4R70W Master Rebuild Kit 2004-2014, new and ready to install. Fits the 4R70W. Ships fast from the USA.
If your late-model 4R70W is leaking from the pan, the front pump or the extension housing, or you are tearing one down for new clutches, the job starts with a complete reseal. This listing covers 2004-2014 4R70W transmissions, and what is shown in the photo is the gasket and seal portion of an overhaul: the cork pan gasket, valve body and separator plate gaskets, lip seals, O-rings and sealing rings. Friction and steel plates are not pictured, so plan on sourcing those separately if your clutch packs are burnt.
Every clutch and servo in the 4R70W is applied by fluid pressure that has to stay inside its circuit. The pump feeds line pressure through the case, the valve body directs it, and a chain of sealing rings and lip seals keeps each drum and piston pressurized. When those seals harden from heat and age, pressure bleeds off, clutches apply slowly and slip, and the transmission starts to leak at the outside. Replacing all of the gaskets and seals at once is what lets a rebuilt unit hold pressure in every gear, and it is the base of any 4R70W overhaul whether or not the frictions also need replacing.
The 2004-up units carry changes that matter during reassembly. ATRA's interchange notes describe the 2004 ring gear and output speed sensor redesign and the non-magnetic sun shell needed by the turbine speed sensor. ATSG reports that Ford switched from the molded lead frame to a soft wiring harness with new solenoids for 2009, so the internal electrics differ inside this year range. Keep your own harness and sensors in the case they came from.
Clean the outside of the case and find the leak source first; a pan gasket or a single output seal does not need a full kit. If shifts are soft or slipping, scan for codes and pull the pan. A clean magnet suggests a pressure leak that this reseal can cure, while thick friction debris means the clutches also need replacing. Our Crown Victoria 4R70W common problems guide covers the late Panther-car failures, and the Explorer shift problems guide explains how to separate a hydraulic leak from an electrical fault.
This set is listed for 2004-2014 4R70W transmissions. The late units were built in both 4R70W and 4R75W versions, and Ford made electrical and hard-part changes inside this span, so match your case ID tag and the gasket shapes against your old parts, or send us your year and VIN and we will confirm. Browse every version on the 4R70W collection page.
| Fits | 4R70W 2004-2014 |
| Part type | Master Rebuild Kit |
| 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.
The photo shows the gasket and seal set only: pan gasket, valve body gaskets, lip seals, O-rings and sealing rings. Friction and steel plates are not pictured. If you need frictions, look at our banner rebuild kit or contact us to confirm contents before ordering.
Only if the slip comes from a pressure leak and the frictions are still healthy. If the pan has heavy friction material and the fluid smells burnt, replace the clutches as well.
Follow your owner guide. Earlier 4R70W units use MERCON V, while Ford owner guides list MERCON LV for 2009 and later Crown Victoria models.
Check the transmission code on the door tag and the ID tag on the case, and compare the pan and valve body gaskets with your old ones. You can also send us your year and VIN.
Not because of the reseal itself. Test the solenoids while the pan is off. Note that 2009 and later units use a different soft harness and solenoids that ATSG says do not retrofit to earlier years.
