Master overhaul kit for the Ford 4R70W with gaskets, seals, O-rings, friction and steel plates for a full teardown rebuild on 1997-2003 units.
Most 1997-2003 4R70W transmissions that land on the bench got there the same way: an F-150 or Expedition towed a trailer up one grade too many, the fluid cooked, and the transmission now slips into 3rd or 4th, flares between gears or has lost Reverse. This master kit is the full parts load for that teardown. It includes the valve body separator plate gaskets, pump and case gaskets, a cork pan gasket, front and rear seals, the rubber and sealing ring pieces for the clutch pistons and servos, and new friction and steel plates. It also covers the 4R70E, 4R75W and 4R75E built on the same case.
A 4R70W makes its gears by stacking clutch and band applies: intermediate, direct and overdrive work together on the upshifts, and the forward clutch holds the drive path in every forward gear. Heat is what kills them. Once the fluid oxidizes, the friction material glazes and the piston seals harden, so the packs slip a little more each shift and make still more heat. A reseal kit alone will not bring back a pack that is already burned. Fresh frictions and steels on every pack, plus new seals behind every piston, is what restores the holding power.
Rule out the electrical side first. Our 4R70W Expedition common problems guide covers the faults that make a good transmission act burned, and the Expedition shift problems guide separates solenoid and valve body complaints from worn clutches. If the fluid is burned and full of material, the clutches have already paid for it and the rebuild is the repair. If the complaint started right after a previous rebuild with a high-gear start and new solenoid codes, inspect the case connector and internal harness before blaming anything else.
Listed for 1997-2003 Ford 4R70W units and the related 4R70E, 4R75W and 4R75E: F-150, Expedition, Crown Victoria, Mustang and Explorer V8 applications. Two year details matter. ATSG notes that Ford moved to a molded hard wire frame internal harness for 1998, so a 1997 unit has a different internal harness than the later cases this kit also covers; the soft parts still apply, but order harness pieces by year. And 2001-2003 valve bodies lost the stiffener plate under the 2-3 accumulator, which changes what you check during assembly. Match your ID tag, or send us your year and VIN. All parts for this unit are on the 4R70W collection page.
| Fits | Ford 4R70W, 4R70E, 4R75W, 4R75E |
| Years | 1997-2003 |
| Contents | Gaskets, seals, O-rings, sealing rings, friction plates, steel plates |
| Kit type | Master rebuild kit |
| Weight | 7.94 lb |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Full rebuild. Along with gaskets and seals it includes friction and steel clutch plates, so every pack is renewed, not just resealed.
Yes, it is listed for 1997-2003. Keep in mind that 1997 units use an earlier internal harness than 1998-up, so order any harness parts by year.
If the teardown shows burned frictions and hardened seals, yes, this kit replaces both. Inspect the drums and servo for heat damage too, since those are not in the kit.
A filter if you do not have one, the intermediate clutch anti-rattle clip on 2000-up units, and any drum, harness or solenoid parts that fail inspection.
No. The 2004 units changed the ring gear, output speed sensor and sun shell. Use a 2004-up 4R70W kit.
