47RE Rebuild Cost and What Drives It

The call usually starts with "what's it going to cost to rebuild the transmission in my Ram?" The truck is a 1996-2002 Ram 2500 or 3500 with the 5.9L Cummins or the 8.0L V10, and behind it is a 47RE. Nobody can give an honest number over the phone, because the bill depends on what is broken inside, and you will not know that until the unit is on the bench and apart. Two 47REs that both "slip in overdrive" can end up hundreds of dollars apart once the parts are laid out.

What we can do is show you what goes into a 47RE rebuild bill, which parts are on every job, which ones only show up when the truck was driven too long, and the cheap items that decide whether you pay for the job twice. The factory numbers here come from Chrysler's 2001 Dodge Ram Truck (BR/BE) service manual. The known 47RE weak points come from Sonnax, Transmission Digest and GEARS magazine. Sources are listed at the end.

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Recommended 47RE parts for a rebuild

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47RE Transmission Master Rebuild Kit with Filter

$254.99View part

47RE Remanufactured Complete Valve Body 1995-2003

$568.99View part

47RE Planetary

$90.99View part

What Makes Up a 47RE Rebuild Bill

Every 47RE estimate is built from the same six buckets:

• Soft parts: gaskets, seals, sealing rings and the filter. Replaced on every rebuild.
• Frictions, steels and bands: the wear items. Replaced on any real rebuild.
• Hard parts: pump, input and output shafts, drums, planetaries, sun shell, overdrive parts, bushings and thrust bearings. Replaced only when worn or broken.
• Valve body: rebuilt with repair kits, or swapped for a corrected unit.
• Torque converter: rebuilt or replaced, plus a cooler and line flush.
• Fluid, labor and outside items: ATF+4, the drainback valve, cooler lines, and the governor pressure solenoid and sensor if they are suspect.

The first two buckets are close to fixed. The hard parts are where estimates grow, almost always because the truck kept getting driven after it started slipping. Labor to pull, tear down, rebuild and reinstall is the other big number, and it depends more on the shop and region than on the transmission.

The Fixed Part of the Job

A master rebuild kit covers the gaskets, seals, sealing rings, frictions, steels and usually the filter and bands. A plain overhaul kit covers only the soft parts, which is fine for a reseal but not for a slipping unit. Our 47RE master rebuild kit with filter lists at $254.99. Kits with high-energy or performance frictions cost more, and a heavily towed or modified Cummins truck is where that upgrade earns its keep.

Setup is where cheap rebuilds cut corners, and it is labor you want on the bill. From the 2001 manual:

• Input shaft end play: 0.86-2.13 mm (0.034-0.084 in.), measured with the overdrive unit installed. Chrysler says incorrect end play means the unit is assembled wrong or the selective reaction shaft thrust washer is the wrong thickness.
• Front (kickdown) band: torque the adjuster to 8 N·m (72 in-lb), back it off 1-7/8 turns, and hold it while the locknut goes to 41 N·m (30 ft-lb). If adapter C-3705 is needed to reach the screw, the manual drops the torque to 5 N·m (47-50 in-lb). The spec table lists a 3-turn back-off for the rear band.
• Front clutch: the manual notes the 47RE uses four plates and four discs in the front clutch. The overdrive clutch disc and plate count, it says, can vary with the engine and vehicle combination, so count what came out of the unit before trusting a kit's stack.
• Overdrive unit: the intermediate shaft spacer and overdrive thrust plate are both select-fit, chosen from a measured depth.

A shop that measures these instead of guessing is charging for time well spent. A 47RE assembled with the wrong thrust washer or a guessed band adjustment usually shows it within a few thousand miles.

Where the Bill Grows: Hard Parts

This is the part nobody can quote until the unit is apart. On a 47RE, the likely extras are well known.

Input shaft

This is the big one on Cummins trucks. Sonnax calls input shaft failure in Dodge diesel transmissions legendary, and describes the two-piece OE shaft as suffering spline twist, shaft breakage and clutch hub failure. Sonnax sells three upgrades that fit the 47RH/RE and 48RE: the Heavy Duty input shaft (22121B-01), the Smart-Tech input shaft and piston kit (22121B-02K), and the Smart-Tech Big Input Shaft Kit (22121B-08K). The big shaft only fits a converter with a 35-spline turbine hub. So on a Cummins truck with a twisted shaft, the input shaft line and the converter line move together. Budget for both.

