I could be wrong but I think viscous couplers are an AWD thing.
I looked up the NP271 and 273, which are popular 4x4 t-cases for the Econoline platform, and I didn't see any viscous couplers there. Nor on the NP205, so I infer that 4x4 is straight drive.
Which brings up the point that AWD and 4x4 aren't the same thing. I mean, you probably already know that, but I have to remind myself sometimes.
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Hi, I’m Robert and I’m a vanaholic…
2003 Astro AWD
1999 E350 RB 7.3 cargo
2002 E150 RB 4.6 hightop van conversion
1999 E350 RB 5.4 Chateau
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