Words and photos by Bryan Irons bryanirons. While piloting Tim Toyota the Toyota FJ40 Landcruiser we saved from becoming a permanent backyard ornamentwe have been described as Homer Simpson-esque, comically bamboozling our way along a trail inadvertently associazione everything in, or out, of sight.
We looked out of control and were going WAY too fast. During our last instalment we got the old V8 under the hood running properly and ready to hit the dirt, our problem now was the speed at which it chose to do so. We needed to slow things down and gain some control on the trail before we started snapping parts or flipping over. How do we do this, and what is a crawl ratio? A crawl ratio is the number of engine revolutions per wheel revolution.
It is calculated by multiplying the transmission 1 st gear ratio, transfer case low range ratio, and your axle gear ratio. Too low and it will take you days to go a kilometre, too high and you will not have the control you should, and you can start overheating transmissions or burning out clutches.
We typically like a ratio in the to range for mild trail runners and up to about for our hardcore rigs. We like to drive our rigs to and from the trail, so our first course of action with any new rig is to determine what size tire we plan to run. This is the only point at which we care about tire size. Knowing this, and where our particular engine likes to run when on the highway, gets us a ballpark axle gear ratio.
In our FJ40, we have a 4-speed manual transmission with no overdrive and a torquey small block Chevy under the hood. The 4 th gear ratio and 4.
ToyBox FJ40/FJ60 Dual Case Crawler
This number can be calculated, but we find it is best to use one of the available online charts. We are happy with the 4. Our next stop in the drivetrain is the transmission. An auto TH with 2. Transmission swapping can be an expensive endeavor and seeing as we had recently rebuilt the H42 unit in our FJ40, we were reluctant to change it.
With our respectable axle ratio and our transmission happily in place, that only left our transfer case available to make changes.
The aluminum unit is not known for longevity, or strength, and ours sounded like a badger in a blender.Jump to navigation. Due to the uncertainty surrounding Coronavirus COVIDwith health and safety being a top priority of both our employees and customers, we are doing our part in helping reduce the transmission of COVID by closing our Store Front to the public until further notice.
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Land Cruiser Crawler Gears
This is our Rubicon proven ToyBox dual transfer case low range gear reduction system. The ToyBox is more than just a dual case adapter. It is a system that installs a Toyota pickup low range reduction unit behind 8 different transmission applications. It can be built with a 2. Available as a kit or as a completely assembled bolt in unit, it features helically cut high performance gears that we have sourced from Toyota's own gear cutter in Japan.
They offer the highest level of strength while minimizing gear noise and whine. The rear adapter plate will enable a 3- or 4-speed style Land Cruiser one piece transfer case to bolt directly behind the proven reliability of a Toyota gear driven transfer case reduction box. The length of the ToyBox's adapter plates are 1. Automatic applications are slightly longer. The ToyBox features a top mounted shift handle and has provisions for adding an additional crossmember mount for increased drive train support.
Also, the ToyBox shares its oil with the transmission prolonging both the transmission and the ToyBox's life with cooler oil under operating temperatures. The ToyBox offers flexible gear ratio options. The standard low range is a 2. The high range ratio of 1. A typical setup with a SM transmission, 3-speed stock Land Cruiser transfer case, and 4. Using this same setup, other ToyBox low range gearing options are available.
With the standard 2. We will soon offer a table of all low range gearing options. Shown to the right is a 2. In this setup, the gearing is as follows: Transmission: 6.
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Our Toyota FJ40’s Transmission and T-case Turmoil
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Believe there is a rear in the vehicle now, and would appreciate conversion recommendations. Additionally, if the rear is modified, will changes to the front diff also be necessary?
Hi All: Ha! That said, where are you at? First gear ratio of the H42 four-speed transmission is 3. Regards, Alan. Joined Mar 9, Messages Location princeton B. IF it is stock then a North American 40 series will have 3.Get some cool 4x4 tech every couple of weeks:. We respect your email privacy. Gears, setup kits, and installation are expensive, so this is a mod you usually want to do only once. We'll try to clear up some of the confusion in choosing the right gears for your Toy, and a few parts you might need to make your gears install go smoothly.
We'll mostly talk about Toyota minis and 4Runners in this article with a sprinkling of other models. Toyota V6 and turbo gears 27 spline are found in all 4 cylinder turbo and V6 Toyota pickups and 4Runners in the rear.
