The Jatco JR401E (or 4N71B) 4-speed automatic transmission was assembled from 1983 to 1997 and installed in rear- and all-wheel-drive Nissan models, as well as Mazda under the N4A-EL designation. This transmission is based on the 3-speed 3N71B and is available in two versions: the L4N71B and the E4N71B.
Specifications
| Type | automatic transmission |
| Number of gears | 4 |
| Type of drive | rear / all wheel |
| Engine volume, l | up to 3.0 |
| Torque output, Nm | up to 280 |
| Recommended oil | Dexron III |
| Oil capacity, liter | 7.0 |
| Partial replacement, liter | 4.5 |
| Maintenance | every 80 000 km |
| Gearbox lifespan, km | ~300 000 km |
Gear ratios Jatco JR401E
Using the example of a 1985 Nissan Laurel with a 2.0 liter engine:
| Main | 3.889 |
| 1st | 2.842 |
| 2nd | 1.542 |
| 3rd | 1.000 |
| 4th | 0.686 |
| Reverse | 2.182 |
Using
The transmission was installed on:
- Mazda 929 III (HC) in 1986 – 1991;
- Mazda B-series IV (UF) in 1985 – 1998;
- Mazda MX-5 I (NA) in 1990 – 1997;
- Mazda MPV I (LV) in 1988 – 1995;
- Mazda RX-7 I (SA) in 1984 – 1985;
- Mazda RX-7 II (FC) in 1985 – 1988;
- Mitsubishi Starion 1 (A180) in 1983 – 1989;
- Nissan 200SX 3 (S12) in 1983 – 1989;
- Nissan 300ZX 3 (Z31) in 1983 – 1989;
- Nissan Caravan 3 (E24) in 1986 – 1990;
- Nissan Hardbody 1 (D21) in 1985 – 1990;
- Nissan Laurel 4 (C31) in 1983 – 1984;
- Nissan Laurel 5 (C32) in 1984 – 1989;
- Nissan Maxima 1 (G910) in 1983 – 1984;
- Nissan Pintara 1 (R31) in 1986 – 1990;
- Nissan Skyline 6 (R30) in 1983 – 1985;
- Nissan Skyline 7 (R31) in 1985 – 1989;
- Nissan Silvia 4 (S12) in 1983 – 1989;
- Nissan Pathfinder 1 (WD21) in 1985 – 1989;
- Nissan Terrano 1 (WD21) in 1985 – 1989;
- Nissan Vanette 2 (C22) in 1985 – 1994.
Disadvantages of the Jatco JR401E gearbox
- This is a very reliable automatic transmission, and all its problems are due to old age and infrequent lubrication changes.
