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What is the np 144 used in?The easiest AWD solution for Ranger is:
The Dana 28 found in Aerostar: Bolts up to your transmission, provides AWD = 30/60 split I believe but no low range, wiring will allow it to be more/less locked in a 4 High setting. If you search forum you can find examples of its execution.
The ultimate solution:
Then you can install a np242 transfer case with 2 High-4AWD-4 Lock, Neutral & 4 Lo.
np203 is alternative, but a little heavy for Ranger with 4.0 and I don't think it provide 2 Hi.np144 also works, but doesn't provide 4 Lo. And you would need to be creative to get 4 lock - wiring for motor and position indicators.New Process transfer cases have an actual differential for AWD, versus a clutch in the Borg Warner transfer cases.
Some adjustment to driveshafts is also required with any of the New Process transfer cases.