Remanufactured 4R70W EPC, dual shift solenoid pack and TCC solenoid with a filter and pan gasket for 1998-2004 Crown Vic, E-Series and Expedition.
Owners of a 1998-2004 Crown Victoria, Expedition or E-Series van usually land here with one of three complaints: the transmission slides or flares on the 2-3 shift, it holds a gear it should have left, or the converter will not lock and cruise rpm creeps up. This remanufactured kit covers the parts behind all three in one service: the EPC solenoid, the dual shift solenoid pack, the TCC solenoid, a filter and a pan gasket. The solenoids are tested remanufactured units, so the housings can show cosmetic wear, and the kit lists 6L3Z-7G484-A, F8AZ-7G383-AA, F5AZ-7G136-AA and F8AZ-7G136-AA as the numbers it replaces.
The two shift solenoids in the pack switch on and off to pick the gear, the TCC solenoid applies the converter clutch, and the EPC solenoid sets line pressure for every clutch and band apply. On this transmission the EPC signal acts on the spring end of the pressure regulator valve, and Ford designed it so an unpowered EPC gives full pressure. That matters for diagnosis on police-package Crown Vics and towing Expeditions, which run these units hot: a tired EPC that cannot hold its commanded pressure is one of the reasons intermediate bands and forward clutches burn up early on hard-working 4R70Ws.
Pull codes, then check the solenoids through the case connector. The EPC is a low-resistance coil, around 2.5 to 5.7 ohms on the earlier version according to the TeckPak sheet our guide cites, so do not condemn it for reading low next to the 20-30 ohm shift solenoids. ATRA's Gears Magazine stresses that a circuit code covers the wiring, connector and PCM as well as the solenoid, so check the whole loop with a meter. Most important on this unit: if you have soft shifts with a good EPC reading, Transmission Digest documented EPC oil being lost through a worn pressure regulator bore, which no new solenoid will fix. Our 4R70W EPC solenoid guide covers that air test, and the Crown Victoria 4R70W problems guide lists the other common failures.
Listed for the 1998-2004 Crown Victoria 4.6L, the 1998-2004 Expedition 4.6L and the 2002-2004 E-150 and E-250 with the 4.2L, 4.6L or 5.4L. The same solenoids were used in other 4R70W applications of these years, and Sonnax places 1998-2008 in one case connector generation, but filter and gasket shape follow the pan, so compare your old parts and the part numbers above before ordering. If you are unsure, send us the year, model and VIN. More parts for this unit are in the 4R70W collection.
Drain and drop the pan, remove the filter, and unplug the internal harness from each solenoid. Remove and replace the solenoids one at a time, with lubed O-rings in good condition, and tighten the retaining bolts evenly. Check the harness while it is exposed; heat-cracked insulation or a loose terminal on a 20-year-old unit is worth replacing with the 1998-2008 internal wiring harness. Install the filter and new pan gasket, refill with Mercon V, then clear codes and reset adaptive memory so the PCM relearns shift pressure with the new EPC. If a road test still shows slow, soft shifts, gauge line pressure before going further; a single 4R70W pressure control solenoid is handy to keep as a known-good comparison when chasing a pressure fault.
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Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Remanufactured and tested before shipping. The housings may show cosmetic wear from prior service, which does not affect function. The filter and pan gasket are new.
It is listed for 1998-2004. Later years use the same connector generation, but the parts and pan details can differ, so for 2005-2008 use one of our kits listed for those years or send us your VIN to check.
Sometimes. If the EPC solenoid is weak, yes. If the pressure regulator valve bore is worn, EPC oil leaks away before it reaches the valve and the slip remains, so gauge line pressure and do the air test described in our EPC guide before buying.
6L3Z-7G484-A, F8AZ-7G383-AA, F5AZ-7G136-AA and F8AZ-7G136-AA. Compare them to the tags or casting marks on your old parts.
Clear codes and reset the PCM keep-alive memory, then drive through all four gears at light and moderate throttle so it relearns shift pressure around the new EPC solenoid.
Mercon V, as listed on Ford's fluid chart for the 4R70W, with no additives or friction modifiers.
