4R70W Shift Kit 1991-2008, new and ready to install. Fits the 4R70W. Ships fast from the USA.
This is the TransGo shift kit sold in the box marked "AODE & 4R70W Shift Kit," a valve body repair kit for the Ford 4R70W in F-150s, Expeditions, Mustangs, Crown Victorias, Grand Marquis and Town Cars. Owners usually find it after the truck starts taking a long, lazy 1-2 shift, the Mustang bangs on a highway kickdown, or a rebuild comes apart with a burned overdrive band and forward clutch. TransGo lists the kit for the AODE, 4R70W/E and 4R75W/E from 1991 on; this listing is the same kit offered for 1991-2008 applications.
The 4R70W is the wide-ratio descendant of the AODE. Gear selection is electronic, but every apply is hydraulic: the EPC solenoid sets line pressure, the solenoid regulator feeds the shift solenoids, and spring-loaded accumulators stretch each shift out. When those valves wear their bores, pressure leaks away and the accumulators let each clutch slip longer than it should. TransGo's instructions describe the real weakness of this family as friction life and parts breakage rather than shift feel, and the kit is built to stop that. During a hard kickdown from fourth, a pressure drop or spike can let the engine and converter free-run up to around 4000 rpm against the 2nd roller clutch before second gear takes hold. The kit changes the 4-2 kickdown into a fast 4-3-2 sequence so the shift completes first.
TransGo lists a no-stick solenoid regulator valve, a drop-in pressure regulator valve, upgraded accumulator springs, an EPC relief system, a 3rd accumulator plate saver and high-tech forward clutch sealing rings in the kit.
Rule out electrical faults first. In 1998 Ford changed the 4R70W from a soft-wired internal harness with a white case connector to a black connector with a hard plastic lead frame, and the wrong harness or a damaged connector can set multiple solenoid codes and erratic shifts that look like a pressure problem. Our shift solenoid testing guide covers the checks. Truck owners should then read the F-150 shift problems guide, and Expedition owners the Expedition guide, both of which map flare, slip and harsh engagement to the specific valves this kit replaces.
The kit covers the AODE, 4R70W, 4R70E, 4R75W and 4R75E, 1991 and later, which spans every 4R70W from 1993 through 2008. There are two year-specific points to know. The forward clutch sealing rings in the kit fit 1991-2003 stator supports; on 2004 and later units with factory plastic-type rings, TransGo says to keep the originals. And from 2001 on, Ford deleted the 2-3 accumulator stiffener plate, which Sonnax ties to separator plate bowing and forward-to-direct clutch cross leaks, so inspect the plate on later units. Match your year and VIN, or send them to us. Browse the rest of this family on our 4R70W/4R75W collection page.
| Fits | 4R70W 1991-2008 |
| Part type | Shift Kit |
| Condition | New |
| Brand | TransGo |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Yes. TransGo builds one kit for the whole family, labeled AODE and 4R70W, and catalogs it for the AODE, 4R70W/E and 4R75W/E from 1991 on.
Both 4R70W units fall inside the kit's coverage. The difference is the forward clutch sealing rings: use the supplied rings on 1991-2003 units and reuse the factory plastic-type rings on 2004 and later units.
The valve body work can be done in the vehicle with the pan and valve body removed. The sealing rings and band reshaping require a teardown.
Probably not by itself. A single-gear fail-safe with circuit codes points to solenoids, the internal harness or the case connector. Diagnose the electrical side first, then use the kit to correct pressure-related slip and flare.
If the unit is apart, a master rebuild kit and a new band are common. If the pan is only down, a filter and any failed solenoids. TransGo also recommends a steel 2nd accumulator piston in place of an aluminum one.
