48RE Planetary 1965-75, new other (see details) and ready to install. Fits the 48RE. Ships fast from the USA.
This is a new old stock Mopar front planetary carrier, part number 4028110, with three pinions. It was made for the 1965-75 A727 TorqueFlite, the three-speed automatic that the A518 and later 46RE, 47RE and 48RE all grew out of. It is unused, never installed, and the right find if you are restoring a 727 behind a big block or small block and want a factory carrier instead of a worn core. To be straight with you: the 48RE did not exist until 2003. It sits on our 48RE page because it belongs to the same transmission family, but it is a 727-era part first.
The 727 and every RE transmission after it use a Simpson-style geartrain: a front and a rear planetary set sharing one sun gear. The front carrier is splined to the output shaft, and the front ring gear is driven by the rear (forward) clutch. In second gear the kickdown band holds the sun gear through the driving shell, and the front set alone provides the ratio. In first and third it works together with the rear set. That is why the factory diagnosis chart for the RE family lists a broken front planetary as a cause of no Drive with Reverse still working: reverse runs through the rear set and the front clutch, so a truck or car that backs up but will not go forward has the front set on the suspect list.
Rule out the easy causes first. No Drive can also come from a burned rear clutch, worn input shaft seal rings or a failed overrunning clutch, so check fluid level and condition and do a pressure test before tearing the unit down. On a later diesel RE unit, our Ram 2500 Cummins shift problems guide covers that diagnosis order, and what actually breaks in a 48RE shows how the heavy-duty version changed. With the geartrain on the bench, spin each pinion and rock it on its pin. Replace the carrier if the gears, pins or carrier body are damaged in any way.
The listing is a Mopar 4028110 front carrier, three pinions, for the 1965-75 A727. It also calls out TF8, A518 and 48RE use. Treat that wider list as a starting point only. Chrysler revised these geartrains over the decades and heavy-duty diesel units were strengthened, so a three-pinion 1960s-70s carrier may not be what your 48RE or late A518 uses. Before you buy, count the pinions on your old carrier and compare the output shaft spline, ring gear spline and thrust washer tab holes. If they do not match, this is not your part. Send us your transmission tag or year and VIN if you want help. Late-model RE gearsets are on our 48RE parts page.
| Fits | 48RE 1965-75 |
| Part type | Planetary |
| Condition | New Other (See Details) |
| Brand | OEM |
| Reference | A727 |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
It is listed for 1965-75 A727 with TF8, A518 and 48RE called out, but the 48RE was introduced in 2003. This is a Mopar 4028110 three-pinion front carrier from the A727 era. Match it to your old carrier before installing it in any later unit.
New old stock: a new, unused Mopar part that was never installed. Check that the pinions rotate smoothly before assembly since it has been on a shelf.
The classic sign is no Drive while Reverse still works, often with metal in the pan. A burned rear clutch, worn input shaft seal rings or a failed overrunning clutch can cause the same complaint, so confirm with a pressure test and teardown.
The listing is for the front planetary carrier itself. Reuse your front annulus if it is not worn or chipped.
Count the pinions on your current carrier and compare the output shaft and ring gear splines and the thrust washer tabs. If you are unsure, send us your transmission tag or year and VIN.
