Dismantling an automatic transmission (automatic transmission) on Nissan Terrano (models R51 And R20) is a task that requires not only technical skills, but also careful preparation. This procedure may be necessary when overhauling the transmission, replacing the clutch (in models with a “robot” Jatco JF011E), eliminating oil leaks or installing a contract unit. Unlike a manual transmission, an automatic transmission has more electronic connections, hydraulic lines and fasteners, which complicates the process.

In this article we will look at step-by-step algorithm for removing automatic transmission taking into account the specifics Terrano, including the nuances of working with the subframe, transfer case (for all-wheel drive versions) and the transmission fluid cooling system. You'll learn what tools you'll need, how to avoid common mistakes (such as damaging the torque converter or sensors), and what safety precautions are required when working with heavy equipment. The material is aimed at owners with repair experience, but will also be useful for beginners who plan to delegate work to a service - in order to control the process.

Preparing to remove the automatic transmission: tools and conditions

Before starting work, make sure you have everything you need. Removing the box Nissan Terrano takes 6–10 hours (depending on experience) and requires the following tools:

  • 🔧 Set of sockets and keys: 10 mm, 12 mm, 14 mm, 17 mm, 19 mm (required with extension cords and ratchet).
  • 🔨 Jack and supports for lifting the car (or lift). Important: the box weighs ~70–90 kg - you will need a transmission jack or an assistant.
  • 🔩 Puller for the torque converter (if it is planned to be replaced).
  • 🛠️ Torque wrench (for tightening bolts to the correct torque).
  • 🧰 Set of screwdrivers (phillips and flat), pliers, hammer.
  • 🩹 Protective equipment: gloves, glasses, overalls (ATF liquid is toxic!).
  • 📦 Containers for draining oil (minimum 5 liters) and sealant for seals.

Also prepare your work space: a level area with good lighting, access to power (for diagnostic equipment) and the ability to maneuver heavy parts. If you are working in a garage, make sure there is no moisture on the floor - water getting into the disassembled box will lead to corrosion of the clutches.

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Before removing the automatic transmission, take a photo of the location of all connectors and tubes on your smartphone. This will save hours of reassembly, especially if this is your first time working with Terrano.

Don't forget about fault diagnosis before dismantling. Often problems with automatic transmissions (for example, kicks when switching or delays) are solved by changing the oil or solenoids, which does not require complete removal of the box. Use a scanner (eg Launch X431) to read errors according to the protocol OBD-II - this will help more accurately determine the cause of the breakdown.

Draining the oil and disconnecting the hydraulic lines

The first stage is draining the transmission fluid (ATF). On Nissan Terrano with automatic transmission RE4R03A or Jatco JF011E this is done through a plug in the pan. Algorithm:

  1. Start the engine and warm up the box to operating temperature (50–60°C) so that the oil becomes less viscous.
  2. Place a container with a volume of at least 5 liters under the drain hole (located at the back of the pan).
  3. Unscrew the plug with the key to 24 mm and wait until the liquid is completely drained.
  4. Remove the pan, clean it and the magnets from metal shavings (their presence indicates wear of the clutches).

After draining the oil, disconnect the hydraulic lines leading to the automatic transmission cooling radiator. Be careful: there may be liquid under pressure in the tubes. Use open-end wrenches to avoid stripping the edges on the fittings. Important: Mark the tubes with a marker or tape so as not to mix them up when reassembling - incorrect connection will lead to overheating of the box.

What to do if the oil in the automatic transmission is black and smells like burning?

Such fluid indicates critical wear of the friction discs or bearings. In this case required complete disassembly of the box with replacement of all worn parts. Simply draining the oil will not solve the problem - wear particles will remain in the valve body and solenoids.

Also disconnect the electrical connectors from the box. On Terrano there are usually three of them:

  • 🔌 Speed sensor connector (located on top of the box).
  • 🔌 Solenoid connector (on the hydraulic unit).
  • 🔌 ATF temperature sensor connector (can be combined with the first one).

Use a plastic spatula to carefully remove the chips - do not pull on the wires!

Removing driveshafts and transfer case (for 4WD)

On all-wheel drive versions Nissan Terrano Before removing the automatic transmission, you must disconnect the transfer case (transfer case). This adds complexity as it requires removal of the driveshafts and additional fasteners. Procedure:

  1. Mark with a marker the position of the driveshafts relative to the flanges - this will simplify balancing during assembly.
  2. Unscrew the bolts securing the shafts to the transfer case and rear axle (key on 14 mm).
  3. Remove the shafts, first supporting them so as not to damage the bearings.
  4. Disconnect the transfer case from the automatic transmission by unscrewing 4–6 bolts (depending on the year of manufacture).

On models with the system All Mode 4x4 pay attention to transfer case electronic control unit — its connector is located next to the mode switch lever. Do not pull the wires, but gently press the latch.

📊 What type of drive does your Nissan Terrano have?
  • Front (2WD)
  • Full (4WD with transfer case)
  • Full (connected automatically)
  • I don't know

For front-wheel drive versions, the process is simpler: just unscrew the drive shafts from the box (use a snap ring puller) and move them to the side, securing them with wire. Warning: do not allow the shafts to hang on the inner CV joints - this will lead to deformation of the boots and failure of the joints.

Removing the subframe and engine mounts

automatic transmission on Terrano is attached to the engine and subframe, so to dismantle it you need to:

  1. Secure the engine using a strap and hoist (or a jack with a wooden shim).
  2. Unscrew the engine mounts (3 bolts on 17 mm above and 2 below).
  3. Remove the subframe, first disconnecting the steering rods and anti-roll bar.

