2UZ-FE to H55F Conversion Products

2UZ-FE → H55F Adapter Kit - The Cleanest Way to Install Toyota V8 Power Into a Classic Land Cruiser

This adapter kit allows the legendary Toyota 2UZ-FE V8 to bolt directly to the Toyota H55F 5-speed transmission while retaining Toyota's original drivetrain architecture.

Unlike swap solutions that require relocating the transmission or fabricating complicated clutch systems, this system was engineered to work with OEM Toyota components and maintain a clean, serviceable, factory-style drivetrain layout.

All components are designed and manufactured in the United States, and the system is patent pending.

H55F Transmission Compatibility

This adapter is designed for use with the FJ/HJ-series Toyota H55F 5-speed transmission, the coarse-spline version commonly found in Land Cruisers originally equipped with the 2F, 3F, 2H, and 12HT engines.

The adapter is also compatible with the H41 and H42 transmissions equipped with the 10-spline input shaft, as well as all UZ family engines including the 1UZ-FE and 3UZ-FE.

Factory Bellhousing & Clutch Components

The adapter system uses the factory Toyota 2F/3F bellhousing, along with the factory 2F flywheel, clutch, and clutch hydraulics.

This provides several advantages:

• Easy-to-source service parts
• Factory clutch feel and reliability
• No custom clutch linkage or hydraulic fabrication
• Clean installation that looks OEM

Transmission Position & Crossmember Details

The adapter was designed to maintain the original transmission location in the following vehicles:

• 40 Series Land Cruisers originally equipped with an H55F
• FJ/HJ60 Land Cruisers
• FJ/HJ 70 Series Land Cruisers

In these applications the H55F remains in the factory location and utilizes the factory transmission crossmember and drivetrain geometry.

40 Series & 55 Series Using Later H55F Transmissions

When installing a later-model H55F into a 40 Series or 55 Series that did not originally come with one, the transmission typically does not have the early 40-series top-plate mount used by factory H55 installations.

In these cases, the transmission must be supported by an under-transmission crossmember.

To simplify these conversions, we offer a purpose-built crossmember specifically designed for 40 Series 2UZ-FE / H55F swaps. (Contact us for availability)

FJ62 Conversions

When installing this system into an FJ62, an aftermarket transmission crossmember is required because the conversion replaces the factory automatic transmission with a manual H55F.

To simplify this swap, we also offer a crossmember specifically designed for FJ62 2UZ-FE / H55F conversions. (Contact us for availability)

Real-World Driving Characteristics

One of the primary goals of this conversion was to create a drivetrain combination that feels natural and balanced on the road and trail. In real-world driving, the spacing between the gears feels very natural with no noticeable gaps between ratios.

Shift points fall into a comfortable RPM range and do not require revving the engine excessively. The drivetrain works well when shifting at normal driving RPMs, yet the engine still has plenty of range if you want to extend the revs for stronger acceleration.

With 3.70 gears and 33" tires, the drivetrain feels very well matched and provides a comfortable balance of torque and highway drivability. Moving up to a 34" tire still works well with this configuration.

With 4.10 gears and 33" tires, the setup tends to feel slightly over-geared, leaving room to comfortably run 35" tires or larger.

For FJ62 conversions, adding an underdrive gear in the transfer case can be beneficial when running 33" tires or smaller.

Overall, the drivetrain combination feels balanced, predictable, and enjoyable to drive, both on the highway and off-road.

Recommended Gear & Tire Combinations

Based on real-world testing and typical Land Cruiser setups, the following combinations work particularly well with the 2UZ-FE / H55F drivetrain:

These combinations provide a good balance of acceleration, cruising RPM, and drivability with the H55F's gear ratios.

Precision Components

Each kit includes:

• CNC-machined adapter plate
• Precision crankshaft extender
• Mounting hardware
• Installation Instructions

The components are anodized for corrosion resistance and durability.

Everything is engineered to ensure proper crankshaft alignment and long-term drivetrain reliability, even in demanding off-road conditions.

Why This Adapter Is Different from Other 2UZ Swap Adapters

Other 2UZ swap adapters require custom bellhousings, relocated transmissions, or non-standard clutch systems, which can complicate installation and long-term service.

This system was designed with a different approach: retain as many factory Toyota components as possible.

Key differences include:

• Uses the factory 2F/3F bellhousing
• Uses the factory 2F flywheel and clutch components
• Maintains the factory transmission position in most applications
• Retains factory clutch hydraulics and service parts
• Designed specifically for Land Cruiser drivetrain geometry

The result is a conversion that installs cleanly and behaves like a drivetrain combination Toyota might have engineered themselves.

Why the 2UZ-FE?

The Toyota 2UZ-FE is widely regarded as one of Toyota's most durable engines and an ideal upgrade for classic Land Cruisers.

Benefits include:

• Modern V8 power and torque
• Exceptional reliability
• Massive parts world-wide availability
• Proven performance in expedition/overland vehicles and crawlers and daily drivers

Paired with the H55F, it creates an extremely strong and reliable drivetrain combination.

Ideal Applications

Perfect for swaps into:

• FJ/HJ40
• FJ/HJ45
• FJ55
• FJ/HJ60
• FJ62
• FJ/HJ 70 Series Land Cruisers

Price: $2,200

Includes:

• Adapter plate
• Crank extender
• Mounting hardware

Built for Serious Land Cruiser Builders

This kit was developed specifically by and for enthusiasts who want the power and reliability of the 2UZ-FE while preserving the simplicity and strength of the H55F drivetrain.

The result is a swap that feels OEM-engineered rather than improvised.