For half 5 of the construct, we’re gonna present you some particulars on one of the vital vital elements to any 4×4: the switch case. As in years previous, we’re leaning on OffRoad Design, a longtime Final Journey sponsor, for transfer-case beef and gearing. That can come from ORD’s Magnum Underdrive mixed with a Ford NP205 switch case. Beforehand, we have gotten a whole Magnum/205 meeting from ORD, however this 12 months we’re going to take a deeper dive and assemble our personal Magnum Underdrive and Ford NP205 meeting. Test it out.
Why an NP205 … and Why a Ford?
The reality is, there are a number of switch case choices within the off-road realm as we speak and we might select from nearly any of them, however the NP205 is tried, true, and examined in among the harshest environments. This is among the strongest switch instances you may get. Nonetheless, there are some drawbacks. For one, it is fairly heavy. That is an issue we’re pleased to miss, although; its weight is said to its power, and as this weight will probably be down low, it is not the tip of the world. One other disadvantage is the NP205’s low-range gearing. Its gears present a 1:1 excessive vary, and a 1.96:1 low vary. That is usually not sufficient, however worry not—the Magnum Underdrive from ORD solves this drawback with extra gears and extra beefcake power. The Magnum provides a second gear-reduction of two.72:1 forward of the NP205. This provides 4 ratios that we will select from. These are 1:1, 1.96:1, 2.72:1, and 5.33. Add to this the power of the NP205 to ship energy to the entrance axle or rear axle independently, or to each on the similar time. This permits us to do entrance and rear digs, which may help in tight path conditions, climbs, and descents. The rationale we selected a Ford NP205 quite than a GM or Dodge NP205 is so we will use a driver-drop Ford Dana 60 entrance axle. This axle is fascinating for a number of causes, together with its high-pinion ring-and-pinion setup, which provides floor clearance and is stronger in a front-axle utility than a low-pinion axle.
Adapting the NP205 to the Magnum Underdrive
OffRoad Design loves NP205s, particularly aft of their Magnum Underdrive, so this half is straightforward for us. ORD despatched us the Magnum field and a brand new enter gear for the NP205 we had (we acquired the NP205 in a commerce for wheels or one thing up to now). Additionally, fortunate for us, all Ford NP205s have the bigger 90mm input-bearing retaining bore, making including ORD’s Fats Shaft enter gear about so simple as swapping out any NP205 enter gear. Some passenger-drop NP205s have an 80mm enter bore that may should be machined to 90mm to be used with the Magnum. With the ORD-supplied enter gear in hand, we eliminated the rear output meeting from the 205 after which eliminated the present enter gear. It was fairly easy, with the toughest half being securing the needle bearings that stay between the enter and output shafts with transmission meeting lube (you can even use grease or vaseline). With that finished, we disassembled the Magnum into two components and put in one half to the entrance face of the NP205. Then we reassembled the Magnum case halves following the equipped directions.
Mating It All to a 5-Pace Toyota Transmission
OffRoad Design may help you mate a Magnum to many widespread GM, Ford, Jeep, and Dodge transmissions, however we have been on our personal when it got here to mating the Magnum Underdrive to a Toyota transmission. Fortunately for us, and for anybody who needs to make use of a Magnum Underdrive, it’s adaptable to any transmission that you would be able to connect an Advance Adapters Atlas II switch case to. That features the A750e (the “e” designates a 2WD trans) transmission in our Tundra, an utility that Advance Adapters helps with an adapter equipment. Sadly, the A750e in our Tundra is a 2WD model. The 2WD transmission might work, however solely with a spacer that is now not produced mixed with a A750f 4WD tailhousing. We could not discover the spacer, so we contacted a neighborhood junkyard and acquired a 4WD 2006 Tundra A750f (the “f” designates a 4WD trans) for about $500. That allowed us to make use of the Advance Adapters components to mate the Magnum Underdrive to our Tundra’s transmission. The adapter equipment consists of bolts, an adapter plate that bolts to the Toyota transmission, a spud shaft to adapt the transmission output shaft to the Magnum, a seal extension for the Toyota 4WD tailhousing, and a seal for the enter shaft of the Magnum. We did trim about 3/16 of an inch off of the feminine aspect of the spud shaft to make sure that there was no interference within the driveline once we mated the Magnum and NP205 to the A750 transmission.
Final Journey 2022 Official Sponsors:
- Official Jeep Accent: Rugged Ridge
- Official Fender Flare: Bushwacker
- Official Facet Steps: N-Fab
- Official Mattress Cowl: Truxedo
- Official Mapping Instrument: onX Offroad
- Official IH Truck & Scout Components: IH Components America
- Official Shock & Suspension: Skyjacker
- Official Tire: Falken
- Official Artificial Restoration Gear: Bubba Rope
- Official Switch Case: Offroad Design
- Official Winch: Warn
- Official Customized Driveshaft: Quigley Customized Driveshafts