At this stage, difficulties often arise with “stuck” bolts. If the fasteners do not budge, use a penetrating lubricant (e.g. WD-40 Specialist) and give it time to act (10–15 minutes). Never use a percussion instrument - this can damage the threads in the aluminum box housing.

Secure the engine with a rigging belt|Unscrew the engine mounts (5 bolts)|Disconnect the tie rods from the rack|Drain the power steering fluid (if access is obstructed)|Mark the position of all brackets-->

After removing the subframe, check the condition of its rubber bushings. If they have cracks or delaminations, replace them - this will eliminate vibrations and extend the life of the new (or repaired) automatic transmission.

Disconnecting the automatic transmission from the engine and dismantling it

The box is now ready to be removed. Sequence of actions:

  1. Unscrew the bolts securing the box to the engine (usually 6–8 pieces, the key is on 14 mm or 17 mm). Start with the top bolts, gradually moving to the bottom.
  2. Carefully separate the box from the flywheel using a spatula. Attention: Do not insert a spade between the box and the cylinder block - this will damage the sealing gasket.
  3. Place the transmission jack under the box and slowly lower it, controlling the position of the torque converter (it may fall out when tilted).

If the torque converter remains on the engine shaft, remove it with a puller. On Terrano models with engine MR20DE or QR25DE The torque converter has a unique fastening - use a puller with three legs so as not to deform its body.

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The torque converter is the most vulnerable part when removing an automatic transmission. Its fall or impact will lead to imbalance and vibration during movement. Always support it with your hand or a special holder.

After dismantling the box, inspect it for external damage: cracks in the crankcase, traces of oil leaks from seals or sensors. Pay attention to the condition of the valve body - if it shows signs of overheating (darkening of the metal), it will need to be replaced or washed.

Common mistakes and how to avoid them

Even experienced technicians make mistakes when removing an automatic transmission. Nissan Terrano. Here are the most common ones and how to prevent them:

Error Consequences How to avoid
Incorrect bolt tightening torque Flange deformation, oil leak Use a torque wrench (torques are indicated in the manual)
Torque converter damage Vibrations, noise, failure Support it when removing it, use a puller
Mixed up hydraulic tubes Automatic transmission overheating, loss of pressure Mark tubes before disconnecting
Ignoring pallet check Chips getting into a new box Clean the tray and magnets, change the filter

Another common problem is wiring damage when disconnecting connectors. On Terrano the harnesses pass close to the manifold outlet and may melt. Before assembly, check the integrity of the insulation and contacts using a multimeter (the resistance between the wires and ground must be at least 1 MOhm).

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If, after removing the automatic transmission, you find large metal particles (more than 1 mm) in the pan, this is a sign of destruction of the planetary gear set or bearings. In this case, repairing the box will cost more than replacing it with a contract one.

Also don't forget about clutch disc alignment (for models with "robot" JF011E). If the disc is displaced, the box will not fit into place, and forced installation will lead to breakage of the input shaft.

Installation of automatic transmission and running-in after repair

Assembly is carried out in the reverse order, but taking into account several nuances:

  • 🔧 Before installation, apply a thin layer of sealant to the surface of the box housing in contact with the engine.
  • 🔩 Tighten the bolts crosswise in 2-3 approaches to avoid distortion.
  • 🛢️ Fill with new oil (recommended Nissan Matic Fluid S or Idemitsu ATF Type-J).
  • 🔄 After installation, adapt the solenoids using a diagnostic scanner.

Running in a repaired or new automatic transmission should be done in a gentle manner:

  • 🚗 Avoid sudden acceleration and braking for the first 500 km.
  • 🔄 Do not tow a trailer or overload the vehicle.
  • 🔥 Monitor the ATF temperature (norm up to 90°C).

1,000–1,500 km after installation, check the oil level and add if necessary. If during this period there are jerks or delays when switching, repeated diagnostics are required - the pressure in the valve body may need to be adjusted.

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After replacing the automatic transmission with Nissan Terrano Be sure to reset the adaptation values in the control unit using a scanner. Without this, the box will operate in emergency mode with switching delays.

FAQ: Frequently asked questions about removing an automatic transmission on a Nissan Terrano

Is it possible to remove the automatic transmission on a Terrano without a lift?

Theoretically, yes, but it is extremely inconvenient and dangerous. The box weighs ~80 kg, and it is almost impossible to hold it manually during dismantling. Minimum requirements: jack with supports and transmission trolley (or assistant).

What kind of oil should I fill in after installing the automatic transmission?

For boxes RE4R03A And JF011E recommended Nissan Matic Fluid S (article KE908-99931). Analogues: Idemitsu ATF Type-J or Ravenol ATF JWS 3309. The volume for a complete replacement is 8–9 liters.

Is it necessary to change the torque converter when overhauling an automatic transmission?

It is necessary if bearing play (more than 1 mm) or signs of overheating (darkening of the blades) are found in it. Even if outwardly it looks normal, the internal blades could be deformed from high temperatures.

How much does it cost to remove an automatic transmission at a service center?

The cost of work in 2026 varies from 8,000 to 15,000 rubles (depending on the region and type of box). For all-wheel drive versions, the price is 20–30% higher due to the complexity of dismantling the transfer case.

What to do if vibrations appear after installing the automatic transmission?

The reasons may be the following: an incorrectly installed torque converter, an imbalance of the driveshaft (for 4WD) or a damaged flywheel. It is necessary to remove the box again and check the alignment.