Replaces the failed conductor plate in Chrysler NAG1 five-speed automatics and includes the speed sensor plug adapter, filter and pan gasket.
A Jeep Grand Cherokee, Commander, Liberty or Wrangler, or a Dodge Charger, Magnum, Durango or Nitro that leaks ATF at the round plug on the driver side of the transmission and then starts dropping into limp mode is a textbook NAG1 conductor plate job. This kit is built for doing that job once: it includes the conductor plate, the external plug adapter (the guide sleeve that carries the 13-pin harness connection through the case), a new internal filter and a pan gasket. It cross-references 1402701261, 52108308AB, 52108308AC, 917-678, 2770095, 5S9573 and SU110.
The NAG1 is Chrysler's name for the Mercedes 722.6 five-speed, sold in these vehicles as the W5A580. All of its electronics sit on one molded plate clipped to the valve body: the six solenoids plug into it, and the N2 and N3 Hall-effect speed sensors, the fluid temperature sensor and the park/neutral contact are built into it. Per ATSG, N2 reads the front sun gear and N3 reads the front planetary carrier, and the TCM uses the two to work out input speed and clutch slip. The plug adapter is the bridge between that plate and the vehicle harness. It is sealed by O-rings at the plate and at the case bore, and febi notes those guide sleeve seals are a common leak point. Once they weep, fluid wicks up into the harness connector and the plate contacts start to corrode, which is why replacing the adapter with the plate matters.
Pull codes with a scan tool that reads the TCM, not just the engine computer. Electrical codes that come and go point at the plate; pressure or ratio codes with clean sensor data point at the valve body or clutches instead. Unplug the harness and look for oil or green corrosion in the connector. If the fluid is burnt or the pan is full of friction material, a conductor plate will not fix it. Our 722.6 conductor plate failure guide covers limp mode and the codes, and 722.6 speed sensor symptoms shows how to test N2 and N3 at the plug.
Listed for the Chrysler 300 (2005-2014) and Crossfire (2006-2008); Dodge Charger (2006-2017), Challenger (2008-2014), Magnum (2005-2008), Durango (2011-2013), Nitro (2007-2011) and Sprinter 2500/3500; and Jeep Grand Cherokee (2005-2013), Commander (2006-2010), Liberty (2005-2006) and Wrangler (2012-2017), five-speed automatic only. Many of these vehicles were also built with other transmissions depending on engine and year, so confirm you have the five-speed NAG1 and match your old plate number to the list above, or send us your year and VIN before ordering. More parts for this unit are on our 722.x transmission parts page.
If the solenoids measured out of range during your tests, this is the time to fit a 722.6 solenoid kit as well, and a 722.6 drain and fill kit makes refilling through the fill tube much easier.
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The adapter's O-rings are a common leak point. A leaking adapter lets ATF wick into the harness connector, which corrodes contacts and can take out a new plate. Replacing both together is the standard repair.
It will if the cause is an open speed sensor, solenoid contact or corroded connection inside the plate, which typically shows up as P0715 or P0748 through P0753. It will not fix burned clutches, a worn valve body, or a ratio code caused by mechanical slip.
No. This kit is for the five-speed NAG1 / W5A580 only. Confirm the transmission on the build sheet or the tag on the left side of the case before ordering.
Chrysler, Dodge and Jeep NAG1 applications take ATF+4. Mercedes and Sprinter applications use Mercedes-approved ATF. Check level hot, at operating temperature, with the engine running.
Yes, the solenoids move from the old plate to the new one in the same positions. Measure their resistance first; if any are out of range, replace them while the valve body is out.
