Ford 4R44E 4-Speed Electronic Automatic · Ford/Lincoln · Expert rebuild service since 1987. Lifetime warranty. Free diagnostic.
1995–2011 Ford Ranger (4-cyl and V6); 1995–2011 Mazda B-Series; 1995–2001 Ford Explorer Sport (2-door); behind 2.3L, 3.0L, and 4.0L OHV engines
| Configuration | 4-speed automatic with overdrive — light-duty truck version |
|---|---|
| Gear Ratios | 1st 2.47:1 · 2nd 1.47:1 · 3rd 1.00:1 · 4th 0.75:1 · Rev 2.11:1 |
| Fluid Type | Mercon ATF (earlier) or Mercon V (later Ranger spec) |
| Fluid Capacity | 11.0 qts total, 5.0 qts service refill |
Standard Ford EPC solenoid failure at 80k–120k miles. Causes low line pressure and clutch slip.
Symptoms: P0745; slip in 1st or 2nd; harsh engagements
The intermediate servo bore wears oval in the 4R44E, preventing band apply and causing 2nd-gear slip.
Symptoms: 2nd gear slip; band adjustment doesn't help; servo bore leaks on pressure test
The overdrive band on the 4R44E wears at high mileage, especially in light-truck applications with frequent towing.
Symptoms: Slip or no 4th gear OD; drops to 3rd on hills
Full disassembly. EPC solenoid replaced. Servo bore measured — Sonnax oversize piston if worn. OD band replaced. All clutch packs replaced. Valve body rebuilt. Full soft parts kit. Converter flushed.
Mercon V ATF every 30,000 miles. The 4R44E in Ranger applications often goes 200k+ miles with regular service — it's a simple, durable unit when maintained.
The 4R55E is a heavier-duty version of the 4R44E with a stronger input shaft and larger clutch packs for Explorer and higher-torque Ranger applications. Most internal parts interchange.
Overdrive band failure or OD servo bore wear. We confirm with a pressure test. Band replacement alone often resolves it without a full rebuild if the clutch packs are good.
Often 150,000–200,000 miles with regular Mercon V service. One of the more durable Ford automatics.
Check the tag on the unit — earlier ones used Mercon, later Rangers spec Mercon V. Do not mix them.
$1,400–2,000. 2-day turnaround.
Free diagnostic, written estimate, lifetime warranty. Chicago's 4R44E rebuild specialists since 1987.
