4R70W Solenoid Kit 2005-2008, new and ready to install. Fits the 4R70W. Ships fast from the USA.
If your 2005-2008 F-150 or other late 4R70W application is flaring between gears, holding second, refusing overdrive or throwing shift solenoid codes, this new solenoid kit is meant to replace the worn electrical parts in a single pan drop. The listing photo shows a dual shift solenoid pack, an EPC solenoid, a TCC solenoid, a transmission filter and a pan gasket, so you get the parts that wear plus the service items you would buy anyway once the pan is off. The listing notes a 1-year warranty and the F-150 as the reference application.
By 2005 the 4R70W had been in production for over a decade, but the control strategy never changed: two shift solenoids decide the gear, one variable force solenoid sets line pressure and one solenoid handles converter lockup. The shift pack is the simplest part of that. Its two coils are either on or off, and the four combinations select 1st through 4th. The EPC solenoid is the subtle one, because Ford laid it out so that zero current gives maximum pressure and more current lowers it. On a late truck with 150,000 miles on it, the usual story is a solenoid that still measures correct resistance but responds slowly or sticks partway once the fluid is hot.
Scan for codes and note commanded versus actual gear on a road test. A solenoid that reads in range on an ohmmeter is not automatically good: Gears Magazine described a Ford EPC solenoid that passed static current checks but stuck at minimum pressure for several seconds when current was ramped, which is exactly the kind of fault behind an intermittent flare. If you have a bidirectional scan tool, command each solenoid and watch for a clean click and steady current. The 4R70W shift solenoid testing guide lays out the gear-to-solenoid fault chart, and if the complaint is a slip under throttle, read our 4R70W common problems guide first, because worn bands and forward clutches cause the same feel.
This kit is listed for the 4R70W from 2005 through 2008, with the F-150 named as the reference vehicle. Sonnax places 1998-2008 units in the same case connector generation, but filter and gasket shape depend on the pan your transmission uses, and late units are commonly seen with a 14-bolt pan. Compare the filter and gasket in the photo to your pan and old filter, check the solenoid connectors against yours, or send your year, model and VIN so we can confirm it before shipping. A 2009-up truck is a different connector design. For other years and parts, browse the 4R70W collection.
Drain the fluid, remove the pan and filter, and unplug the internal harness from each solenoid. Remove one solenoid at a time and fit its replacement in the same position, with fresh O-rings lubed in fluid so none roll during installation. Inspect the internal harness terminals while you are there; if the lead frame is cracked or the pins are loose, the 2005-2008 kit with internal harness replaces that too. Clean the pan and magnet, fit the new filter and gasket, torque the pan bolts evenly and refill with Mercon V. Clear codes and reset adaptive memory before the road test. If the fluid came out black with friction material in the pan, the solenoids were not the only problem, and the 4R75W overhaul kit for 2004-2014 covers the seals and gaskets for a full rebuild.
| Fits | 4R70W 2005-2008 |
| Part type | Solenoid Kit |
| Condition | New |
| Brand | OEM |
| Reference | F150 |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
The listing photo shows a dual shift solenoid pack, an EPC pressure control solenoid, a TCC solenoid, a filter and a pan gasket. If you need the internal wiring harness as well, choose our 2005-2008 kit that includes the harness.
This kit is listed for 2005-2008. The connector generation is shared back to 1998, but the filter, gasket and solenoid details can differ, so for 1998-2004 use the kit listed for those years or send us your VIN.
Second gear is the default when both shift solenoids lose power, so it is often the solenoids, the shared power feed or the harness. Check resistance at the case connector first; if every shift circuit is open from the common pin, look at the wiring before buying solenoids.
Not always, but on a high-mileage unit the others are the same age and the pan has to come off either way. Doing them together, with a new filter, avoids a second pan drop if another one fails a few months later.
Use Mercon V. A pan drop only replaces part of the fluid, so check the level hot with the engine running in Park and top up gradually rather than pouring in a fixed amount.
