Also known as: re4r01a, re4r01, jr402e, nissan 4-speed rear-drive
Jatco's longitudinal four-speed for Nissan — in the 300ZX, Maxima, Navara D22 and Pathfinder.
It is one of the more durable automatics of its era, which changes what a symptom means on a car this old: a harsh change or a slip is far more likely to be fluid, a speed sensor or the throttle position sensor than a worn clutch pack.
The throttle position sensor is worth naming, because on this transmission it does more than report load: a drifting TPS makes the gearbox change at the wrong road speed, or hunt between third and fourth on a light throttle, and it is very often diagnosed as a transmission fault. It is an engine-bay part.
Where it genuinely wears it is the direct clutch and the overdrive band, presenting as a flare on the 3–4 change under load. Heat is what gets there first — these were fitted to vehicles that tow, and an auxiliary cooler is a preventative measure rather than an accessory.
Fluid is Nissan Matic-D, and these predate sealed-for-life entirely, so the interval was specified and is simply often skipped.
Cars fitted with this gearbox
3 generations. Only where a source names the model and the generation together — a gearbox is documented as a product far more often than as a fitment, so this list is deliberately shorter than the truth.
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
Be the first to write this up
Nothing posted about this yet. Whatever you found is worth writing down — even a dead end saves someone the same afternoon.
What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
Sign in or create an account to add what you found about Jatco RE4R01A.