AW4 Solenoid Kit 1990-1993, remanufactured and ready to install. Fits the AW4. Ships fast from the USA.
Jeep Cherokee XJ and Comanche owners with the 4.0L and the AW4 automatic usually come looking for this kit after the truck starts pulling away in third, stops shifting into overdrive, or cruises at high rpm because the converter no longer locks. On a 1990-1993 truck those complaints very often trace to one of the three solenoids bolted to the valve body. This kit replaces all three and adds a new pan filter and pan gasket, so the whole service is done with the pan off once.
The AW4 was developed by Aisin with AMC and Jeep and is a cousin of the Toyota A340, which is why parts are often cross-referenced to the A340. Unlike the three-speed automatics it replaced, it has no throttle valve cable deciding the shift points. A separate transmission control unit reads throttle position and vehicle speed and switches solenoids 1 and 2 on and off in combination to move the shift valves for each gear. Solenoid 3 controls the torque converter clutch. Jeep's AW4 overhaul manual gives a resistance check from the solenoid bracket to its terminal of 11 to 15 ohms, which is the quickest way to find a dead coil.
The solenoids in this kit are the later compact design. Early trucks may have larger solenoids with tan connectors; the compact units are made to bolt into the same locations and plug into the original wiring.
These model years predate OBD-II, so there are no generic P-codes to read. Diagnosis on a 1990-1993 AW4 is done with a meter, a road test and a look at the fluid.
Check fluid level and smell first; burnt fluid points to slipping clutches that solenoids will not fix. Next inspect the harness along the transmission and the connector at the case, since corroded pins and a failing neutral safety switch cause shift faults that mimic a bad solenoid. Then measure each solenoid against the 11 to 15 ohm range. Our guide to testing transmission solenoids without a factory scan tool fits these pre-OBD-II trucks well, and our multimeter test guide walks through the readings. If all three test good and the lockup complaint stays, the lockup relay valve in the AW4 valve body is the next suspect.
This kit is listed for 1990-1993. In those years the AW4 with the 4.0L went into the Cherokee XJ, the Comanche pickup through its final 1992 model year, and early 1993 Grand Cherokee ZJ models before Jeep moved that truck to its own four-speed. The kit is also offered for the wider 1987-2001 XJ run, but the 1990-1993 years are what it is listed for here. Because early trucks may have the larger original solenoids, compare connector shape and mounting points against your old parts, or send us your year and VIN. Neighboring years have their own kits, such as the 1990-1992 AW4 solenoid kit and the 1993-1998 kit, and everything else for this transmission is in our Aisin parts collection.
| Fits | AW4 1990-1993 |
| Part type | Solenoid Kit |
| Condition | Remanufactured |
| Brand | OEM |
| Reference | A340 |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Yes. The Comanche used the AW4 with the 4.0L through 1992, and the 1990-1992 trucks are inside this kit's listed range. Compare the connectors with your old solenoids or send us the VIN if you want it confirmed.
No. The kit uses the later compact solenoid design, which is made to mount with the original bolts and plug into the factory wiring in place of the larger early style.
Jeep's AW4 manual gives 11 to 15 ohms measured between the solenoid bracket and its terminal. An open reading or one far outside that range means the solenoid has failed.
Not with a generic OBD-II reader. These trucks predate OBD-II, so the solenoids are checked with a meter and a road test instead.
Mercon or Dexron-type ATF as specified for the AW4. Refill after the pan service and check the level with the fluid hot.
