4R70W Overhaul Kit 1996-1997, remanufactured and ready to install. Fits the 4R70W. Ships fast from the USA.
Important before you order: although this item sits with our overhaul kits, what you receive is a remanufactured 1996-1997 4R70W valve body with solenoids installed, not a box of seals and clutches. It belongs on this list because many 1996 and 1997 F-150, Expedition, Mustang, Crown Victoria, Grand Marquis and Town Car owners doing an overhaul find that the valve body is what destroyed the old clutches. Rebuilding the hard parts and bolting the original valve body back on can send the fresh unit right back to the shop.
The 4R70W valve body takes pump output and meters it to every clutch and band through spool valves running in machined aluminum bores. As those bores wear, pressure leaks past the valves. The result is low line pressure under load, which lets new frictions slip and glaze in a few thousand miles. This unit was rebuilt with an updated pressure regulator valve, updated boost valve, updated TCC sleeve, updated converter pressure valve and updated solenoid regulator valve, with other repairs done as needed, and then tested on a VBT-4000 valve body tester. Fitting it during an overhaul means the new soft parts get full, correctly regulated pressure from the first drive.
Do a line pressure test with a gauge before and after the teardown. Low pressure that does not rise with throttle, while the pump checks out, points at regulator bore wear. Sonnax's vacuum test guide lists each valve with its typical complaints, and our 4R70W valve body testing guide shows how to vacuum test the bores on your old body. If you also have stored solenoid codes, the EPC solenoid symptoms guide helps separate a bad solenoid from a leaking bore.
Sonnax groups 1996-2000 4R70W bodies by 10mm dowel pins and an F6 rough forging number, then splits them by solenoid style: 1996-1997 bodies use the soft wire harness, while 1998-2000 use the molded lead frame. ATRA notes the case connector is white with soft wiring through 1997 and black from 1998, and the solenoids do not interchange. So a 1998-or-later body will not plug into your truck. Look at your old solenoids and connector color, or send us your year and VIN and we will confirm before it ships. Other years are in the 4R70W parts collection, and if you only need a solenoid service, see the 1993-1997 solenoid and filter kit.
| Fits | 4R70W 1996-1997 |
| Part type | Overhaul Kit |
| Condition | Remanufactured |
| 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 complete remanufactured valve body for the 1996-1997 4R70W, with solenoids included. It does not include seals, gaskets, frictions or steels.
No. 1998 and later 4R70W units use the molded lead frame solenoids and a black case connector. The 1996-1997 soft-wire solenoids will not plug in.
The pressure regulator valve, boost valve, TCC sleeve, converter pressure valve and solenoid regulator valve were updated, with other repairs as needed, and the body was tested on a VBT-4000 tester.
If line pressure was low, the old clutches burned, or the body has high miles, yes. Worn regulator bores starve new clutches of pressure and are a common reason fresh rebuilds fail early.
MERCON V. Check the level with the engine running and the fluid at operating temperature.
