4R75W Planetary, used and ready to install. Fits the 4R75W. Ships fast from the USA.
Searching for a 4R75W planetary usually means a 2000s Ford F-150, Expedition, Lincoln Navigator, Crown Victoria, Grand Marquis or Town Car now howls at highway speed, has dropped a gear, or left steel flakes in the pan. This is a used OEM 4R75W planetary gearset, the heavy-duty version of the 4R70W's compound gearset, for replacing one with worn pinions or damaged splines at a fraction of new cost.
The 4R75W is Ford's later, stronger development of the 4R70W four-speed rear-drive overdrive. Like its predecessor it makes every gear from one compound gearset - forward and reverse sun gears, short and long pinions in a single carrier, and a ring gear connected to the output shaft - giving 2.84 first, 1.55 second, direct third and a 0.70 overdrive. The clutches and the band hold or drive different members, and the gearset delivers the ratio. Worn pinion needle bearings or thrust surfaces let the gears run out of mesh, and that is the whine you hear.
ATRA's interchange notes are useful here. The planetary gear set has the same ratio and dimensions across the 4R70W and 4R75 units; the main difference is that later carriers have a welded rear cover where older ones used rivets, and ATRA says interchange between years is not a problem. The ring gear is a different story. Around the 2004 model year Ford moved the output speed sensor to read 24 lugs on the ring gear instead of six machined holes, and ATRA states there is no interchange: an early ring gear in a late case cuts the sensor signal and the truck will not shift out of first, while a late ring gear in an early case reads fast and shifts into fourth almost immediately.
Separate gear noise from pump or converter noise first: gearset noise follows vehicle speed, while pump noise follows engine rpm in Park. Check the pan magnet for steel, and scan for ratio and output speed sensor codes. Our Expedition common problems guide and F-150 shift problems guide cover the related failures on the trucks that use this transmission.
This gearset is listed for the 4R75W without a specific year range. Because ATRA shows the carrier interchanges across years but the ring gear does not, compare this assembly to your old one on the bench: pinion tooth counts, carrier height, spline counts and, if a ring gear is attached, whether it has six machined holes or 24 lugs for the speed sensor. Match your own transmission, and if you are unsure, send us your year and VIN before ordering. Every part for this family is on the 4R70W and 4R75W collection page.
| Fits | 4R75W |
| Part type | Planetary |
| Condition | Used |
| 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.
ATRA reports the gearset has the same ratio and dimensions across the 4R70W and 4R75 units, with only a welded versus riveted rear cover difference. The ring gear and output speed sensor design changed around 2004 and does not interchange, so check that part separately.
One documented cause is an early six-hole ring gear installed in a 2004-up case. The output speed sensor loses most of its signal and the computer will not upshift. A late ring gear in an early case does the opposite and shifts into fourth too soon.
A whine or howl that follows road speed and often changes from gear to gear. Noise that follows engine speed in Park points to the pump or torque converter instead.
Thrust washers, needle bearings and bushings around the gearset, plus the filter and a cooler flush. If the sun shell is cracked, replace the shell, bearing and forward sun gear as a matched set.
Most 4R75W trucks use MERCON V. Some late Panther cars with the 4R75E moved to MERCON LV, so go by your owner guide or dipstick.
