Mazda FN4A-EL 4-Speed Automatic Transaxle · Mazda · Expert rebuild service since 1987. Lifetime warranty. Free diagnostic.
1994–2002 Mazda 626, 1995–2003 Ford Probe, 1998–2005 Mazda 6 (early 2.0L), 2003–2008 Mazda 3 (early FWD)
| Configuration | 4-speed automatic FWD transaxle |
|---|---|
| Gear Ratios | 1st 2.82:1 · 2nd 1.49:1 · 3rd 1.00:1 · 4th 0.72:1 · Rev 2.58:1 |
| Fluid Type | Mazda ATF-M5 or compatible Mercon V |
| Fluid Capacity | 6.8 qts total, 3.0 qts service refill |
Torque converter clutch shudder is endemic on the FN4A-EL. Degraded ATF-M5 or Mercon V causes TCC friction disc glazing.
Symptoms: Vibration at 40–55 mph, DTC P0740, shudder reduces with fresh ATF-M5
The band servo piston seal fails, causing 2nd and 4th gear slip from band engagement loss.
Symptoms: Slip in 2nd gear under acceleration, DTC P0732, RPM flare on 1-2 upshift
Varnish from degraded ATF-M5 clogs solenoid passages, causing shift timing errors.
Symptoms: Late shifts, limp mode, DTC P0750–P0760
FN4A-EL rebuild replaces band servo seal, solenoid body, all clutch packs, torque converter, and all seals. ATF-M5 or Mercon V used.
Mazda ATF-M5 or Mercon V every 30,000 miles. TCC shudder in early stages often resolves with a fresh fluid flush — try this first. Band adjustment should be verified on high-mileage units.
1994–2002 Mazda 626, 1995–2003 Ford Probe, and early Mazda 6/Mazda 3 models.
Mazda ATF-M5 or Mercon V compatible ATF.
A full rebuild ranges $1,300–$1,750 at Chicago Transmission.
TCC shudder from degraded ATF-M5 is the most common FN4A-EL complaint. Start with a fresh fluid flush.
Yes — if the band servo seal is not failed, adjustment alone may restore 2nd gear. A full diagnosis determines which repair is needed.
Free diagnostic, written estimate, lifetime warranty. Chicago's FN4A-EL rebuild specialists since 1987.
