RE5R05A Sun Shell 2003-2005, used and ready to install. Fits the RE5R05A. Ships fast from the USA.
If your 2003-2005 Nissan or Infiniti with the RE5R05A five-speed lost a gear, makes a grinding or whining noise that follows road speed, or left chunks of steel in the pan, a stripped or cracked sun shell is one of the hard parts to look at. This is a used original-equipment sun shell assembly for the early RE5R05A, pulled from a 2003-2005 unit and shown in our photo with its splined shaft and lugged hub. A used factory part is the practical choice here, because a new shell is rarely sold on its own and the alternative is often a whole used transmission. It carries a 1-year warranty.
The RE5R05A gets five forward speeds and reverse by locking and driving different members of its planetary gearsets. A sun shell is the thin drum-shaped piece that connects a clutch or brake to the sun gear of a planetary set, so the torque that holds or drives that sun gear passes through the shell's splines and lugs. Because it is a stamped or machined shell rather than a solid gear, it is a common place for damage to show up after a hard failure: splines strip, lugs crack, or the shell spins and welds to a bushing when lubrication is lost. When that happens, the gear that relies on it disappears even though the frictions may look fine.
Start with the fluid and the magnet. Bright, coarse metal points to a hard part, while fine brown paste is friction lining. Scan for codes so you can rule out a solenoid or valve body problem: P0750-series shift solenoid codes and P0745 line pressure codes point to hydraulics, not a broken shell. Sonnax reports that about half of RE5R05A cores have coolant intrusion from the radiator cooler, which destroys bushings and lining alike, so check for milky fluid too. Once the unit is apart, inspect the shell splines, lugs and bushing journal under good light. Our RE5R05A service guide covers the code and fluid checks to do first.
This shell is listed for 2003-2005 RE5R05A transmissions. Those years cover the early production units, which differ in places from later builds; Sonnax notes, for example, that Infiniti changed low coast solenoid resistance in August 2005. Hard parts can change part numbers between early and late units, so lay your old shell next to the photo and compare the spline count, lug pattern and overall height before you order. If you are unsure, send us your year, model and VIN. For later RE5R05A units, see the RE5R05A sun shell listed without a year range, and browse everything for this transmission on the RE5R05A collection page.
Because this is a used part, check it yourself before installation: look for cracked lugs, burrs on the splines and wear on the bushing surface. Contact us before installing if anything looks wrong.
| Fits | RE5R05A 2003-2005 |
| Part type | Sun Shell |
| 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.
It is listed for 2003-2005 RE5R05A transmissions in Nissan and Infiniti rear-drive models. Compare spline count and lug pattern with your old shell or send us your VIN to confirm.
It is a used original-equipment part removed from an RE5R05A, and it is covered by a 1-year warranty.
Thrust washers and bearings next to it, any scored bushings, the seals and gaskets from a rebuild kit, and the planetary or sun gear if their splines are damaged.
Yes. Damaged splines and the parts around them can cause a whine or grind that changes with road speed, and often a lost gear along with it.
Do not assume it will. Early and late RE5R05A hard parts can differ, so match the physical part or send your VIN before ordering.
