Dodge 47RH, 47RE Transmission Band Adjustment

47RH/47RE Transmission Band Adjustment Procedures

The 47RH and later 47RE four speed automatic transmissions are found in 1994 to 2002 (and select 2003) model year Ram 2500/3500 trucks equipped with the 5.9L Cummins turbodiesel. Transmission service is required at 24,000 miles (12v Cummins engines) or 30,000 miles (24v Cummins engines), at which time the front and rear transmissions bands should be adjusted in addition to a typical transmission service/filter replacement. Failure to adjust the transmission bands accordingly may result in premature transmission wear.

Applicable model years: 1994 - 2002 Dodge Ram 2500/3500, 5.9L Cummins turbodiesel
1994 - 1997 transmission filter: MOPAR 3515996, WIX 58707
1998 - 2002 transmission filter: MOPAR 52118789, WIX 58613
47RH/47RE transmission pan gasket: Mahle W39003TC
Automatic transmission fluid spec: MOPAR ATF+4
Service refill capacity: ~4 qts

47RH and 47RE Band Adjustment Specifications

Transmission "bands" literally refers to a series of hydraulically actuated bands that lock a respective component of a planetary gearset. Recall that the selected gear ratio in an automatic transmission is determined by the input and output positions of one or more planetary gearsets. When shifts occur, the transmission of power through the gearsets is manipulated to achieve a particular gear ratio. The bands, like various clutch packs, play a vital role in this operation. Transmission bands can stretch, wear, and loosen with time and use. Thus, adjusting the bands is an important service procedure that correlates to transmission shift quality, performance, and even longevity.

When the transmission band adjustments are out of spec abnormal shift behavior may be exhibited, including harsh engagements, slipping, delayed shifts, and overall poor shift quality. If you're transmission is acting up and you've never had the bands adjusted, this is a good place to start. However, do not expect this procedure to be a cure-all for automatic transmission woes.

Note that there are some discrepancies in the proper adjustment between factory service manuals and aftermarket manuals (Haynes, etc). The following figures were sourced from the appropriate factory repair ("workshop") manual. Refer to these specifications when adjusting the bands.

Model Year

Front Band Adjustment

Rear Band Adjustment

1994

Torque to 72 in-lbs, then back off 2-1/2 turns

Torque to 72 in-lbs, then back off 2 turns

1995 - 1996

Torque to 72 in-lbs, then back off 2-7/8 turns

Torque to 72 in-lbs, then back off 2 turns

1997 - 2002

Torque to 72 in-lbs, then back off 1-7/8 turns

Torque to 72 in-lbs, then back off 3 turns

How to Adjust the Front and Rear Bands on a 47RH/47RE Automatic Transmission

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Transmission pan removal

• Place a suitable oil drain container below the transmission.

• Remove all but (2) of the transmission pan bolts using a 13 mm socket; leave (2) bolts near the center of the pan on opposing sides.

• While holding the transmission pan firmly against the transmission, loosen the remaining transmission pan bolts 1/2 to 3/4 out. Carefully lower one corner of the transmission pan so the fluid can drain. Once it has had a minute to drain, completely remove the transmission pan and discard the transmission pan gasket.

Transmission filter removal

• Remove and discard the transmission filter. It is secured to the valvebody by (3) T25 Torx bolts. Note that a significant amount of fluid will drain once the filter is removed, so position your oil drain container accordingly.

Rear adjustment band location, 47RH/47RE transmission

• The rear transmission band is located towards the rear, passenger side of the transmission at the tip of the armature that controls the band.

Rear band adjustment

• Loosen the adjustment screw locknut with a 9/16" socket and back off 3 to 5 turns.

• Tighten the adjustment screw by rotating it clockwise with a 1/4" socket. Torque to 72 in-lbs (inch lbs, not foot lbs), then back the adjustment screw out (counter-clockwise) per the chart above.

• While holding the adjustment screw in place, torque the locknut to 25 ft-lbs. A crows foot or bent wrench works well for accessing the locknut while preventing the adjustment screw from rotating with a 1/4" socket.

Transmission filter reinstalled

• Install a new transmission filter and torque the (3) bolts to 35 in-lbs.

Transmission pan cleaned with new gasket

• Thoroughly clean the transmission pan and install a new gasket. The magnet is removable so that any clutch material can be easily removed.

• Clean the transmission pan gasket mounting surface of the transmission itself.

• Reinstall the transmission pan. Tighten bolts snug, then torque to 13 ft-lbs (156 in-lbs) in a star/cross pattern.

Front transmission band location, 47RH/47RE

• Locate the front band adjustment screw on the driver side of the transmission just forward of the transmission range selector linkage.

• Loosen the locknut using a 3/4" socket and back off 3 to 5 turns.

• Tighten the adjustment screw by rotating it clockwise with a 5/16" square drive socket. Torque to 72 in-lbs (inch lbs, not foot lbs), then back the adjustment screw out (counter-clockwise) per the chart above.

• While holding the adjustment screw in place, torque the locknut to 25 ft-lbs. A crows foot works well for accessing the locknut while preventing the adjustment screw from rotating with a 5/16" square socket.

Transmission dipstick location, 12v Cummins

• Refill the transmission with ATF through the transmission dipstick tube until the fluid level reaches the appropriate indicating mark on the dipstick.

• Start the engine and allow it to run for several minutes, then recheck the transmission fluid level; add fluid as necessary. Drive the vehicle and test for proper transmission operation, then check and adjust the fluid level once more. A typical refill requires 4 to 5 quarts of ATF.