JDM 2000–2002 TOYOTA HILUX SURF RZN185 3RZ-FE 2.7L A340F 4WD AUTOMATIC TRANSMISSION

Replace a worn, slipping, delayed, or failed transmission with this low-mileage JDM Toyota Hilux Surf RZN185 A340F 4WD automatic transmission.

This unit is intended for compatible 2000–2002 Toyota Hilux Surf RZN185 models equipped with the 3RZ-FE 2.7L gasoline engine and 4WD drivetrain. More importantly, the correct transmission identification for this application is the A340F 4-speed automatic, which makes the drivetrain relationship much clearer than simply describing the unit as a generic Hilux Surf transmission.

The primary fitment relationship is:

Toyota Hilux Surf → N180 → RZN185 → 2000–2002 → 3RZ-FE 2.7L → A340F → 4-Speed Automatic → 4WD

Because Toyota used different drivetrain configurations across the N180 Hilux Surf range, customers should verify the original transmission, chassis, transfer-case configuration, electrical connections, torque converter, sensors, mounts, and driveshaft interfaces before installation.

QUICK DETAILS

• Manufacturer: Toyota
• Model: Hilux Surf
• Generation: N180
• Chassis Code: RZN185
• Years: 2000–2002
• Engine Code: 3RZ-FE
• Engine Size: 2.7L
• Fuel Type: Gasoline
• Transmission Code: A340F
• Transmission Family: A340
• Transmission Type: 4-Speed Automatic
• Drivetrain: 4WD
• Transfer Case: Verify whether included
• Torque Converter: Verify whether included
• Condition: Used OEM JDM / Low Mileage
• Origin: Japan
• Item ID: 254460
• SKU: MT953 3RZ Toyota Hilux
• Warranty: 90 Days
• Shipping: Nationwide Freight
• Installation: Available

A340F 4WD AUTOMATIC TRANSMISSION

The most important transmission identifier for this product is:

A340F

Toyota used the A340 transmission family in several truck and SUV applications. However, the suffix matters because different versions were designed for different drivetrain layouts.

For this Hilux Surf application, the relevant relationship is:

A340F = 4WD Automatic Transmission

Therefore, this unit should not be confused with a 2WD A340-series transmission.

The A340F uses a conventional torque-converter automatic design and provides four forward gears. As a result, the correct product structure should clearly show:

Transmission Code: A340F

Transmission Type: 4-Speed Automatic

Drivetrain: 4WD

RZN185 4WD CHASSIS APPLICATION

This transmission targets the Toyota:

RZN185 Hilux Surf

4WD chassis.

That distinction is especially important because the N180 Hilux Surf was available in multiple drivetrain configurations.

For this product:

RZN185 = 4WD

By comparison, RZN180 represents a different drivetrain layout. Therefore, do not order this transmission for an RZN180 2WD vehicle without complete compatibility verification.

3RZ-FE 2.7L ENGINE APPLICATION

This transmission is intended for the:

3RZ-FE 2.7L gasoline engine

application.

The 3RZ-FE is a Toyota four-cylinder truck and SUV engine used in several Toyota platforms. Nevertheless, engine compatibility alone does not guarantee transmission interchange.

A correct replacement must also match:

• Transmission code
• Chassis
• Drivetrain
• Transfer-case configuration
• Torque converter
• Sensors
• Wiring
• Mounts
• Output configuration

For that reason, the strongest fitment relationship remains:

3RZ-FE + RZN185 + A340F + 4WD

DO NOT CONFUSE THIS WITH 2WD HILUX SURF TRANSMISSIONS

This is a 4WD transmission.

It should not be marketed as a universal N180 Hilux Surf transmission because 2WD and 4WD models can use different transmission configurations.

Before installation, verify:

• RZN185 chassis
• A340F transmission code
• 4WD output configuration
• Transfer case
• Rear driveshaft connection
• Front driveshaft connection
• Electrical connectors
• Sensors

This helps prevent ordering the wrong drivetrain assembly.

TOYOTA HILUX SURF AND TOYOTA 4RUNNER

The Toyota Hilux Surf is closely related to the Toyota 4Runner.

