4R70W Planetary 1993-2002

The 1993-2002 4R70W covers the heart of Ford's rear-drive lineup: F-150 pickups, the first Expeditions and Navigators, 1996-2001 Explorers and Mountaineers, Mustangs, Thunderbirds and Cougars, and the Crown Victoria, Grand Marquis and Town Car. When one of those starts singing at road speed, drops a gear, or shows steel on the pan magnet after a tow or a hard life in fleet service, a worn planetary is a common reason. This is a remanufactured 4R70W planetary for that early-production window.

What the planetary does in a 4R70W

The 4R70W uses one compound Ravigneaux gearset rather than two simple ones. The forward sun gear and reverse sun gear feed a carrier holding both short and long pinions, and the ring gear wrapped around it is splined to the output shaft. The clutch packs, bands and the one-way devices decide which member is input and which is held, and that combination produces 2.84 first, 1.55 second, direct third, 0.70 overdrive and 2.32 Reverse. Those numerically higher low gears are what set the 4R70W apart from the AODE it replaced, and they put more load through the pinions, needles and thrust washers inside this assembly.

Symptoms that point to the gearset

• A whine or howl that rises with vehicle speed, often changing pitch as it shifts into or out of overdrive
• No Reverse, no first, or no drive at all once splines or a carrier let go
• Shiny steel slivers on the magnet instead of the normal gray paste
• Clunk on engagement or take-off from excessive pinion or carrier end play
• Burned clutches that keep coming back because metal from the gearset is circulating

Confirm it is the planetary first

Separate road-speed noise from engine-speed noise: if it hums in Park or Neutral at idle, look at the pump and converter. Read the pan magnet, and check the cooler for blockage before condemning parts. Our 4R70W Explorer common problems guide and the Crown Victoria guide both cover the noise and debris failures on this generation. With the unit apart, rock each pinion for end play, spin it to feel for rough needles, and check the carrier and ring gear splines.

Fitment

This gearset is listed for 1993-2002 4R70W transmissions. Through those years the ring gear used the early six-hole output speed sensor pattern, which ATRA notes does not interchange with the 2004-up 24-lug design, so do not mix this assembly with late ring gears or sensors. Two variations are worth checking: Ford fitted a stronger gearset behind the 5.4L V8 than in standard-duty units, and 1998-up transmissions changed the intermediate one-way clutch to a mechanical diode. Match the transmission tag, compare the carrier and gear teeth to your old part, or send us your year and VIN. A 2004-specific planetary is listed separately, and every related part is on the 4R70W collection page.

Install notes

• Replace the thrust bearings and washers on both sides of the gearset and any worn bushings in the case and drums.
• Inspect the sun shell for cracks at the base of the gear; a 1993 sun shell is available if yours is damaged.
• Check overall end play and correct it with the selective washer.
• Clean the case, flush the cooler and lines, and install new frictions and seals. The 1996-2003 overhaul kit matches most of this range.
• Fill with MERCON V and check the level hot.

Which vehicles used the 4R70W from 1993 to 2002?

Ford F-150 and Expedition trucks, Lincoln Navigator, 1996-2001 Explorer and Mountaineer, Mustang, Thunderbird, Cougar, Lincoln Mark VIII, and the Crown Victoria, Grand Marquis and Town Car. Always confirm with the tag on the case.

Can I use this in a 2004 or newer 4R70W?

Not with the early ring gear. Ford switched to a 24-lug output speed sensor ring in 2004 and ATRA says early and late ring gears do not interchange. We list a separate 2004 planetary.

Is the 5.4L gearset different?

Yes. Ford used a stronger gearset behind the 5.4L V8 than in standard-duty 4R70W units. If you have a 5.4L truck, compare the carrier to your original or send us the VIN.

Why does my truck whine only on the highway?

Overdrive puts the full gearset to work at high road speed, so worn pinion needles or thrust washers often show up there first. If the noise follows engine speed in Park, check the pump instead.

What fluid does a 1993-2002 4R70W take?

MERCON V. Ford's Motorcraft guidance lists it for vehicles that call for MERCON V or the older MERCON.

• 4R70W Explorer Common Problems and Fixes
• 4R70W Crown Victoria Common Problems and Fixes
• 4R70W F150 Common Problems and Fixes
• 4R70W Expedition Shift Problems: Diagnosis and Fix