Overdrive unit

The factory diagnosis chart for "slips in overdrive fourth gear" (Chrysler Ram Truck Service Manual, Group 21, the same chart in the 1998 and 2001 editions) lists a worn overdrive clutch pack, a blown-out bleed orifice in the overdrive piston retainer, overdrive piston or seal failure, and overdrive thrust bearing failure. Each has its own correction. A worn pack means removing the overdrive unit and rebuilding the clutch pack. A blown orifice means disassembling the transmission to get to the retainer. Thrust bearing failure means replacing the numbered bearings in the overdrive unit. Sonnax also lists an oversized overdrive sprag pilot bushing (12509-01) for 47RE overdrive roller clutch failure.

One real cost saver comes straight from the manual: the overdrive unit can be removed and serviced separately, without pulling the whole transmission. If the diagnosis clearly points to overdrive only and the fluid is clean, that is a smaller job than a full rebuild. If the pan is full of clutch material, it is not. The manual's own correction for debris is that clutch material or metal in the filter and fluid can mean an overhaul is necessary.

Pump and stator support

Mike Brown's 2022 GEARS column on a 1999 Ram 2500 Cummins that stalled when coming to a stop traced the problem to a warped stator support at the feed hole. The warp let the front clutch and converter passages cross-leak, which he found by air testing. His fix was to replace or machine the stator support, and he noted that good used pumps are getting harder to find. Check the stator support for flatness with compression film or Plastigage during every rebuild. A pump that has to be replaced is a significant line item, and one that should have been replaced will bring the truck back.

Gear train and bearings

Sonnax lists a bearing kit (SBK-C16) and a bearing and plate kit (12860-01K) for 47RE bearing failure. Planetaries, the sun shell and drums get replaced only when they are worn, chipped or cracked. Our store lists a 47RE planetary at $90.99 and a 47RE clutch drum at $76.85, which gives you a feel for what one extra part adds. The 2001 manual's diagnosis chart also lists worn or chipped planetary gears as a cause of noise in fourth gear.

Reverse

A burnt reverse band or a no-reverse complaint is a separate set of parts. Sonnax lists a reverse servo piston plug kit (22912-01K) for it. See our 47RE no reverse guide for the diagnosis.

Output shaft (build choice, not a failure item)

For trucks making real power, Transmission Digest covered the Sonnax 22173D-01 extreme duty output shaft: 29-spline, 1.480 in. diameter, and 50% stronger than OE-size aftermarket shafts. On a 47RE it needs a separately sourced 29-spline transfer case input gear. That is an upgrade decision, not something a stock truck needs.

The Valve Body Line

You can rebuild the original valve body with repair kits or install a corrected unit. Sonnax's 47RE unit page shows the usual targets: a throttle valve kit (22771-03K, or 22771-04K oversized) for late or oversensitive 2-3 shifts, a 4-spool switch valve (22771A-01) for lockup shudder and soft TCC apply, and a line pressure plug and sleeve kit (22229-01K or 22229-04K) for poor line pressure control. The Sure Cure kit (SC-46-47RHE-OS) bundles fixes for soft TCC apply, poor kickdown and converter bushing failure.

Rebuilding in-house costs the kits plus bench time with reamers. A remanufactured 47RE valve body for 1995-2003 lists at $568.99 in our store and arrives corrected. Either way, match the calibration to the year. Transmission Digest's January 2005 issue covers 47RE units, before and after rebuild, with a soft TCC apply or repeated TCC failure: release oil does not exhaust fast enough from the front of the converter, and the fix is changing the narrow-slot separator plate to the wide-slot plate. That is a cheap part that decides whether the new converter lives. Our 47RE valve body testing guide covers the bench checks.

The Converter and Cooler Line

Plan on a converter with almost every 47RE rebuild. The unit that failed has usually filled the converter with clutch material, and a rebuilt transmission bolted to a contaminated converter is a comeback. The 2001 manual says the converter must be replaced after a failure that left large amounts of metal or fiber in the fluid. On a Cummins truck, if you are installing the Sonnax big input shaft, the new converter must have the matching 35-spline turbine hub.

