, add cooling: an auxiliary cooler adds heat rejection for towing.
What we carry
BD Diesel supplies the valve bodies (including one with a governor pressure solenoid and a full manual version), Build-It kits, billet shafts, short shift kits, the 2LOW Unloc, the Autoloc and Torqloc controls, the transducer upgrade parts and an auxiliary cooler. ATS Diesel Performance supplies governor pressure switches, a line pressure sensor, the GM solenoid block conversion and billet shafts. For cooling, Mishimoto has universal transmission coolers (including one with a fan and a universal transmission or power steering cooler), a Ram-specific cooler for 1994-2002 and a radiator and transmission cooler bundle for 1998.5-2002; Fleece Performance Engineering has a cooler and line kit; and CSF has a replacement transmission oil cooler. DNR Customs rounds it out with a Cummins flex plate install kit.
Fitment notes
Watch the year ranges. ATS lists a 47RE governor pressure switch for 1996-1999 and a separate one for 1999-2007, and BD's transducer upgrade parts are listed for 2000-2007, so 1998.5-1999 trucks need to check before ordering. The BD full manual valve body is listed for 1996-2002, and its short shift kits are listed for 1999-2002 and 1998.5-2003. Universal coolers need a mounting spot and line routing worked out; the Mishimoto Ram cooler, Fleece kit and CSF cooler are listed for these trucks. These parts are for 47RE automatic trucks, not the NV4500 or NV5600. Verify by VIN when in doubt.
Frequently asked questions
Is a governor pressure transducer a common 47RE repair?
Yes. Governor pressure solenoid and transducer failures, along with the output-shaft speed sensor, are a known cause of no 1-2 shift, stuck in first and limp mode. Check stored codes and the speed sensor, which should read 600-1,200 ohms, before you condemn the valve body.
Which Build-It stage do I need?
Match the stage to how the truck is used. BD labels its Stage 1 kit for stock horsepower, and the Stage 2, 3 and 4 kits step up from there; one Stage 4 version includes a torque converter. A stock 47RE is rated for only about 450 lb-ft of input, so if you have added power, skip Stage 1. Read each listing's intended use, and call us if you want help choosing.
Not sure what fits? Call the shop at the number in the header, or use the fitment checker on any product page. We install everything we sell.