48RE Planetary 2004-2007, used and ready to install. Fits the 48RE. Ships fast from the USA.
If your 2004-2007 Ram 2500 or 3500 with the 5.9L Cummins suddenly stopped pulling in Drive but still backs up, or the pan came off full of steel glitter, the front planetary is one of the first hard parts to look at. This listing is a used six-pinion steel front planetary gear set supplied together with its ring gear (front annulus). It was removed from a 2004 Ram 2500 ST Cummins truck that had covered a lot of miles, so treat it as a working used core that you inspect and measure before it goes in, not as a new part.
The 48RE is a Simpson-type three-speed gear train with an overdrive unit bolted behind it. ATSG describes three separate planetary gearsets in these units: front, rear and overdrive. The rear (forward) clutch is applied in every forward gear and drives the front annulus, so the front planetary carries load in first, second and third. In second gear the front band holds the sun gear and the front set alone produces the 1.45:1 ratio listed in the factory manual. Behind a Cummins that is a lot of torque on six pinions every time the truck pulls a trailer up a grade in second or third.
Start with the cheap checks. Verify the fluid level hot in Neutral, then drop the pan and look at what is on the magnet. Clutch material and a burned smell point toward the overdrive and direct clutch wear these trucks are known for, while chunks of steel point toward hard parts. A no-drive complaint can also come from the forward clutch or a broken input shaft, so a line pressure test belongs in the process. Our 48RE Cummins transmission problems guide walks through which failures show up first on a working truck, and the Ram 2500 Cummins common problems article covers the symptoms owners report most.
The listing covers the 48RE used from 2004 through 2007, which ATSG shows in Ram pickups with the 5.9L diesel and the 8.0L V10 from 2003 on. This particular unit came out of a 2004 Cummins truck. Because the TorqueFlite family shares a lot of geartrain parts across years and models, line it up against your old part before you commit: count the pinions (this one has six), match the spline count in the carrier hub and the annulus, and compare the snap ring grooves. If you are not sure, send us your year and VIN before ordering. You can browse every part we stock for this unit on the 48RE parts page.
| Fits | 48RE 2004-2007 |
| 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.
Yes. This listing is the six-pinion steel front planetary carrier together with its ring gear (front annulus). Thrust washers and snap rings are not included, so plan to use new ones from a rebuild kit.
The listing covers 2004-2007 48RE applications, and this unit was removed from a 2004 Cummins truck. Compare pinion count, hub splines and annulus splines with the part you remove, or send your year and VIN and we will check it before you order.
It can be. The factory diagnosis chart lists a broken front planetary as a cause of no drive with Reverse OK. The forward clutch and input shaft can cause the same complaint, so check the pan for steel debris and run a pressure test before you buy.
Use ATF+4. Chrysler lists an overhaul fill of about 14 to 16 liters (29 to 33 pints) for the 48RE, but always finish by checking the level hot in Neutral on level ground.
Spin every pinion and feel for roughness or play, look for chipped teeth or loose pins, inspect the annulus teeth and snap ring groove, then set geartrain end play to the 0.006 to 0.048 in. range during assembly.