Therefore, some U.S. customers may search for this transmission using terms such as:

• Toyota 4Runner transmission
• 3RZ 4Runner transmission
• Toyota A340F transmission
• 2.7L 4Runner automatic transmission

However, Japanese-market and U.S.-market configurations can differ.

For that reason, do not assume direct 4Runner interchange based only on engine size or model year.

Instead, verify:

• Original transmission code
• 4WD configuration
• Transfer case
• Electrical connectors
• Torque converter
• Sensors
• Mounts
• Driveshafts

before installation.

WHAT IS INCLUDED?

This listing should be treated as the transmission assembly and the components physically attached and shown in the actual product photographs.

Before ordering, verify whether the following components are included:

• Torque converter
• Transfer case
• Wiring harness
• Sensors
• Mounting brackets
• Shift linkage
• Cooler fittings

Only items specifically shown or listed should be considered included.

TRANSFER CASE VERIFICATION

Because this is a 4WD A340F transmission, transfer-case compatibility is important.

Before installation, inspect:

• Transfer-case housing
• Input spline
• Output flanges
• Actuator
• Sensors
• Wiring
• Mounting points

If the transfer case is included with Item ID 254460, state that clearly in the product data.

If it is not included, use:

Transfer Case: Not Included

This prevents confusion and improves fitment accuracy.

TORQUE CONVERTER VERIFICATION

Before installation, inspect the torque converter for:

• Hub damage
• Spline wear
• Seal surface condition
• Mounting pad damage
• Cracks
• Excessive wear

Most importantly, fully seat the torque converter into the transmission before mating the A340F to the engine.

Never use the bellhousing bolts to force the transmission against the engine.

Doing so can damage the transmission pump.

AUTOMATIC TRANSMISSION FLUID

Use the correct Toyota-approved automatic transmission fluid for the exact A340F application.

Do not select fluid simply because the vehicle is a Toyota.

The correct fluid depends on the transmission and production specification.

Therefore, verify the service requirement for this exact A340F before filling the transmission.

Avoid:

• CVT fluid
• Differential oil
• Incorrect universal ATF
• Toyota WS unless specifically required
• Unknown reused fluid

Using the wrong fluid can affect shift quality, hydraulic pressure, clutch operation, and transmission life.

TRANSMISSION COOLER AND LINE SERVICE

Before installing the replacement transmission, thoroughly service the transmission cooler and cooler lines.

A failed automatic transmission can leave:

• Friction material
• Metal debris
• Contaminated ATF
• Sludge

inside the cooling circuit.

Therefore:

• Flush the cooler lines.
• Inspect the cooler.
• Confirm unrestricted flow.
• Remove contaminated fluid.
• Replace the cooler if it cannot be properly cleaned.

Connecting a replacement transmission to contaminated cooler lines can damage the replacement unit.

INSPECT THE TRANSMISSION PAN

Before installation:

• Remove the transmission pan if appropriate.
• Inspect the fluid.
• Check the magnets.
• Look for metal particles.
• Inspect for friction debris.
• Clean the pan.
• Replace the gasket when required.
• Replace or service the filter/strainer when applicable.

This gives the replacement transmission a cleaner service baseline.

INSPECT ACCESSIBLE SEALS

While the transmission is outside the vehicle, inspect:

• Front pump seal
• Torque-converter seal area
• Output seals
• Transfer-case seals
• Shift-selector seal
• Cooler-line seals
• Pan gasket

Replacing questionable accessible seals before installation can prevent avoidable leaks later.

COMPARE THE JDM AND ORIGINAL TRANSMISSIONS

Before installing the replacement A340F, place it next to the original transmission and compare both units carefully.

Check:

• Bellhousing
• Transmission case
• Torque converter
• Sensors
• Wiring connectors
• Speed sensors
• Neutral safety switch
• Shift selector
• Cooler fittings
• Mounting brackets
• Transmission mount
• Transfer-case configuration
• Front and rear outputs

Depending on the vehicle, compatible external components may need to be transferred from the original transmission.

KEEP THE ORIGINAL TRANSMISSION

Do not discard the original transmission until the replacement unit has been fully installed and road-tested.

