4R70W Tcc Solenoid 2005-2008, new and ready to install. Fits the 4R70W. Ships fast from the USA.
When a late-model Ford with the 4R70W or 4R75W starts shuddering at a steady 45 to 55 mph, holds a few hundred extra RPM on the highway, or sets P0741 or P0743, the torque converter clutch solenoid is one of the first parts to test. This listing is a new TCC solenoid for 2005-2008 units, the years that cover the last Crown Victoria, Grand Marquis and Town Car builds of this transmission family along with the remaining truck applications. What ships is more than the TCC solenoid pictured: it is a full solenoid service set with the TCC lockup solenoid, the EPC solenoid and the dual shift solenoid assembly, plus a new filter and a bonded rubber pan gasket, so one pan drop renews every solenoid on the valve body.
The 4R70W selects its gears with two on/off shift solenoids and sets line pressure with the EPC solenoid. The TCC solenoid has one job: when the PCM decides conditions are right for lockup, it energizes the solenoid, which sends signal oil to the bypass clutch control valve. That valve strokes and routes apply oil to the converter clutch, locking engine and transmission together at cruise. If the solenoid sticks, leaks past its seat or loses its O-ring seal, the signal oil is weak or erratic and the clutch slips instead of locking firmly. That slip is the shudder you feel and the slip code the PCM stores.
Check the fluid first. Burnt or varnished Mercon V can cause shudder on its own, and a new solenoid will not fix it. Next, measure the TCC circuit at the case connector; Sonnax lists 10-16 ohms for the TCC solenoid on 1998-2008 units. Remember that an electrical code describes the whole circuit, so check the harness and connector before condemning the solenoid. Our 4R70W solenoid testing guide covers the pin-out and resistance checks, and the Crown Victoria common problems guide explains how lockup faults show up on the Panther cars. If the solenoid tests good but slip remains, Sonnax points to wear at the bypass clutch control valve, which needs valve body work rather than a solenoid.
The listing covers the 4R70W for 2005-2008. Ford built this family as both the 4R70W and the 4R75W, and Sonnax notes that 2001-2008 valve bodies use solenoids that plug into a molded lead frame harness, while 2009-later bodies use solenoids on a soft wire harness. That makes connector style the most important thing to check. Pull your old solenoids and compare their connectors and mounting to the new parts, or send us your year and VIN and we will confirm it. A 2009 truck or car needs the 2009 4R70W TCC solenoid instead. Every part we stock for this transmission is on the 4R70W collection page.
If the lead frame or connector is cracked or brittle, replace it with the 1998-2008 4R70W internal wiring harness while the pan is off. If the fluid is black or full of clutch material, the 4R70W master rebuild kit is the better use of your money.
| Fits | 4R70W 2005-2008 |
| Part type | Tcc Solenoid |
| Condition | New |
| 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.
It is a set. Along with the TCC solenoid shown in the photo, you get the EPC solenoid, the dual shift solenoid assembly, a filter and a bonded rubber pan gasket.
Sonnax notes that 2009-later valve bodies switched to solenoids on a soft wire harness, so a 2009 may need a different part. See our 2009 listing or send us your VIN.
Sonnax lists 10-16 ohms for the TCC solenoid on 1998-2008 units. Also check the harness and connector, because an electrical code covers the whole circuit.
Yes. If the solenoid and circuit test good and the PCM commands full lockup but slip stays high, the converter clutch or a worn bypass clutch control valve bore is the likely cause.
Mercon V ATF. Ford's fluid reference lists Mercon V for the 4R70W and 4R75W and advises against adding friction modifiers or other treatments.
