RE5R05A Clutch Drum 2002, used and ready to install. Fits the RE5R05A. Ships fast from the USA.
The 2002 model year is where the RE5R05A story starts. Sonnax and ATRA both record that this Jatco five-speed first went into production in 2002 behind the 4.5L V8 in the Infiniti Q45, years before it became the familiar truck transmission in the Frontier, Titan and Armada. If you are rebuilding one of those first-year units and the teardown turned up a drum with cracked lugs, a scored piston bore or a bushing that has walked out of round, a new drum from the dealer is hard to find and expensive. This listing is a used, original-equipment RE5R05A clutch drum for 2002, sold as the single drum shown in the photo, with a 1-year warranty.
The RE5R05A gets five forward gears and reverse out of a compound planetary train by holding or driving different gear members with clutches and brakes. A rotating clutch like the one this drum belongs to is a cup that spins with the geartrain. The friction and steel plates stack inside it, and a piston in the back of the cup pushes them together when the valve body sends apply oil. On the drum in the photo you can see the outer ring of splines and the rows of holes in the shell; the holes let fluid thrown outward by the spinning drum escape and cool the plates, and the splines drive the mating member. Because the drum is always turning, its apply oil has to cross from the stationary support into the drum through sealing rings. Any leak along that path, whether from a cracked shell, a worn bushing or a scored seal surface, lowers the clamp force on the plates and shows up as a slip.
Start outside the case: correct fluid level, fluid smell and color, and any stored codes. Our RE5R05A service and diagnosis guide walks through those checks. Look hard for coolant. Sonnax says roughly half of the RE5R05A cores it receives show water intrusion from a failed cooler in the radiator, and milky fluid means the bushings and friction bonding throughout the unit are suspect, not just this drum. Once the unit is apart, air check each clutch with no more than 50 psi of regulated shop air. ATRA's Gears Magazine documented an RE5R05A that needed 70 psi to apply the direct clutch because a steel ring land had worn to 0.018 inch of ring clearance against an expected 0.005 inch, so measure the sealing ring fit before you blame the drum. If the drum shell, splines or bore are the damaged pieces, replace the drum.
The listing covers the RE5R05A for 2002. The documented 2002 application is the Infiniti Q45 4.5L, and early units differ from later ones in places: Sonnax lists three valve body designs that must not be mixed, and Infiniti changed the low coast solenoid resistance in August 2005. Drums were also revised over the years, so lay your old drum next to the photo and compare the spline count, the hole pattern and the overall height before installing. If you are unsure which drum position you need, send us the year and VIN before you order. Every other RE5R05A part we stock is on the RE5R05A parts page.
| Fits | RE5R05A 2002 |
| Part type | Clutch Drum |
| 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.
Possibly, but do not assume it. The drum listed here is for the 2002 RE5R05A, which went into the Infiniti Q45. Truck units came later and parts were revised along the way. Compare spline count, hole pattern and height with your old drum, or send us your year and VIN to check before ordering.
At minimum the piston seals, the frictions and steels for that pack, and the sealing rings on the support that feed the drum. Most rebuilders install a complete master rebuild kit at the same time so every seal and gasket is new.
Look for cracks around the lugs, scoring in the piston bore, a worn bushing or heat discoloration. Then air check the clutch at no more than 50 psi. If it leaks or is slow to apply, find the leak. A worn ring land on the support can look like a drum problem.
Nissan specifies Genuine Nissan Matic-S ATF for the RE5R05A, with Matic J listed as the approved alternative. Check the level with the engine running and the fluid at operating temperature.
A rebuilt RE5R05A can take time to adapt its shifts. Drive it long enough to reach full operating temperature before judging shift quality. In the Gears Magazine case, a harsh 1-2 shift only showed up once the fluid was fully warm.