Swaps right in to an older 8" housing. Tacomas, Tundras, and Ts use an 8" ring and pinion with a 30 spline pinion in open differentials non-electric locking. Just to make things a little harder, some aftermarket gear manufacturers make Toyota ring and pinions with 29 spline pinions!
The 29 spline pinion never occurred in the factory until the early s. It is a little stronger than a 27 spline pinion. It's easy to buy a triple-drilled 27 spline pinion flange or a triple-drilled 29 spline pinion flange. You can also use a and up pinion flange out of a 4Runner as long as it fits your driveshaft since they had 29 splines from the factory. Most Toyota trucks and 4Runners 8" diffs have 27 spline pinions.
They use a 30 spline pinion. There are also 29 spline pinions in and up 4Runners and maybe some other 8" diffs. So, we'd suggest you use either a 27 spline or 29 spline pinion. The 29 spline is probably better - it's stronger and you can get a triple-drilled flange for it.
That said, 27 spline flanges are very common since they used to be the only option. We suspect, however, that 29 spline pinions are going to be what manufacturers make in the future and that it'll get harder to find 27 spline pinion Toyota gearsets. The Tacoma, Tundra, and T differentials are stronger than the earlier 8" Toyota diffs. This is due to larger carrier bearings and a larger diameter pinion shaft.
However, the ring and pinion won't fit into an earlier diff and the differential itself won't fit into an earlier axle housing.Click on the links below to index to the topic. Show All Hide All. General 2. Torque Specifications 3. Cooling System 4.
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Transmission 5. Brakes, Suspension and Electrical 7. Factory rims 8. Vehicle Weight. Factory rims 7. Engine — Diesel Models : 1. Table all specifications — — Vehicle dimensions. Downloads : Repair Manual downloads — Members area — Please register. Bore — 3. Caster — 1deg.
Factory Rims Bolt hole Pattern — 6 on 5. F — Torque Wrench specs Cylinder Head — 90ft. F — Transmission Manual : 3 or 4 speed forward and 1 reverse gear with syncromesh on second and top gears. Column Shift : On the steering column. Transfer Case : 2 speed, helical sliding gear with front drive selection 4WD models Oil Capacities: 3 Speed transmision — 3.
F — Steering Worm and sector-roller type. Oil capacaty: 0. F — Axles Front axles: Full-floating, banjo-housing, hypoid drive. Heat-treated chrome molybdenum steel axle shafts. Tapered rollers differential bearings. Gear ratio 3. Brakes Hydraulic internal-expanding drum and shoes type acting on all wheels. Hand brake operates on propeller shaft drum type by separate brake mechanism. Suspension Leaf spring type with single acting hydraulic tubular type shock absorbers. Electrical volt negative ground, output regulated by Current Voltage Control system.
Double horns. Sealed type headlamps. Turn indicator lamps and reverse light s. Combined tail and stop lamps. Electrical motor windscreen wipers above and below windshield mounted.Just wanted to give a big thanks for the order!
Arrived in record time, and appreciate the bonus Gday manny received fj40 order today and all is there and everything is perfect thanks for your help Great Customer Service!!! It is nice to find a company that has Integrity!!! Thank You!!! Thanks again for your awesome service - I'm a big fan of your shop.
You're really helping me Radiator was waiting for me when I got home Fri. I received my order in record time and have already installed the parts - perfect fit! Thanks much. Thank you. The rear quarter panels arrived safe and sound.
Better than I had hoped for. I'll be I have finished installing all of my CoolCruiser weatherstrip around both front doors and the three Just whant to say thank you to all at ccot received my order and it is great to deal with such a I have restored a number of cars as a hobby. The restoration process of my FJ40 however has been I just wanted to really thank Coolcruisers for all of your help with everything. Everything you Hi there,have received my order today, thanks for your excellent service.
The parts are perfect, Just a note to thank you for the excellent parts and service. The order arrived in Montana in I got the parts I ordered. They are fantastic! Nice quality and they appear to fit well. Thanks for Thank you for your amazing help, I received my order today and am very happy with your service and Just wanted to say Thank You!
Just letting you know that I received my order today. Can't believe how quick it came. Thank you Just wanted to thank you for making this replacement gas tank available.
Fits a FJ Thanks guys I just received my order everything looks spot on. I appreciate your awesome packing FYI, the last shipment from you arrived today and as expected, the quality of the parts isThe listings below are Transmission and Transfercase Gear Ratios.
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