The original transmission may still be needed for:

• Sensors
• Wiring
• Brackets
• Shift linkage
• Mounts
• Cooler fittings
• Transfer-case components
• Hardware

Keeping it available can simplify the JDM-to-USDM or JDM-to-JDM installation process.

VERIFY ELECTRICAL CONNECTORS

Toyota used configuration-specific electrical components.

Before installation, compare:

• Connector shape
• Pin count
• Sensor locations
• Solenoid wiring
• Neutral safety switch
• Speed sensors
• Harness routing

A transmission can look physically similar while still using different electrical connections.

Therefore, connector verification is an important part of installation.

VERIFY TRANSMISSION MOUNTS

Inspect:

• Transmission mount
• Crossmember
• Brackets
• Bushings
• Fasteners

If the JDM bracket differs from the original vehicle, transfer the correct compatible mounting hardware when appropriate.

A worn or incorrect mount can cause:

• Vibration
• Clunking
• Excessive drivetrain movement
• Misalignment

VERIFY FRONT AND REAR DRIVESHAFTS

Because this is a 4WD transmission, both front and rear drivetrain connections must be checked.

Verify:

• Front driveshaft connection
• Rear driveshaft connection
• Flange design
• Spline configuration
• Overall length
• Joint condition

Do not assume all Hilux Surf or 4Runner driveshafts are interchangeable.

INITIAL INSTALLATION CHECKLIST

Before installation:

• Confirm Toyota Hilux Surf.
• Confirm N180 generation.
• Confirm RZN185 chassis.
• Confirm 2000–2002 model range.
• Confirm 3RZ-FE 2.7L engine.
• Confirm A340F transmission.
• Confirm 4WD configuration.
• Verify transfer case.
• Verify torque converter.
• Compare JDM and original transmissions.
• Inspect front pump seal.
• Inspect output seals.
• Inspect transfer-case seals.
• Inspect transmission pan.
• Inspect filter/strainer.
• Flush cooler lines.
• Inspect transmission cooler.
• Compare sensors.
• Compare electrical connectors.
• Verify neutral safety switch.
• Verify mounts.
• Verify front driveshaft.
• Verify rear driveshaft.
• Fill with correct Toyota-approved ATF.
• Check fluid level using the correct procedure.
• Inspect for leaks.

INITIAL STARTUP

After installation, start the engine and allow the transmission fluid to circulate.

Then:

• Move slowly through each selector position.
• Confirm engagement.
• Check for leaks.
• Monitor fluid level.
• Listen for abnormal noise.
• Confirm Reverse operation.
• Confirm Drive engagement.

Do not immediately perform a hard road test.

MULTIPLE HEAT CYCLES

Run the transmission through several controlled heat cycles.

During each cycle:

• Monitor ATF temperature.
• Recheck fluid level.
• Inspect cooler fittings.
• Inspect pan and seals.
• Confirm normal engagement.

As the converter and cooler fill, fluid level may change. Therefore, use the proper Toyota service procedure rather than estimating the level.

INITIAL ROAD TEST

Begin with a conservative road test.

Monitor:

• Park
• Reverse
• Neutral
• Drive
• Initial takeoff
• 1–2 shift
• 2–3 shift
• 3–4 shift
• Torque-converter lockup
• Delayed engagement
• RPM flare
• Slipping
• Harsh shifting
• Vibration
• Transmission noise
• Transfer-case operation
• 4WD operation
• Fluid leakage

After the road test, inspect the transmission again.

COMMON A340F TRANSMISSION PROBLEMS AND SYMPTOMS

A worn or failed automatic transmission may show:

• Slipping
• Delayed Drive engagement
• Delayed Reverse
• Harsh shifting
• RPM flare
• No movement
• Torque-converter problems
• Overheating
• Solenoid faults
• Fluid leakage
• Abnormal noise

However, similar symptoms can also result from:

• Low fluid
• Incorrect ATF
• Electrical faults
• Failed sensors
• Solenoids
• Torque converter
• Transfer case
• Driveshaft problems

Therefore, diagnose the complete drivetrain before replacing the transmission.

WHY CHOOSE THIS A340F TRANSMISSION?

This individual JDM transmission provides a code-specific replacement option for compatible RZN185 Hilux Surf applications.

