The R150F and R151F are both Toyota R-series five-speed 4WD transmissions, but they should not be treated as interchangeable names. Their factory engine and transfer-case pairings are different, and that difference matters when ordering transfer-case adapters, shifters and drivetrain parts.
Quick Comparison
| Transmission | Common classic-truck application | Factory transfer-case context |
|---|---|---|
| R151F | 1986–1987 22R-TE Turbo 4WD | 23-spline gear-driven RF1A |
| R150F | 1988–1995 3VZ-E V6 4WD | Factory chain-driven VF1A |
R151F: Turbo 22R-TE Application
The R151F is the transmission most closely associated with the factory 22R-TE Turbo 4WD Toyota Pickup and 4Runner. In this classic-truck application it uses a 23-spline interface with the gear-driven RF1A transfer case.
Shifter position can also vary. Transfer-case suppliers commonly list 1986–1987 R151F setups as either forward-shift or top-shift depending on the original seating/shifter configuration.
R150F: 3VZ-E V6 Application
The R150F is commonly found behind the 3VZ-E 3.0L V6 in 1988–1995 4WD Pickups and 4Runners. Although the transmission side is 23-spline, the factory V6 truck uses a VF1A chain-driven transfer case, not the 4-cylinder RF1A gear-driven case.
Converting an R150F-equipped V6 truck to an RF1A-based single or dual transfer case therefore requires the correct V6/RF1A adapter system. A 23-spline count by itself does not make a transfer case a direct bolt-on.
Why Swapped Trucks Need Hardware-Based Identification
Many Toyota trucks have had engine, transmission or transfer-case swaps. A 1990 truck does not guarantee an R150F, and a 22RE truck can be converted to R-series components. Before ordering, identify:
- Engine currently installed.
- Transmission family and shifter location.
- Factory or swapped transfer case.
- 21-spline vs. 23-spline transfer-case input requirement.
- Top-shift vs. forward-shift configuration.
Related Guides
Start with the Toyota Pickup & 4Runner Transmission Identification Guide, then see the RF1A Transfer Case Identification Guide for gear-driven vs. chain-driven and 21- vs. 23-spline details.
Shop Drivetrain Parts
Browse 1984–1989 4Runner drivetrain parts and 1984–1988 Pickup drivetrain parts. If a truck has mixed R-series/RF1A/VF1A components, use Fitment Help before ordering.