Current BlackBox Build Time is 12 Weeks
BlackBox-C – Land Cruiser-Specific Underdrive Solution
With limited options for added crawl and low-range gearing in the Land Cruiser world, we set out to bring the proven strength, versatility, and compact design of the BlackBox to a platform that truly deserves it.
The BlackBox-c is purpose-built for the widely used 19-spline ‘split-case’ Land Cruisers found in the 40, 60, and 70 Series from 1980–1989—rigs that are legendary for their toughness and reliability in the harshest environments on Earth.
Why We Built It:
Land Cruisers are capable, but their stock gearing is a weak link. Current market options offer either a single lower range (not enough) or a dual gearbox that lacks strength and reliability.
The BlackBox-c solves this with:
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Multiple low-range options
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Compact and robust billet aluminum construction
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A direct-fit solution designed specifically for Land Cruisers
Key Development Goals:
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Shortest Assembled Length – Critical for maintaining driveshaft geometry
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Cruiser-Specific Design – No unnecessary adapters or spacers
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BlackBox Cross-Compatibility – Modular by nature, integrates with existing BlackBox components
Transmission Compatibility:
Using our custom transmission mount, the BlackBox-c fits the following 19-spline Land Cruiser transmissions:
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H42 (4-speed manual) – With or without extension housing
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H55 (5-speed manual)
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A440 (4-speed automatic)
Whether you're building an expedition rig, a rock crawler, or just want more control on the trail, the BlackBox-c gives your Cruiser the gearing upgrade it truly deserves.
Cross Compatibility
The BlackBox-C has a hidden feature that some customers are going to find extremely valuable: the ability to adapt a domestic transmission or transfer case to a Land-cruiser transmission or transfer case using only the BlackBox.
Since the front and rear case halves of the Blackbox are cross compatible across the product line, we can simply mix and match BlackBox cases to adapt different combinations, rather than buying a costly adapter that also offers no gear reduction!
Cruiser Transmission adapted to Domestic Transfer case using the BlackBox:
If your build includes a centered rear differential such as Dana 60, and you want to utilize a domestic transfer case with a matching rear output, such as a NP205, or Atlas Transfer case, but also want to retain your Cruiser transmission, this is the solution. This would use a BlackBox-C 19 spline front case half, with a Standard, Titan or i series rear half depending on desired transfer case application.
Domestic Transmission adapted to Cruiser transfer case using the BlackBox:
This is the ticket if you are re-powering your cruiser. Pop an LS and GM automatic into your FJ, and you’re looking at a costly adapter and length that offers no additional gearing advantages. Leverage the BlackBox’s cross compatible design: order a standard front case half mated to a Cruiser rear case half. Multiple advantages, one solution.