Key features include:

• Genuine Toyota OEM JDM transmission
• A340F transmission code
• A340 transmission family
• RZN185 chassis application
• 3RZ-FE 2.7L engine application
• 4-speed automatic
• 4WD drivetrain
• Low-mileage Japanese import
• Actual inventory photos
• Individual Item ID
• 90-day limited warranty
• Nationwide freight shipping
• Affordable installation available

WHY BUY FROM J-SPEC AUTO SPORTS?

J-Spec Auto Sports specializes in Japanese engines, transmissions, and drivetrain components.

Customers benefit from:

• Actual inventory photographs
• Transmission-code identification
• Individual inventory tracking
• Toyota drivetrain experience
• Nationwide freight shipping
• Local Richmond / Henrico pickup
• Installation availability
• Limited warranty coverage

INDIVIDUAL INVENTORY INFORMATION

Vehicle: Toyota Hilux Surf

Generation: N180

Chassis: RZN185

Years: 2000–2002

Engine: 3RZ-FE 2.7L

Transmission Code: A340F

Transmission Family: A340

Transmission: 4-Speed Automatic

Drivetrain: 4WD

Transfer Case: Verify Included / Not Included

Torque Converter: Verify Included / Not Included

Item ID: 254460

SKU: MT953 3RZ Toyota Hilux

Condition: Used OEM JDM / Low Mileage

Warranty: 90 Days

90-DAY LIMITED WARRANTY

This individual transmission carries a 90-day limited warranty, subject to J-Spec Auto Sports’ current warranty terms and installation requirements.

For warranty documentation, retain records for:

• Correct automatic transmission fluid
• Cooler and line flushing
• Filter/strainer service
• Pan inspection
• Seal inspection
• Torque-converter installation
• Transfer-case verification
• Professional installation

FREQUENTLY ASKED QUESTIONS

What transmission code is this?

A340F

What vehicle is it for?

It targets compatible 2000–2002 Toyota Hilux Surf RZN185 4WD applications.

What engine is it for?

The primary application is the 3RZ-FE 2.7L gasoline engine.

Is this a 4WD transmission?

Yes.

This is a 4WD A340F application.

Is this for RZN185?

Yes.

Is this for RZN180?

No direct fitment should be assumed.

RZN180 uses a different drivetrain configuration.

How many gears does it have?

Four forward gears.

Is this a CVT?

No.

It is a conventional 4-speed automatic transmission.

Will it fit a Toyota 4Runner?

Potentially, depending on transmission code, engine, drivetrain, transfer case, sensors, wiring, and mounting configuration.

Verify the original transmission before ordering.

Is the transfer case included?

Verify Item ID 254460 physically.

Only consider it included if it is shown and specifically listed.

Is the torque converter included?

Verify the actual inventory and product photos before ordering.

What ATF should I use?

Use the correct Toyota-approved automatic transmission fluid for the exact A340F application.

Should the cooler be flushed?

Yes.

Flush the cooler and cooler lines before installation.

Should the filter or strainer be serviced?

Yes, inspect and service it when applicable to the exact transmission.

Should I keep my original transmission?

Yes.

Keep it until the replacement transmission is fully installed and road-tested because sensors, brackets, wiring, mounts, or other parts may need to transfer.

Is this transmission rebuilt?

No.

Unless specifically stated otherwise, this is a used OEM JDM Toyota transmission.

Does it have a warranty?

Yes.

Item 254460 carries a 90-day limited warranty.

ORDER ITEM 254460 – TOYOTA HILUX SURF RZN185 A340F 4WD TRANSMISSION

Replace your worn or failed transmission with this low-mileage JDM 2000–2002 Toyota Hilux Surf RZN185 3RZ-FE 2.7L A340F 4WD automatic transmission.

Vehicle: Toyota Hilux Surf

Generation: N180

Chassis: RZN185

Years: 2000–2002

Engine: 3RZ-FE 2.7L

Transmission Code: A340F

Transmission: 4-Speed Automatic

Drivetrain: 4WD

Item ID: 254460

SKU: MT953 3RZ Toyota Hilux

Warranty: 90 Days

Before ordering, verify the original transmission code, transfer case, torque converter, sensors, connectors, mounts, cooler fittings, driveshafts, and complete physical configuration.