The drainback valve belongs on the same line. The Chrysler manual puts it in the cooler outlet line, with a check ball that opens at about 2 psi per the 1998 edition, says it is serviced only as an assembly, and says to replace it rather than clean it after a failure that sent sludge or clutch material through the system. It also warns that a restricted, reversed or misplaced valve causes overheating and possible transmission failure. Flush the cooler and lines before the new converter goes in. On installation, the manual calls for the converter-to-driveplate bolts at 47 N·m (35 ft-lb) and warns that bolts that are too long will damage the clutch surface inside the converter. See the 47RE lockup shudder guide for the converter clutch checks.

Fluid

The 47RE takes Mopar ATF+4, Chrysler type 9602, per the 2001 manual's specification table. Pennzoil's Platinum ATF+4 technical data sheet states it is approved against Chrysler specification MS-9602, with a viscosity index of 198 and a pour point of -48 C, so any fluid carrying that approval qualifies. A refill after a pan and filter change is about 3.8 liters (4 quarts). A rebuilt unit with an empty converter and flushed cooler takes far more, roughly 14-16 liters (29-33 pints) depending on cooler and line size. Our 47RE fluid guide has the full fill procedure.

How to Read a 47RE Estimate

The FTC's auto repair guidance applies directly:

• Get a written estimate that names the condition, the parts and the expected labor, with a line saying the shop will call you before going over a set amount of time or money.
• Ask for your old parts back. The FTC notes state law may require it.
• Ask whether parts are new, remanufactured or salvage. The FTC defines each differently, and a "rebuilt" valve body or converter should say which it is.
• Get the warranty in writing. The FTC says there is no standard repair warranty, so find out the time and mileage limits and where the work can be done.

A good 47RE estimate lists the kit, the converter, the cooler flush and drainback valve, fluid, and a separate allowance for hard parts found at teardown. An estimate that leaves out the converter and cooler work is not cheaper. It just moves that cost to the comeback.

How to Keep the Bill Down

1. Stop driving it when it slips. A 47RE pulled early usually needs the kit and a few wear items. One driven until it quits usually needs drums, shells or a planetary too.
2. Diagnose before tearing down. If the problem is in overdrive only, the manual allows servicing the overdrive unit separately. If it is electrical, the fix may be a sensor or solenoid, not a rebuild.
3. Buy the diesel parts once. On a Cummins truck, the input shaft and converter decide how long the rebuild lasts. Upgrading them during the rebuild costs less than pulling the unit a second time.
4. Fix the cooling. Heat kills 47REs. See our 47RE overheating guide.

Frequently Asked Questions

How much does it cost to rebuild a 47RE transmission?

It depends on what is broken inside. Every rebuild needs a master kit (ours lists at $254.99), a converter, a cooler flush, a new drainback valve, ATF+4 and labor. Hard parts found at teardown, such as a twisted input shaft on a Cummins truck, a pump or a planetary, add to that, and labor varies by shop and region.

What parts fail most in a 47RE behind a Cummins?

The input shaft is the best-known failure. Sonnax describes the two-piece OE shaft as prone to spline twist, breakage and clutch hub failure. The torque converter clutch, the overdrive clutch pack and the valve body switch valve are also common repair items.

Can the 47RE overdrive be repaired without a full rebuild?

Yes, in some cases. The 2001 Chrysler service manual says the overdrive unit can be removed and serviced separately without removing the whole transmission. If the fluid shows clutch material or metal, the manual says an overhaul may be necessary instead.

Do I need a new torque converter when rebuilding a 47RE?

Almost always. A failed unit usually fills the converter with clutch material, and the Chrysler manual says to replace the converter after a failure that left large amounts of metal or fiber in the fluid. Flush the cooler and lines and replace the drainback valve at the same time.

What fluid does a rebuilt 47RE need?

Mopar ATF+4, Chrysler type 9602. A rebuilt unit with an empty converter and flushed cooler takes roughly 14-16 liters (29-33 pints), so fill in stages and finish by the dipstick.

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Related 47RE guides

• 47RE Common Problems and Fixes
• 47RE Slipping: Causes and Fix
• 47RE Torque Converter Lockup Shudder Fix
• 47RE Won't Shift Into Overdrive
• 47RE Fluid Type and Capacity
• 48RE Rebuild Cost and What Drives It
• 46RE Rebuild Cost and What Drives It