48RE Planetary 2006, used and ready to install. Fits the 48RE. Ships fast from the USA.
Building a 48RE for a 2006 Ram 2500 or 3500 Cummins and found a rear planetary with loose pinions, galled washers or a cracked carrier? This is a used six-pinion steel rear planetary with its matching rear ring gear, removed from a 2006 truck. It is a direct hard-part replacement for a geartrain that has been howling in first, banging into reverse, or that came apart and left metal throughout the case. Carrier and ring gear come as a pair that already ran together in the same unit.
Chrysler built the 48RE by bolting an overdrive unit behind the proven three-speed RE geartrain. That front section uses two planetary sets tied together by a common sun gear. The rear set handles low and reverse: its carrier is held stationary, by the one-way overrunning clutch in first gear and by the low-reverse band in manual low and reverse, while the rear ring gear turns the output shaft. Because the rear carrier is the reaction point at the lowest ratio, it takes full engine torque multiplied through first gear. Pair that with the low-end torque of a 24-valve Cummins and a heavy trailer, and pinion pins, needle bearings and thrust washers wear fastest right here. The overdrive section has a different planetary entirely, so this part is for problems in the main case.
Note which gears make the noise. A rear planetary complaint follows first and reverse; noise only in fourth points to the overdrive planetary, its thrust bearing or the output bearings. Pull the pan and look at what is on the magnet. Our Ram 3500 Cummins common problems guide lists the failure patterns on these trucks, and if you are also chasing pressure or flow problems, 48RE pump failure symptoms explains how a failing pump and a failing geartrain can look alike. Once apart, spin each pinion: any roughness, wobble or pitting means the set is done.
This set was removed from a 2006 Ram 48RE. The listing describes it as the six-pinion steel rear planetary for 2003-2007 Ram 2500/3500 with the 5.9L Cummins. The 2006 truck shares the geartrain with the other 48RE years, but rebuilders sometimes mix parts, so do not assume your unit is stock. Lay this carrier next to yours and compare pinion count, carrier and ring gear splines, and the thrust washer tab holes. Want a second opinion? Send the year and VIN and we will check it. Every other 48RE hard part is on the 48RE collection page.
| Fits | 48RE 2006 |
| Part type | Planetary |
| Condition | Used |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Rear. It is the six-pinion steel rear planetary carrier with the rear ring gear, from a 2006 Ram 48RE.
The listing describes this rear set for 2003-2007 Ram 2500/3500 5.9L Cummins 48RE units. Match pinion count, splines and thrust washer tabs to your old set before installing, or send us the year and VIN.
Reverse uses the rear planetary with the low-reverse band holding the carrier. A broken rear carrier, a failed low-reverse band or band servo, or a front clutch problem can all cause it, so confirm with a pressure test and inspection before replacing parts.
New thrust washers, the overrunning clutch if it shows any wear, and the sun gear if its bushings are scored. Reset geartrain end play with the selective snap ring.
ATF+4, the fluid Chrysler specifies for the 48RE. Check the level with the engine idling and the fluid hot.
